MCQOPTIONS
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MCQOPTIONS
This section includes 90 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
(2FAOC)16 is equivalent to _____. |
| A. | (195 084)10 |
| B. | (001011111010 0000 1100)2 |
| C. | Both A.and (B) |
| D. | None of these |
| Answer» C. Both A.and (B) | |
| 2. |
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» C. 88% | |
| 3. |
Logic X-OR operation of (4ACO) H & (B53F) H results |
| A. | AACB |
| B. | 0000 |
| C. | FFFF |
| D. | ABCD |
| Answer» D. ABCD | |
| 4. |
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» B. is the easiest language to write programs | |
| 5. |
. A binary digit is called a |
| A. | Bit |
| B. | Byte |
| C. | Number |
| D. | Character |
| Answer» B. Byte | |
| 6. |
can be represented in a signed magnitude format and in a 1’s complement format as |
| A. | 111011 & 100100 |
| B. | 100100 & 111011 |
| C. | 011011 & 100100 |
| D. | 100100 & 011011 |
| Answer» B. 100100 & 111011 | |
| 7. |
The average time required to reach a storage location in memory and obtainits contents is called the _____. |
| A. | seek time |
| B. | turnaround time |
| C. | access time |
| D. | transfer time |
| Answer» D. transfer time | |
| 8. |
. In a memory-mapped I/O system, which of the following will not be there? |
| A. | LDA |
| B. | IN |
| C. | ADD |
| D. | OUT |
| Answer» B. IN | |
| 9. |
The maximum addressing capacity of a micro processor which uses 16 bit database &32 bit address base is |
| A. | 64 K. |
| B. | 4 GB. |
| C. | both (A) & (B) . |
| D. | None of these. |
| Answer» C. both (A) & (B) . | |
| 10. |
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» C. signed magnitude method | |
| 11. |
A group of bits that tell the computer to perform a specific operation is known as |
| A. | Instruction code |
| B. | Micro-operation |
| C. | Accumulator |
| D. | Register |
| Answer» B. Micro-operation | |
| 12. |
Generally Dynamic RAM is used as main memory in a computer system asit______. |
| A. | Consumes less power |
| B. | has higher speed |
| C. | has lower cell density |
| D. | needs refreshing circuitry |
| Answer» C. has lower cell density | |
| 13. |
The communication between the components in a microcomputer takes place viathe address and |
| A. | I/O bus |
| B. | Data bus |
| C. | Address bus |
| D. | Control lines |
| Answer» C. Address bus | |
| 14. |
If the main memory is of 8K bytes and the cache memory is of 2K words. Ituses associative mapping. Then each word of cache memory shall be_____. |
| A. | 11 bits |
| B. | 21 bits |
| C. | 16 bits |
| D. | 20 bits |
| Answer» D. 20 bits | |
| 15. |
. 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» E. | |
| 16. |
Floating point representation is used to store ______. |
| A. | Boolean values |
| B. | whole numbers |
| C. | real integers |
| D. | integers |
| Answer» D. integers | |
| 17. |
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» C. (11001) 2 | |
| 18. |
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» E. | |
| 19. |
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» C. signed magnitude method | |
| 20. |
The operation executed on data stored in registers is called |
| A. | Macro-operation |
| B. | Micro-operation |
| C. | Bit-operation |
| D. | Byte-operation |
| Answer» C. Bit-operation | |
| 21. |
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» B. the time it takes for the read-write head to move into position over the appropriate track | |
| 22. |
A Stack-organised Computer uses instruction of _____. |
| A. | Indirect addressing |
| B. | Two-addressing |
| C. | Zero addressing |
| D. | Index addressing |
| Answer» D. Index addressing | |
| 23. |
_________ register keeps tracks of the instructions stored in program storedin memory. |
| A. | AR (Address Register) |
| B. | XR (Index Register) |
| C. | PC (Program Counter) |
| D. | AC (Accumulator) |
| Answer» D. AC (Accumulator) | |
| 24. |
MIMD stands for _____. |
| A. | Multiple instruction multiple data |
| B. | Multiple instruction memory data |
| C. | Memory instruction multiple data |
| D. | Multiple information memory data |
| Answer» B. Multiple instruction memory data | |
| 25. |
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» C. Branch and shift address | |
| 26. |
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» E. | |
| 27. |
Virtual memory consists of |
| A. | Static RAM |
| B. | Dynamic RAM |
| C. | Magnetic memory |
| D. | None of these |
| Answer» B. Dynamic RAM | |
| 28. |
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» D. Locality of reference & memory | |
| 29. |
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» C. 88% | |
| 30. |
The circuit used to store one bit of data is known as_______. |
| A. | Register |
| B. | Encoder |
| C. | Decoder |
| D. | Flip Flop |
| Answer» E. | |
| 31. |
Translation from symbolic program into Binary is done in_____. |
| A. | Two passes. |
| B. | Directly |
| C. | Three passes. |
| D. | Four passes. |
| Answer» B. Directly | |
| 32. |
The multiplicand register & multiplier register of a hardware circuitimplementing booth's algorithm have (11101) & (1100). The result shall be ______. |
| A. | (812)10 |
| B. | (-12)10 |
| C. | (12)10 |
| D. | (-812)10 |
| Answer» B. (-12)10 | |
| 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» E. | |
| 34. |
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» B. (-12) 10 | |
| 35. |
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» C. (11001)2 | |
| 36. |
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» E. | |
| 37. |
(2FAOC) 16 is equivalent to |
| A. | (195 084) 10 |
| B. | (001011111010 0000 1100) 2 |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» C. Both (A) and (B) | |
| 38. |
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» E. | |
| 39. |
The instruction ‘ORG O’ is a______. |
| A. | Machine Instruction. |
| B. | Pseudo instruction. |
| C. | High level instruction. |
| D. | Memory instruction. |
| Answer» C. High level instruction. | |
| 40. |
n bits in operation code imply that there are ___________ possible distinct operators |
| A. | 2n |
| B. | 2n |
| C. | n/2 |
| D. | n2 |
| Answer» C. n/2 | |
| 41. |
Virtual memory consists of _______. |
| A. | Static RAM |
| B. | Dynamic RAM |
| C. | Magnetic memory |
| D. | None of these |
| Answer» B. Dynamic RAM | |
| 42. |
Content of the program counter is added to the address part of the instruction in order to obtain the effective address is called. |
| A. | relative address mode. |
| B. | index addressing mode. |
| C. | register mode. |
| D. | implied mode. |
| Answer» B. index addressing mode. | |
| 43. |
MRI indicates |
| A. | Memory Reference Information. |
| B. | Memory Reference Instruction. |
| C. | Memory Registers Instruction. |
| D. | Memory Register information |
| Answer» C. Memory Registers Instruction. | |
| 44. |
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» E. | |
| 45. |
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» D. none of these | |
| 46. |
Microinstructions are stored in control memory groups, with each group specifying a |
| A. | Routine |
| B. | Subroutine |
| C. | Vector |
| D. | Address |
| Answer» B. Subroutine | |
| 47. |
‘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» B. Registers which keep track of when the program was last accessed. | |
| 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» C. Branch and shift address | |
| 49. |
An interface that provides a method for transferring binary information betweeninternal storage and external devices is called |
| A. | I/O interface |
| B. | Input interface |
| C. | Output interface |
| D. | I/O bus |
| Answer» B. Input interface | |
| 50. |
If the value V(x) of the target operand is contained in the address field itself, theaddressing mode is |
| A. | immediate. |
| B. | direct. |
| C. | indirect. |
| D. | implied. |
| Answer» C. indirect. | |