McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
| 101. |
Translation from symbolic program into Binary is done in_____. |
| A. | . two passes. |
| B. | . directly |
| C. | . three passes. |
| D. | . four passes. |
| Answer» A. . two passes. | |
| 102. |
The instruction ‘ORG O’ is a______. |
| A. | . machine instruction. |
| B. | . pseudo instruction. |
| C. | . high level instruction. |
| D. | . memory instruction. |
| Answer» B. . pseudo instruction. | |
| 103. |
‘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. | |
| 104. |
Memory unit accessed by content is called______. |
| A. | . read only memory |
| B. | . programmable memory |
| C. | . virtual memory |
| D. | . associative memory |
| Answer» D. . associative memory | |
| 105. |
_________ 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) | |
| 106. |
n bits in operation code imply that there are ___________ possible distinct operators. |
| A. | . 2n |
| B. | . 2n |
| C. | . n/2 |
| D. | . n2 |
| Answer» B. . 2n | |
| 107. |
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 | |
| 108. |
The circuit converting binary data in to decimal is_____. |
| A. | . encoder |
| B. | . multiplexer |
| C. | . decoder |
| D. | .code converter |
| Answer» D. .code converter | |
| 109. |
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 | |
| 110. |
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 | |
| 111. |
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 | |
| 112. |
The main memory in a Personal Computer (PC) is made of_____. |
| A. | . cache memory. |
| B. | . static ram |
| C. | . dynamic ram |
| D. | . both (a).and (b). |
| Answer» D. . both (a).and (b). | |
| 113. |
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 | |
| 114. |
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 | |
| 115. |
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 | |
| 116. |
Logic X-OR operation of (4ACO)H& (B53F)H results _____. |
| A. | . aacb |
| B. | . 0000 |
| C. | . ffff |
| D. | . abcd |
| Answer» C. . ffff | |
| 117. |
Then each word of cache memory shall be_____. |
| A. | . 11 bits |
| B. | . 21 bits |
| C. | . 16 bits |
| D. | . 20 bits |
| Answer» C. . 16 bits | |
| 118. |
A Stack-organised Computer uses instruction of _____. |
| A. | . indirect addressing |
| B. | . two-addressing |
| C. | . zero addressing |
| D. | . index addressing |
| Answer» C. . zero addressing | |
| 119. |
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 | |
| 120. |
Virtual memory consists of _______. |
| A. | . static ram |
| B. | . dynamic ram |
| C. | . magnetic memory |
| D. | . none of these |
| Answer» A. . static ram | |
| 121. |
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 | |
| 122. |
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 | |
| 123. |
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 | |
| 124. |
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 | |
| 125. |
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 | |
| 126. |
Von Neumann architecture is ______. |
| A. | . sisd |
| B. | . simd |
| C. | . mimd |
| D. | . misd |
| Answer» A. . sisd | |
| 127. |
In a vectored interrupt. |
| A. | . the branch address is assigned to a fixed location in memory. |
| B. | . the interrupting source supplies the branch information to the processor through an interrupt vector. |
| C. | . the branch address is obtained from a register in the processor |
| D. | . none of the above |
| Answer» B. . the interrupting source supplies the branch information to the processor through an interrupt vector. | |
| 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. |
Which of the following is not a weighted code? |
| A. | . decimal number system |
| B. | . excess 3-cod |
| C. | . binary number system |
| D. | . none of these |
| Answer» B. . excess 3-cod | |
| 134. |
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 | |
| 135. |
(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 | |
| 136. |
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 | |
| 137. |
. 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 | |
| 138. |
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 | |
| 139. |
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 | |
| 140. |
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 | |
| 141. |
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 | |
| 142. |
the number of cycles required for transfer stayed the same what would the bandwidth of the bus? |
| A. | . 1 megabyte/sec |
| B. | . 4 megabytes/sec |
| C. | . 8 megabytes/sec |
| D. | . 2 megabytes/sec |
| Answer» D. . 2 megabytes/sec | |
| 143. |
Floating point representation is used to store ______. |
| A. | . boolean values |
| B. | . whole numbers |
| C. | . real integers |
| D. | . integers |
| Answer» C. . real integers | |
| 144. |
SIMD represents an organization that ______________. |
| A. | . refers to a computer system capable of processing several programs at the same time. |
| B. | . represents organization of single computer containing a control unit, processor unit and a memory unit. |
| C. | . includes many processing units under the supervision of a common control unit |
| D. | . none of the above. |
| Answer» C. . includes many processing units under the supervision of a common control unit | |
| 145. |
In Reverse Polish notation, expression A*B+C*D is written as |
| A. | . ab*cd*+ |
| B. | . a*bcd*+ |
| C. | . ab*cd+* |
| D. | . a*b*cd+ |
| Answer» A. . ab*cd*+ | |
| 146. |
Processors of all computers, whether micro, mini or mainframe must have |
| A. | . alu |
| B. | . primary storage |
| C. | . control unit |
| D. | . all of above |
| Answer» B. . primary storage | |
| 147. |
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» C. . to perform logic operations | |
| 148. |
What is meant by a dedicated computer? |
| A. | . which is used by one person only |
| B. | . which is assigned to one and only one task |
| C. | . which does one kind of software |
| D. | . which is meant for application software only |
| Answer» D. . which is meant for application software only | |
| 149. |
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. . ebcdic code | |
| 150. |
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. . stack | |
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