106A - Computer Organization and Architecture

Dr.G.R.Damodaran College of Science (Autonomous, affiliated to the Bharathiar University, recognized by the UGC)Re-accredited at the 'A' Grade Level by the NAAC and ISO 9001:2008 Certified CRISL rated 'A' (TN) for MBA and MIB Programmes I BCA (2013 - 2016) SEMESTER I Core : Computer Oraganization and Architecture - 106A Multiple Choice Questions. 1. A Binary number system has ____________ digits. A. zero. B. one. C. two. D. three. ANSWER: C 2. ______ computers are the binary number system. A. Analog. B. Super. C. Intra. D. Digital. ANSWER: D 3. A ____ digit is called a bit. A. decimal. B. binary. C. octal. D. hexadecimal. ANSWER: B 4. The ___________ of the computer consists of physical entity of the device. A. software. B. middleware. C. hardware. D. firmware. ANSWER: C

5. Computer ______ consists of instructions and data that computer manipulates to perform data processing tasks. A. software. B. middleware. C. hardware. D. firmware. ANSWER: A 6. A sequence of instructions for the computer is called____________. A. hardware. B. program. C. data. D. instruction. ANSWER: B 7. ________ is concerned with the way the hardware components operate to form computer system. A. Computer organization. B. Computer design. C. Computer architecture. D. Computer implementation. ANSWER: A 8. The manipulation of binary information is done by logic circuits called __________. A. blocks. B. gates. C. symbols. D. functions. ANSWER: B 9. Each gate can be represented in tabular form by a __________. A. symbols. B. function. C. truth table. D. logic. ANSWER: C 10. If both inputs A and B are equal to 1 in AND gate, the output is_______. A. zero. B. one. C. don't care. D. binary. ANSWER: B

11. _________ algebra deals with binary variables and logic operations. A. Boolean. B. Numerical. C. Binary. D. Logic. ANSWER: A 12. A Boolean function can be translated from ______________ expression into a logic diagram. A. boolean. B. logical. C. relational. D. algebric. ANSWER: D 13. The map simplification method is also known as ___________ map. A. karnaugh. B. algebric. C. basic. D. binary. ANSWER: A 14. The condition when it does not matter if the function produces 0 or 1 for a given minterm is ________________. A. SOP. B. POS. C. NOR. D. don't care. ANSWER: D 15. A _________ circuit is a connected arrangement of logic gates with a set of inputs and outputs. A. arithmetic. B. logic. C. combinational. D. shift. ANSWER: C 16. The addition of 2 binary digits is done by ___________ circuit. A. half adder. B. full adder. C. BCD adder. D. composite adder. ANSWER: A

17. A _________ is a combinational circuit that forms sum of 3 input bits. A. half adder. B. full adder. C. BCD adder. D. composite adder. ANSWER: B 18. The storage element employed in clocked sequential circuit is called ___________. A. memory. B. flipflop. C. circuit. D. subtractor. ANSWER: B 19. Dynamic input in SR flip-flop is designated by __________ shaped symbol. A. arrowhead. B. circle. C. rectangle. D. triangle. ANSWER: A 20. In flip-flop input R stands for __________. A. read. B. reset. C. reimburse. D. rectangle. ANSWER: B 21. The _________ flip-flop is a slight modification of SR flip-flop. A. JK. B. T. C. edge triggered. D. D. ANSWER: D 22. In T flip-flop T stands for ___________. A. technical. B. toggle. C. trigger. D. type edged. ANSWER: B

23. Special input terminal for setting the flip-flop is called ______. A. clear. B. set. C. preset. D. reset. ANSWER: C 24. A _____________ circuit is an interconnection of flip-flops and gates. A. combinational. B. arithmetic. C. shift. D. sequential. ANSWER: D 25. The state table of sequential circuit consists of __________ sections. A. one. B. two. C. three. D. four. ANSWER: D 26. The ____________ state shows the states of flip-flops A and B at any given time t. A. input. B. next. C. present. D. output. ANSWER: C 27. The ___________ section gives a value of x for present state. A. next. B. input. C. present. D. output. ANSWER: B 28. In logic gates, a bubble is represented by a ____________. A. triangle. B. square. C. circle. D. rectangle. ANSWER: C

29. The __________ number inside each circle identifies the state of flip-flops. A. octal. B. binary. C. decimal. D. hexadecimal ANSWER: B 30. Digital circuits are constructed with ______ circuits. A. arithmetic. B. logic. C. integrated. D. shift. ANSWER: C 31. ____________ devices have a complexity of approximately 10 to 200 gates in a single package. A. MSI. B. LSI. C. IC. D. VLSI. ANSWER: A 32. TTL stands for __________ logic. A. transistor-transmission. B. transistor-transistor. C. transmission-transistor. D. transmission-transmission. ANSWER: A 33. The multiplexer is also called ________ selector since it selects one of many data inputs. A. line. B. data. C. binary. D. octal. ANSWER: B 34. A _______ is a digital circuit that performs the inverse operation of a decoder. A. multiplexer. B. adder. C. subtractor. D. encoder. ANSWER: D

35. When the number of bits in the sum exceeds the number of bits in each of the numbers added ___________ results. A. inflow. B. outflow. C. overflow. D. exceed. ANSWER: C 36. A ________ is a group of flip-flops. A. memory. B. circuit. C. register. D. bits. ANSWER: C 37. A register is capable of storing __________ bit of information. A. one. B. two. C. three. D. four. ANSWER: A 38. The transformation of new information into a register is __________ the register. A. moving. B. registering. C. loading. D. translating. ANSWER: C 39. The _______ input in the register determines the action to be taken with each clock pulse. A. buffer. B. register. C. load. D. zero. ANSWER: C 40. In shift register,_____ input determines the shift what goes into the leftmost position during the shift. A. serial. B. buffer. C. register. D. zero. ANSWER: A

41. There are ________ basic arithmetic operations. A. one. B. two. C. three. D. four. ANSWER: D 42. The arithmetic processor is simple if it has only fixed point ________ instruction. A. add. B. subtract. C. multiply. D. division. ANSWER: A 43. The solution to any problem stated by a finite number of procedural steps is _________. A. procedure. B. algorithm. C. subprogram. D. specification. ANSWER: B 44. During addition of 2 numbers signs of A and B are _________ compare the magnitude. A. same. B. different. C. large. D. small. ANSWER: B 45. ____________ algorithm gives a procedure for multiplying binary integers in signed 2's complement representation. A. Hardware. B. Booth. C. Multiplicand. D. Multiplication ANSWER: B 46. The multiplication of 2 floating point numbers is done by ___________ the mantissa and _________ the exponents. A. multiply,add. B. add,multiply. C. subtract,divide. D. add,subtract. ANSWER: A

47. A decimal arithmetic unit is a ___________ function that performs decimal micro operations. A. analog. B. logical. C. digital. D. boolean. ANSWER: C 48. A straight subtraction of 2 numbers requires a __________ circuit. A. BCD adder. B. subtractor. C. division. D. subtractor ANSWER: B 49. The means of entering information into computer is through a ___________. A. mouse. B. keyboard. C. printer. D. monitor ANSWER: B 50. The ___________ subsystem of a computer provides communication between central system and outside environment. A. input/output. B. input. C. output. D. exit. ANSWER: A 51. Computer system includes special hardware called _____________ between CPU and peripherals to supervise and synchronize input and output transfers. A. peripheral. B. links. C. interface D. byte. ANSWER: C 52. PSW stands for _________. A. peripheral status word. B. program status word. C. poly status word byte. D. program segment word ANSWER: B

53. A _______________ interrupt is a system that establishes a priority over sources to determine which condition to service first. A. software. B. hardware. C. priority. D. device. ANSWER: C 54. Convert the following decimal number to binary: 1998. A. 11111001110. B. 111111101110. C. 111100011110. D. 111000111000 ANSWER: A 55. The CPU responds to the interrupt signal by storing the ___________ address from program counter. A. stack. B. memory. C. return. D. I/O. ANSWER: C 56. In a _______________ interrupt, the branch address is assigned to fixed location in memory. A. vector. B. non vector. C. pipeline. D. priority. ANSWER: B 57. In ________ interrupt, the branch address is either a fixed location in memory or is stored in a fixed location in memory. A. priority. B. address. C. vectored. D. non vector ANSWER: D 58. I/O routines issue control commands to check the _________ status. A. memory. B. vector. C. device. D. address ANSWER: C

59. Devices that provide backup storage are called ___________ memory. A. main. B. auxiliary. C. backup. D. device. ANSWER: B 60. The memory unit that directly communicates with CPU is called __________ memory. A. main. B. auxiliary. C. device. D. backup. ANSWER: A 61. The ____________ memory access time is less than the access time of the main memory. A. virtual. B. associative. C. cache. D. mapping. ANSWER: C 62. Many OS enable the CPU to proceeds a number of independent programs concurrently called ____________ A. multitasking. B. multiprogramming. C. multi processing. D. multiple functions ANSWER: B 63. RAM stands for _________. A. random access memory. B. random memory. C. read only memory. D. read access memory. ANSWER: A 64. Static RAM connects of flip-flops to store ______________ information's. A. octal. B. binary. C. decimal. D. hexadecimal ANSWER: B

65. RAM is _______________ its contents are destroyed when power is turned off. A. non volatile. B. permanent. C. volatile. D. initial. ANSWER: A 66. Initial program is stored in ROM portion of main memory called _____________ loader. A. linking. B. volatile. C. non volatile. D. bootstrap. ANSWER: D 67. The ___________ map is pictorial representation of assigned address space for each chip in the system. A. memory address. B. link address. C. register address. D. loader address. ANSWER: A 68. A tract in magnetic disk in a given sector near the circumstance is ________ than near the centre. A. smaller. B. longer. C. thinner. D. bigger. ANSWER: B 69. A disk drive with removable disks is called _____________ disk. A. magnetic tape. B. magnetic. C. floppy. D. record. ANSWER: C 70. A memory unit accessed by content is ___________ memory. A. virtual. B. cache. C. mapping. D. associative. ANSWER: D

71. References to memory within a few localized areas in memory referred as ___________ of reference. A. locality. B. memory. C. array. D. phenomenon ANSWER: A 72. The performance of cache memory is measured in terms of ___________ ratio. A. loss. B. hit. C. percentage. D. average. ANSWER: B 73. When the CPU refers to memory & find the word in cache it is called __________. A. hit. B. miss. C. map. D. success. ANSWER: A 74. The transformation of date from main memory to cache memory is called ____________ process. A. execution. B. mapping. C. unmapping. D. loading. ANSWER: B 75. The basic component of arithmetic circuit is________. A. parallel subtractor. B. parallel adder. C. half adder. D. full adder. ANSWER: B 76. The micro operation that specifies binary operations for strings of bits stored in registers are___________. A. logic micro operation. B. shift micro operation. C. arithmetic micro operation. D. register transfer micro operation ANSWER: A

77. The addition and subtraction operations can be combined into one common circuit by including a _______________ gate with each full adder. A. exclusive-OR. B. AND. C. OR. D. NAND. ANSWER: A 78. The name of the operation that complements bits in A register where there are corresponding 1's in B register is _______. A. selective set. B. selective complement. C. selective clear. D. mask. ANSWER: B 79. LIFO stands for _______________. A. last in flag out. B. last in first out. C. loop in first out. D. loop in flag out ANSWER: B 80. The storage devices that stores information in a manner that the item stored last in first item retrieved is__________. A. queue. B. stack. C. CPU. D. register. ANSWER: B 81. The operation of deletion in stack is____________. A. PUSH. B. POP. C. FRONT. D. REAR. ANSWER: B 82. SP stands for _____________. A. Storage Pointer. B. Seek Pointer. C. Stack Pointer. D. Synchronous Pointer ANSWER: C

83. The expansion of RPN is ____________. A. Reverse Polish Notation. B. Review Polish Notation. C. Reverse Pointer Notation. D. Review Pointer Notation. ANSWER: A 84. The notation A+B is ______________. A. prefix notation. B. postfix notation. C. infix notation. D. none of these. ANSWER: C 85. The bits of the instruction are divided into groups called______________. A. formats. B. fields. C. bytes. D. address. ANSWER: B 86. ADD R1, A, B is_______________. A. zero address instruction format. B. one address instruction format. C. two address instruction format. D. three address instruction format. ANSWER: D 87. RISC stands for_____________. A. Reduced Instruction Set Computer. B. Reverse Instruction Set Computer. C. Reduced Implied Set Computer. D. Reverse Implied Set Computer. ANSWER: A 88. The mode in which the effective address is equal to the address part of instruction is ______. A. indirect addressing mode. B. direct addressing mode. C. register addressing mode. D. relative addressing mode. ANSWER: B

89. The instruction that performs arithmetic, logic and shift operations are____________. A. data transfer instruction. B. data manipulation instruction. C. register transfer instruction. D. program control instruction. ANSWER: B 90. The mnemonic used for increment are___________. A. INX. B. INC. C. INR. D. INL. ANSWER: B 91. SISD stands for_____________. A. Single Instruction stream, Single Data stream. B. Simple Instruction stream, Simple Data stream. C. Stack Instruction stream, Stack Data stream. D. Storage Instruction stream, Storage Data stream. ANSWER: A 92. The instruction provides decision making capabilities are___________. A. data transfer instruction. B. data manipulation instruction. C. register transfer instruction. D. program control instruction. ANSWER: D 93. The ____________ contains an address to specify the desired location in the memory. A. word count register. B. address register. C. control register. D. None of the above. ANSWER: B 94. The step by step procedure is______________. A. flow chart. B. control flow graph. C. algorithm. D. pseudo code. ANSWER: C

95. MISD means______________. A. Multiple Instruction stream, Single Data stream. B. Memory Instruction stream, Single Data stream. C. Multiple Instruction stream, Storage Data stream. D. Memory Instruction stream, Storage Data stream. ANSWER: A 96. DR stands for_______________. A. Direct Register. B. Data Register. C. Division Register. D. Decrement Register ANSWER: A 97. The addressing mode where the operands are specified implicitly in the definition of the register are_______________. A. register addressing mode. B. immediate addressing mode C. indirect addressing mode. D. implied addressing mode. ANSWER: D 98. The instructions that cause transfer of data from one location to another without changing the binary information content are_______________. A. data transfer instruction. B. data manipulation instruction. C. register transfer instruction. D. program control instruction. ANSWER: A 99. The Mnemonic used for exchanging instruction is______________. A. ECH. B. XCH. C. EXH. D. EHX. ANSWER: B 100. Status bits are also called_______________. A. set bits. B. reset bits. C. flag bits. D. selection bits. ANSWER: C

101. The processor that performs computations on large arrays of data is ______________. A. auxiliary processor. B. array processor. C. attached processor. D. arithmetic processor. ANSWER: B 102. The computer code for interchanging the information between terminals is___________. A. ASCII. B. BCD. C. EBCDIC. D. CDIE. ANSWER: A 103. A byte consists of____________. A. one bit. B. four bits. C. eight bits. D. sixteen bits. ANSWER: C 104. The mnemonic used for clear instruction are__________. A. CLR. B. CLX. C. CLC. D. CRL. ANSWER: A 105. The notation AB+ is____________. A. prefix notation. B. postfix notation. C. arithmetic notation. D. infix notation. ANSWER: B 106. The field that specifies the way the operand or the effective address is determined is ____________. A. processor field. B. mode field. C. operation code field. D. address field. ANSWER: C

107. The Instruction MUL R1, R2 is__________. A. zero address instruction format. B. one address instruction format. C. two address instruction format. D. three address instruction format. ANSWER: C 108. TOS represents______________. A. Top Of Simulator. B. Top Of Stack. C. Top Of Storage. D. Top Of System. ANSWER: B 109. The 10's complement of a decimal number is equal to its _____________. A. 9's complement + 1. B. 9's complement - 1. C. 8's complement + 2. D. 8's complement - 2. ANSWER: A 110. AR represents____________. A. Auto Register. B. Address Register. C. Auxiliary Register. D. Associate Register. ANSWER: B 111. The addressing mode where the controls of an index register is added to the address part of the instruction_____. A. relative addressing mode. B. direct addressing mode. C. indexed addressing mode. D. immediate addressing mode. ANSWER: B 112. The mnemonic used for the instruction output is_________. A. OUTPUT. B. OUT. C. O/P. D. OT. ANSWER: B

113. The instructions that perform binary operations on strings of bits stored in registers_______. A. logical instructions. B. shift instructions. C. arithmetic instructions. D. complement instructions. ANSWER: A 114. The mnemonic used for skip instruction are______. A. SKIP. B. SKI. C. SKP. D. SK. ANSWER: C 115. The interrupt that comes from input/output devices are___________. A. internal interrupts. B. external interrupts. C. software interrupts. D. hardware interrupts. ANSWER: B 116. The term that provides simultaneous data processing tasks are____________. A. parallel processing. B. array processing. C. vector processing. D. distributed processing. ANSWER: A 117. Any method for controlling access to or use of memory is known as ________. A. memory map. B. memory protection. C. memory management. D. memory instruction. ANSWER: B 118. The ________ holds the number of words to be transferred to the memory. A. word count register B. address register. C. control register. D. program register ANSWER: A

119. The ___________ specifies the mode of transfer to the desired location in the memory A. word count register. B. address register. C. control register. D. program register ANSWER: C 120. BCD represents_______. A. Binary Coded Decimal. B. Binary Coded Data. C. Binary Computational Decimal D. Binary Computational Data ANSWER: A 121. The algorithm that gives a procedure for multiplying binary integer in signed 2's complement representation is_______. A. binary algorithm. B. boolean algorithm. C. booth algorithm. D. fixed algorithm. ANSWER: C 122. The command that causes the interface to respond by transferring data from the bus into one of its registers__________. A. data input command. B. data output command. C. data control command. D. data status command. ANSWER: B 123. Binary information is represented in digital computers by physical quantities called______. A. signals. B. bits. C. volts. D. symbols. ANSWER: A 124. The expansion of BCD is ________________. A. Binary Codiac Decimal. B. Binary Coded Decimal. C. Binary Coded Digit. D. Binary Codiac Digit. ANSWER: B

125. The two variable K map consist of ________ boxes. A. 3 B. 4 C. 6 D. 8 ANSWER: B 126. The base or radix of octal number system is _______________ A. 2 B. 16 C. 10 D. 8 ANSWER: D 127. The base or radix of hexadecimal number system is _____________ A. 2 B. 16 C. 10 D. 8 ANSWER: B 128. RAM represents _____________ A. read access memory B. random access memory C. rotate access memory D. reverse access memory ANSWER: B 129. The flip flop used to synchronize the state change during a clock pulse transition is ___________ A. JK flip flop. B. T flip flop C. edge triggered flip flop. D. RS flip flop. ANSWER: C 130. The relationship between a function and its binary variables can be represented in _________ A. boolean function. B. truth table. C. logic diagram. D. combinational circuits. ANSWER: B

131. The NOR gate is complement of ________ A. AND gate B. OR gate C. NAND gate D. NOT gate ANSWER: B 132. The theorem which deals with NOR and NAND gates are ______ A. demorgan's theorem B. baye's theorem C. boolean's theorem D. booth's theorem ANSWER: A 133. The ALS represents _____________ A. Arithmetic Logic Shift Unit. B. Auto Logic Shift Unit. C. Arithmetic Logic Simple Unit. D. Auto Logic Shift Unit. ANSWER: A 134. The mnemonic used for halt computer _____________ A. HALT B. HAT C. HLT D. HTL ANSWER: C 135. The program that translates a high level language program into binary is called __________ A. translator. B. compiler. C. interpreter. D. simulator. ANSWER: B 136. A set of common instruction that can be used in a program many times is called a __________ A. function. B. subroutine. C. method. D. structure. ANSWER: B

137. A memory that is part of a control unit is referred to as ___________ A. primary memory. B. secondary memory. C. control memory. D. virtual memory. ANSWER: C 138. The register that keeps track of the instructions in the program stored in memory is __________ A. control register B. program register C. status register D. direct register ANSWER: B 139. The addressing mode the operands are in registers that reside within CPU is ___________ A. register mode. B. register indirect mode. C. implied mode. D. indexed addressing mode. ANSWER: A 140. The sequence of instruction read from memory constitutes an _________ A. instruction stream. B. data stream. C. implied stream. D. immediate stream. ANSWER: A 141. The conflicts that arise when an instruction depends on the result of a previous instruction is called _________ A. resource conflicts B. branch difficulties. C. data dependency conflicts. D. data independency conflicts. ANSWER: C 142. The part of a processor unit that executes arithmetic operations is _______ A. array processor. B. arithmetic processor. C. vector processor. D. multiprocessor. ANSWER: B

143. In addition algorithm, the signs of A and B are __________ A. identical. B. different. C. dissimilar. D. asymmetry ANSWER: A 144. Floating point division requires that the exponent be subtracted and the ___________ are divided. A. exponents. B. mantissas C. radix. D. base. ANSWER: B 145. The communication between central system and the outside environment is done by ____________ A. input-output subsystem. B. control system. C. memory system. D. logic system. ANSWER: A 146. The mnemonic used for the name rotate left is _________ A. ROL B. ROTL C. RTAL D. RTEL ANSWER: A 147. In NAND gate, if both the inputs are 1,the output will be ________ A. no output B. 1 C. 0 D. both b & c ANSWER: C 148. The mnemonic used for test instruction is ___________ A. TST B. TSX C. TSC D. TET ANSWER: A

149. The base or radix of decimal number system is ____________ A. 2 B. 16 C. 10 D. 8 ANSWER: C 150. The operations performed on the data in the processor constitutes __________ A. instruction stream. B. pipeline stream. C. data stream. D. multiple stream. ANSWER: C 151. The conflicts that arise from branch and other instructions that change the value of program counter is ______________ A. resource conflicts. B. branch difficulties. C. data dependency conflicts. D. data independency conflicts. ANSWER: B 152. The access method of RAM is ___________ if bits are considered the unit of data access. A. random B. parallel C. serial D. direct ANSWER: B 153. Software programs permanently stored in a read only memory (ROM) are called _________ A. software B. firmware C. hardware D. vaporware ANSWER: B 154. Which of the following are the two main components of the CPU? A. Control unit and registers. B. Registers and main memory. C. Control unit and ALU. D. Control unit and ALU. ANSWER: D

155. The two basic types of record access methods are ________ A. sequential and random. B. sequential and indexed. C. direct and immediate. D. online and real time. ANSWER: A 156. Which of the following is used as a primary storage device? A. Magnetic drum. B. PROM. C. Floppy disk. D. Optic Reader. ANSWER: B 157. A collection of 8 bits is called _________ A. byte B. word C. record D. field ANSWER: A 158. CD-ROM stands for _________ A. Compactable Read Only Memory. B. Compact Data Read Only Memory. C. Compactable Disk Read Only Memory. D. Compact Disk Read Only Memory. ANSWER: D 159. ALU is _________ A. Arithmetic Logic Unit. B. Array Logic Unit. C. Application Logic Unit. D. Array Lack Unit. ANSWER: A 160. MSI stands for ________ A. Medium Scale Integrated Circuits. B. Medium System Integrated Circuits. C. Medium Scale Intelligent Circuit. D. Medium System Intelligent Circuit. ANSWER: A

161. MICR stands for ____________ A. Magnetic Ink Character Reader. B. Magnetic Ink Code Reader. C. Magnetic Ink Cases Reader. D. Magnetic Ignition Character Reader. ANSWER: A 162. What is the control unit's function in the CPU? A. to transfer data to primary storage. B. to store program instruction. C. to perform logic operations. D. to decode program instruction. ANSWER: D 163. What is meant by a dedicated computer? A. Used by one person only. B. Assigned to one and only one task. C. Does one kind of software. D. Meant for application software only. ANSWER: B 164. The most common addressing techniques employed by a CPU is ___________ A. immediate. B. direct. C. indirect. D. direct, indirect, register, immediate. ANSWER: D 165. A micro program written as string of 0's and 1's is a ___________ A. symbolic microinstruction B. binary microinstruction. C. symbolic microprogram. D. binary microprogram. ANSWER: D 166. Interrupts which are initiated by an instruction are _________ A. internal. B. external. C. hardware. D. software. ANSWER: B

167. Memory access in RISC architecture is limited to ___________ and _______ instructions. A. CALL and RET. B. PUSH and POP. C. STA and LDA. D. MOV and JMP. ANSWER: C 168. How many address lines are needed to address each memory locations in a 2048* 4 memory chip? A. 10 B. 11 C. 8 D. 12 ANSWER: B 169. In immediate addressing the operand is placed _________ A. in the CPU register. B. after OP code in the instruction. C. in memory. D. in stack. ANSWER: B 170. Microprocessor 8085 can address location up to __________ A. 32K B. 128K C. 64K D. 1M ANSWER: C 171. . The ALU and control unit of most of the microcomputers are combined and manufacture on a single silicon chip. What is it called? A. Monochip. B. Microprocessor. C. ALU. D. Control unit. ANSWER: B 172. When the RET instruction at the end of subroutine is executed _______ A. the information where the stack is initialized is transferred to the stack pointer. B. the memory address of the RET instruction is transferred to the program counter. C. two data bytes stored in the top two locations of the stack are transferred to the program counter. D. two data bytes stored in the top two locations of the stack are transferred to the stack pointer. ANSWER: C

173. A microprogram is sequencer perform the operation _______ A. read. B. write. C. execute. D. read and execute. ANSWER: D 174. The base or radix of binary number system is _________ A. 2 B. 16 C. 10 D. 8 ANSWER: A 175. Which statement is valid about magnetic tape? A. It is a plastic ribbon. B. It is coated on both sides with iron oxide. C. It can be erased and reused. D. All of above. ANSWER: D 176. The data recording format in most of the modern magnetic tape is __________ A. 7-bit ASCII. B. 7-bit EBCDIC. C. 8-bit ASCII. D. 8-bit EBCDIC. ANSWER: D 177. Which of the following is associated with error detector? A. Odd parity bit. B. Even parity bit. C. Both of the above. D. Clarity. ANSWER: C 178. Tape speed is measured in ________ A. feet per second. B. inch per second. C. meter per second. D. centimeter per second. ANSWER: B

179. Magnetic disks are the most popular medium for _________ A. direct access. B. sequential access. C. both of above. D. none of above. ANSWER: C 180. Storage capacity of magnetic disk depends on ________ A. tracks per inch of surface. B. bits per inch of tracks. C. disk pack in disk surface. D. all of above. ANSWER: D 181. Reading data is performed in magnetic disk by __________ A. read/write leads. B. sectors. C. track. D. lower surface. ANSWER: A 182. Access time is __________ A. seek time + latency time. B. seek time. C. seek time - latency time. D. latency time. ANSWER: A 183. Seek time is _______ A. time to position the head over proper track. B. time to position the head over proper sector. C. time to position the head over proper cylinder. D. none of above. ANSWER: A 184. Latency time is _________ A. time to spin the needed data under head. B. time to spin the needed data under track. C. time to spin data under sector. D. all of above. ANSWER: A

185. Floppy disks are available in _________ A. single side single density. B. single side double density. C. both of above. D. none of above. ANSWER: C 186. Floppy disks typically in diameter _________ A. 3'' B. 5.25'' C. 8'' D. all the above ANSWER: D 187. Hard disk is coated in both side above _________ A. magnetic metallic oxide. B. optical metallic oxide. C. carbon layer. D. all of the above. ANSWER: A 188. Binary circuit elements have _________ A. one stable state. B. two stable state. C. three stable state. D. zero state. ANSWER: B 189. Which statement is valid? A. 1KB = 1024 bytes B. 1 MB = 2048 bytes C. 1 Mb = 1000 kilobytes D. 1 Kb = 1000 bytes ANSWER: A 190. Which statement is valid about computer program? A. It is understood by a computer. B. It is understood by programmer. C. It is understood by the user. D. Both of above. ANSWER: D

191. Software in computer __________ A. enhances the capabilities of the hardware machine. B. increase the speed of central processing unit. C. both of above. D. decreases the speed of central processing unit. ANSWER: A 192. Which of the following is not computer language? A. High level language. B. Medium level language. C. Low level language. D. All of the above. ANSWER: B 193. Which language is directly understood by the computer without translation program? A. Machine language. B. Assembly language. C. High level language. D. None of above. ANSWER: A 194. Instruction in computer languages consists of _________ A. opcode. B. operand. C. both of above. D. all zero's ANSWER: C 195. Machine language is __________ A. machine dependent. B. difficult to program. C. error prone. D. machine independent. ANSWER: D 196. A floppy disk contains _______ A. circular tracks only. B. sectors only. C. both circular tracks and sectors. D. neither circular nor sector. ANSWER: C

197. The octal equivalent of 111010 is __________ A. 81 B. 72 C. 71 D. 82 ANSWER: B 198. A computer program that converts an entire program into machine language at one time is called a/an ______ A. interpreter. B. simulator. C. compiler. D. commander. ANSWER: C 199. UNIVAC is _________ A. universal Automatic Computer. B. universal Array Computer. C. unique Automatic Computer. D. unvalued Automatic Computer. ANSWER: A 200. Example for zero address instructions is __________ A. push. B. load a. C. move r1,a D. store x. ANSWER: A 201. Where does a computer add and compare data? A. Hard disk. B. Floppy disk. C. CPU chip. D. Memory chip. ANSWER: C 202. Which of the following registers is used to keep track of address of the memory location where the next instruction is located? A. Memory address register. B. Memory data register. C. Instruction register. D. Program register. ANSWER: D

203. A complete microcomputer system consists of _________ A. microprocessor. B. memory. C. peripheral equipment. D. all of above. ANSWER: D 204. CPU performs _______ operation. A. data transfer. B. logic operation. C. arithmetic operation. D. all the above. ANSWER: D 205. The technique which allows the DMA controller to transfer one data word at a time, after which it must return control of the buses to the CPU is known as _______ A. bus request. B. cycle stealing. C. bus grant. D. burst transfer. ANSWER: B 206. A stack is _____ A. an 8-bit register in the microprocessor. B. a 16-bit register in the microprocessor. C. a set of memory locations in R/W mode reserved for storing information temporarily during the execution of computer. D. a 16-bit memory address stored in the program counter. ANSWER: C 207. A stack pointer is ________ A. a 16-bit register in the microprocessor that indicate the beginning of the stack memory. B. a register that decodes and executes 16-bit arithmetic expression C. The first memory location where a subroutine address is stored. D. a register in which flag bits are stored. ANSWER: A 208. The branch logic that provides decision making capabilities in the control unit is known as _________ A. controlled transfer. B. conditional transfer. C. unconditional transfer. D. none of above. ANSWER: C

209. The decimal number 10 is represented in the Hexadecimal Number System as _________ A. B B. C C. D D. A ANSWER: D 210. A time sharing system imply _________ A. more than one processor in the system. B. more than one program in memory. C. more than one memory in the system. D. none of above. ANSWER: B 211. Processors of all computers, whether micro, mini or mainframe must have__________ A. ALU. B. primary storage. C. control unit. D. all of above. ANSWER: D 212. The decimal number 11 is represented in the hexadecimal number system as ______ A. B B. C C. D D. A ANSWER: A 213. The octal number 735 is represented in the decimal number system as ________ A. 478 B. 477 C. 487 D. 774 ANSWER: B 214. The decimal number 250.5 is represented in the hexadecimal number system as A. FA.B B. 8C.F C. FA.8 D. AF.8 ANSWER: C

215. Ripple counters are sometimes called as ____________ counters. A. BCD. B. synchronous. C. asynchronous. D. None of these. ANSWER: C 216. Which of the following code is used in present day computing was developed by IBM corporation? A. ASCII. B. Hollerith Code. C. Baudot code. D. EBCDIC code. ANSWER: D 217. When a subroutine is called, the address of the instruction following the CALL instructions stored in/on the _________ A. stack pointer. B. accumulator. C. program counter. D. stack. ANSWER: D 218. A microprogram written as string of 0's and 1's is a ___________ A. symbolic microinstruction. B. binary microinstruction. C. symbolic microprogram. D. binary microprogram. ANSWER: D 219. The decimal number 14 is represented in the hexadecimal number system as _________ A. B B. E C. D D. A ANSWER: B 220. decimal number 15 is represented in the hexadecimal number system as _______ A. F B. C C. D D. A ANSWER: A

221. The decimal number 16 is represented in the hexadecimal number system as __________ A. F B. C C. H D. A ANSWER: C 222. The ascending order or a data hierarchy is _________ A. bit -bytes - fields - record - file - database. B. bit - bytes- record - field -file - database. C. bytes - bit - field- record - file - database. D. bytes- bit -record - field - file -database. ANSWER: A 223. Excess-3 Codes are _______ A. sequential. B. binary. C. BCD. D. weighted. ANSWER: A 224. An Excess-3 code is obtained by adding _______ to a decimal number. A. 6 B. 3 C. 33 D. 2 ANSWER: B 225. Arithmetic operations in a computer are done using binary numbers and not decimal numbers and these take place in it __________ unit. A. arithmetic. B. logic. C. control. D. memory. ANSWER: A 226. The position of 0 or 1 in a binary number indicates its ________ within the number. A. weight. B. position. C. place. D. order. ANSWER: A

227. In the minterm, a variable appears either in complemented form if it possesses a value of _______ A. 3 B. 0 C. 1 D. 2 ANSWER: B 228. In the maxterm, a variable appears either in complemented form if it possesses a value of __________ A. 3 B. 0 C. 1 D. 2 ANSWER: C 229. A micro program is sequencer perform the operation of ________ A. read. B. write. C. read and write. D. read and execute. ANSWER: D 230. In the minterm, a variable appears either in uncomplemented form if it possesses a value of ________ A. 3 B. 0 C. 1 D. 2 ANSWER: C 231. The binary equivalent of 43 is ______ A. 100101. B. 101011. C. 101010. D. 101110. ANSWER: B 232. The gate that gives 1 output if any one of the input is 1, IS _______ A. AND B. NAND C. NOT D. OR ANSWER: D

233. MOD 10 counter will count up to ________ A. 7 B. 8 C. 6 D. 9 ANSWER: D 234. With respect to Boolean Algebra, A.1 = ? A. A B. 1 C. 0 D. None ANSWER: B 235. 8085 has ________ data lines. A. 8 B. 16 C. 32 D. None ANSWER: B 236. MVI A, 55 H is an example for _________ addressing mode. A. direct. B. register. C. immediate. D. none. ANSWER: C 237. _________ is used to eliminate the speed mismatch between processor and IO devices. A. IO interface. B. Priority. C. Daisy chain. D. Memory. ANSWER: A 238. How many address lines are needed to address a memory of size 8 KB? A. 11 B. 12 C. 13 D. 14 ANSWER: B

239. Which of the following is a storage location that holds inputs and outputs for the ALU? A. Control unit. B. ALU. C. I/O device. D. Register. ANSWER: C 240. ________ is a physical partition. A. Page. B. Segment. C. DMA. D. Register. ANSWER: A 241. What coding format encodes a real number as a mantissa multiplied by a power (exponent) of two? A. Binary. B. Excess notation. C. Floating point. D. Two's complement. ANSWER: B 242. Which of the following does not result from floating point math operations? A. Underflow. B. Overflow. C. Truncation. D. Two's complement. ANSWER: C 243. What character coding method is used in IBM 360 compatible mainframe computers? A. ASCII. B. BCD. C. EBCDIC. D. Unicode. ANSWER: C 244. Which of the following data structures is a group of data elements that usually describes a single entity or event? A. Array. B. Index. C. linked list. D. record. ANSWER: A

245. The table depicts device control codes from the ______ character coding standard. A. ASCII. B. BCD. C. EBCDIC. D. IEEE. ANSWER: A 246. What is the result of adding the following two positive binary bit strings? 101101.101 and + 10100.0010 A. 1000001.1110. B. 1000001.1010. C. 1000001.1000. D. 1000001.1100. ANSWER: D 247. What device performs the three functions depicted in the boxes on the left side of the figure? A. Arithmetic Logic Unit. B. NAND Gate C. Pointer Unit. D. Control Unit. ANSWER: A 248. The CPU cycle during which an instruction is moved from primary storage to the control unit is ____ A. fetch. B. execution. C. access. D. refresh. ANSWER: C 249. What type of processor does not directly implement instructions that combine data movement and manipulation? A. CISC. B. RISC. C. Microprocessor. D. PSW. ANSWER: D 250. When the control unit fetches an instruction from memory, it stores it in the _______ A. instruction pointer. B. program status word. C. opcode. D. instruction register. ANSWER: B

Staff Name SANTHIYA.N.