McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Computer Applications (BCA) .
| 101. |
A floating point number that has a O in the MSB of mantissa is said to have_____. |
| A. | Overflow |
| B. | Underflow |
| C. | Important number |
| D. | Undefined |
| Answer» B. Underflow | |
| 102. |
Translation from symbolic program into Binary is done in_____. |
| A. | Two passes. |
| B. | Directly |
| C. | Three passes. |
| D. | Four passes. |
| Answer» A. Two passes. | |
| 103. |
The instruction ‘ORG O’ is a______. |
| A. | Machine Instruction. |
| B. | Pseudo instruction. |
| C. | High level instruction. |
| D. | Memory instruction. |
| Answer» B. Pseudo instruction. | |
| 104. |
‘Aging registers’ are _______. |
| A. | Counters which indicate how long ago their associated pages have been referenced. |
| B. | Registers which keep track of when the program was last accessed. |
| C. | Counters to keep track of last accessed instruction. |
| D. | Counters to keep track of the latest data structures referred. |
| Answer» A. Counters which indicate how long ago their associated pages have been referenced. | |
| 105. |
Memory unit accessed by content is called______. |
| A. | Read only memory |
| B. | Programmable Memory |
| C. | Virtual Memory |
| D. | Associative Memory |
| Answer» D. Associative Memory | |
| 106. |
_________ register keeps tracks of the instructions stored in program stored in memory. |
| A. | AR (Address Register) |
| B. | XR (Index Register) |
| C. | PC (Program Counter) |
| D. | AC (Accumulator) |
| Answer» C. PC (Program Counter) | |
| 107. |
n bits in operation code imply that there are ___________ possible distinct operators. |
| A. | 2n |
| B. | 2n |
| C. | n/2 |
| D. | n2 |
| Answer» B. 2n | |
| 108. |
A three input NOR gate gives logic high output only when_____. |
| A. | one input is high |
| B. | one input is low |
| C. | two input are low |
| D. | all input are high |
| Answer» D. all input are high | |
| 109. |
The circuit converting binary data in to decimal is_____. |
| A. | Encoder |
| B. | Multiplexer |
| C. | Decoder |
| D. | Code converter |
| Answer» D. Code converter | |
| 110. |
The multiplicand register & multiplier register of a hardware circuit implementing booth's algorithm have (11101) & (1100). The result shall be ______. |
| A. | (812)10 |
| B. | (-12)10 |
| C. | (12)10 |
| D. | (-812)10 |
| Answer» A. (812)10 | |
| 111. |
PSW is saved in stack when there is a _____. |
| A. | interrupt recognized |
| B. | execution of RST instruction |
| C. | Execution of CALL instruction |
| D. | All of these |
| Answer» A. interrupt recognized | |
| 112. |
In computers, subtraction is carried out generally by____. |
| A. | 1's complement method |
| B. | 2's complement method |
| C. | signed magnitude method |
| D. | BCD subtraction method |
| Answer» B. 2's complement method | |
| 113. |
The main memory in a Personal Computer (PC) is made of_____. |
| A. | cache memory. |
| B. | static RAM |
| C. | Dynamic Ram |
| D. | bothA.and (B). |
| Answer» D. bothA.and (B). | |
| 114. |
Cache memory works on the principle of_____. |
| A. | Locality of data |
| B. | Locality of memory |
| C. | Locality of reference |
| D. | Locality of reference & memory |
| Answer» C. Locality of reference | |
| 115. |
An n-bit microprocessor has_____. |
| A. | n-bit program counter |
| B. | n-bit address register |
| C. | n-bit ALU |
| D. | n-bit instruction register |
| Answer» D. n-bit instruction register | |
| 116. |
When CPU is executing a Program that is part of the Operating System, it is said to be in _____. |
| A. | Interrupt mode |
| B. | System mode |
| C. | Half mode |
| D. | Simplex mode |
| Answer» B. System mode | |
| 117. |
Logic X-OR operation of (4ACO)H& (B53F)H results _____. |
| A. | AACB |
| B. | 0000 |
| C. | FFFF |
| D. | ABCD |
| Answer» C. FFFF | |
| 118. |
If the main memory is of 8K bytes and the cache memory is of 2K words. It uses associative mapping. Then each word of cache memory shall be_____. |
| A. | 11 bits |
| B. | 21 bits |
| C. | 16 bits |
| D. | 20 bits |
| Answer» C. 16 bits | |
| 119. |
A Stack-organised Computer uses instruction of _____. |
| A. | Indirect addressing |
| B. | Two-addressing |
| C. | Zero addressing |
| D. | Index addressing |
| Answer» C. Zero addressing | |
| 120. |
In a program using subroutine call instruction, it is necessary______. |
| A. | initialize program counter |
| B. | Clear the accumulator |
| C. | Reset the microprocessor |
| D. | Clear the instruction register |
| Answer» D. Clear the instruction register | |
| 121. |
Virtual memory consists of _______. |
| A. | Static RAM |
| B. | Dynamic RAM |
| C. | Magnetic memory |
| D. | None of these |
| Answer» A. Static RAM | |
| 122. |
In signed-magnitude binary division, if the dividend is (11100)2 and divisor is (10011)2 then the result is ______. |
| A. | (00100)2 |
| B. | (10100)2 |
| C. | (11001)2 |
| D. | (01100)2 |
| Answer» B. (10100)2 | |
| 123. |
Generally Dynamic RAM is used as main memory in a computer system as it______. |
| A. | Consumes less power |
| B. | has higher speed |
| C. | has lower cell density |
| D. | needs refreshing circuitry |
| Answer» B. has higher speed | |
| 124. |
Write Through technique is used in which memory for updating the data _____. |
| A. | Virtual memory |
| B. | Main memory |
| C. | Auxiliary memory |
| D. | Cache memory |
| Answer» D. Cache memory | |
| 125. |
Cache memory acts between_______. |
| A. | CPU and RAM |
| B. | RAM and ROM |
| C. | CPU and Hard Disk |
| D. | None of these |
| Answer» A. CPU and RAM | |
| 126. |
The circuit used to store one bit of data is known as ______. |
| A. | Encoder |
| B. | OR gate |
| C. | Flip Flop |
| D. | Decoder |
| Answer» C. Flip Flop | |
| 127. |
Von Neumann architecture is ______. |
| A. | SISD |
| B. | SIMD |
| C. | MIMD |
| D. | MISD |
| Answer» A. SISD | |
| 128. |
. In a memory-mapped I/O system, which of the following will not be there? |
| A. | LDA |
| B. | IN |
| C. | ADD |
| D. | OUT |
| Answer» A. LDA | |
| 129. |
If memory access takes 20 ns with cache and 110 ns without it, then the ratio (cache uses a 10 ns memory) is _____. |
| A. | 93% |
| B. | 90% |
| C. | 88% |
| D. | 87% |
| Answer» B. 90% | |
| 130. |
The addressing mode used in an instruction of the form ADD X Y, is _____. |
| A. | Absolute |
| B. | indirect |
| C. | index |
| D. | none of these |
| Answer» C. index | |
| 131. |
_________ register keeps track of the instructions stored in program stored in memory. |
| A. | AR (Address Register) |
| B. | XR (Index Register) |
| C. | PC (Program Counter) |
| D. | AC (Accumulator) |
| Answer» C. PC (Program Counter) | |
| 132. |
The idea of cache memory is based ______. |
| A. | on the property of locality of reference |
| B. | on the heuristic 90-10 rule |
| C. | on the fact that references generally tend to cluster |
| D. | all of the above |
| Answer» A. on the property of locality of reference | |
| 133. |
The average time required to reach a storage location in memory and obtain its contents is called the _____. |
| A. | seek time |
| B. | turnaround time |
| C. | access time |
| D. | transfer time |
| Answer» C. access time | |
| 134. |
(2FAOC)16 is equivalent to _____. |
| A. | (195 084)10 |
| B. | (001011111010 0000 1100)2 |
| C. | Both A.and (B) |
| D. | None of these |
| Answer» B. (001011111010 0000 1100)2 | |
| 135. |
The circuit used to store one bit of data is known as_______. |
| A. | Register |
| B. | Encoder |
| C. | Decoder |
| D. | Flip Flop |
| Answer» D. Flip Flop | |
| 136. |
. Computers use addressing mode techniques for ____________. |
| A. | giving programming versatility to the user by providing facilities as pointers to memory counters for loop control |
| B. | to reduce no. of bits in the field of instruction |
| C. | specifying rules for modifying or interpreting address field of the instruction |
| D. | All the above |
| Answer» D. All the above | |
| 137. |
What characteristic of RAM memory makes it not suitable for permanent storage? |
| A. | too slow |
| B. | unreliable |
| C. | it is volatile |
| D. | too bulky |
| Answer» C. it is volatile | |
| 138. |
The amount of time required to read a block of data from a disk into memory is composed of seek time, rotational latency, and transfer time. Rotational latency refers to ______. |
| A. | the time its takes for the platter to make a full rotation |
| B. | the time it takes for the read-write head to move into position over the appropriate track |
| C. | the time it takes for the platter to rotate the correct sector under the head |
| D. | none of the above |
| Answer» A. the time its takes for the platter to make a full rotation | |
| 139. |
In computers, subtraction is generally carried out by ______. |
| A. | 9’s complement |
| B. | 10’s complement |
| C. | 1’s complement |
| D. | 2’s complement |
| Answer» D. 2’s complement | |
| 140. |
Assembly language ________. |
| A. | uses alphabetic codes in place of binary numbers used in machine language |
| B. | is the easiest language to write programs |
| C. | need not be translated into machine language |
| D. | None of these |
| Answer» A. uses alphabetic codes in place of binary numbers used in machine language | |
| 141. |
Floating point representation is used to store ______. |
| A. | Boolean values |
| B. | whole numbers |
| C. | real integers |
| D. | integers |
| Answer» C. real integers | |
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