McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Computer Applications (BCA) .
| 1. |
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*+ | |
| 2. |
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 | |
| 3. |
Floating point representation is used to store |
| A. | Boolean values |
| B. | whole numbers |
| C. | real integers |
| D. | integers |
| Answer» C. real integers | |
| 4. |
Suppose that a bus has 16 data lines and requires 4 cycles of 250 nsecs each to transfer data. The bandwidth of this bus would be 2 Megabytes/sec. If the cycle time of the bus was reduced to 125 nsecs and 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 | |
| 5. |
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 | |
| 6. |
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 | |
| 7. |
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 | |
| 8. |
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 | |
| 9. |
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 | |
| 10. |
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 | |
| 11. |
(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 | |
| 12. |
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 | |
| 13. |
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 | |
| 14. |
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 | |
| 15. |
Which of the following is lowest in memory hierarchy? |
| A. | Cache memory |
| B. | Secondary memory |
| C. | Registers |
| D. | RAM |
| Answer» B. Secondary memory | |
| 16. |
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 | |
| 17. |
If memory access takes 20 ns with cache and 110 ns with out it, then the ratio ( cache uses a 10 ns memory) is |
| A. | 93% |
| B. | 90% |
| C. | 88% |
| D. | 87% |
| Answer» B. 90% | |
| 18. |
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 | |
| 19. |
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. | |
| 20. |
Von Neumann architecture is |
| A. | SISD |
| B. | SIMD |
| C. | MIMD |
| D. | MISD |
| Answer» A. SISD | |
| 21. |
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 | |
| 22. |
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 | |
| 23. |
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 | |
| 24. |
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 circuitary |
| Answer» B. has higher speed | |
| 25. |
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 | |
| 26. |
Virtual memory consists of |
| A. | Static RAM |
| B. | Dynamic RAM |
| C. | Magnetic memory |
| D. | None of these |
| Answer» A. Static RAM | |
| 27. |
In a program using subroutine call instruction, it is necessary |
| A. | initialise program counter |
| B. | Clear the accumulator |
| C. | Reset the microprocessor |
| D. | Clear the instruction register |
| Answer» D. Clear the instruction register | |
| 28. |
A Stack-organised Computer uses instruction of |
| A. | Indirect addressing |
| B. | Two-addressing |
| C. | Zero addressing |
| D. | Index addressing |
| Answer» C. Zero addressing | |
| 29. |
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 | |
| 30. |
A-Flip Flop can be converted into T-Flip Flop by using additional logic circuit |
| A. | n TQD =• |
| B. | T D = |
| C. | D = T . Q n |
| D. | n TQD =⊕ |
| Answer» D. n TQD =⊕ | |
| 31. |
Logic X-OR operation of (4ACO) H & (B53F) H results |
| A. | AACB |
| B. | 0000 |
| C. | FFFF |
| D. | ABCD |
| Answer» C. FFFF | |
| 32. |
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 | |
| 33. |
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 | |
| 34. |
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 | |
| 35. |
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) . | |
| 36. |
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 | |
| 37. |
PSW is saved in stack when there is a |
| A. | interrupt recognised |
| B. | execution of RST instruction |
| C. | Execution of CALL instruction |
| D. | All of these |
| Answer» A. interrupt recognised | |
| 38. |
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 | |
| 39. |
The circuit converting binary data in to decimal is |
| A. | Encoder |
| B. | Multiplexer |
| C. | Decoder |
| D. | Code converter |
| Answer» D. Code converter | |
| 40. |
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 | |
| 41. |
n bits in operation code imply that there are ___________ possible distinct operators |
| A. | 2n |
| B. | 2n |
| C. | n/2 |
| D. | n2 |
| Answer» B. 2n | |
| 42. |
_________ 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) | |
| 43. |
Memory unit accessed by content is called |
| A. | Read only memory |
| B. | Programmable Memory |
| C. | Virtual Memory |
| D. | Associative Memory |
| Answer» D. Associative Memory | |
| 44. |
‘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. | |
| 45. |
The instruction ‘ORG O’ is a |
| A. | Machine Instruction. |
| B. | Pseudo instruction. |
| C. | High level instruction. |
| D. | Memory instruction. |
| Answer» B. Pseudo instruction. | |
| 46. |
Translation from symbolic program into Binary is done in |
| A. | Two passes. |
| B. | Directly |
| C. | Three passes. |
| D. | Four passes. |
| Answer» A. Two passes. | |
| 47. |
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 | |
| 48. |
The BSA instruction is |
| A. | Branch and store accumulator |
| B. | Branch and save return address |
| C. | Branch and shift address |
| D. | Branch and show accumulator |
| Answer» B. Branch and save return address | |
| 49. |
Logic gates with a set of input and outputs is arrangement of |
| A. | Combinational circuit |
| B. | Logic circuit |
| C. | Design circuits |
| D. | Register |
| Answer» A. Combinational circuit | |
| 50. |
MIMD stands for |
| A. | Multiple instruction multiple data |
| B. | Multiple instruction memory data |
| C. | Memory instruction multiple data |
| D. | Multiple information memory data |
| Answer» A. Multiple instruction multiple data | |
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