MCQOPTIONS
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MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Compilers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 | |
| 2. |
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. | |
| 3. |
Virtual memory consists of _______ |
| A. | Static RAM |
| B. | Dynamic RAM |
| C. | Magnetic memory |
| D. | None of the mentioned |
| Answer» B. Dynamic RAM | |
| 4. |
Translation from symbolic program into Binary is done in__________ |
| A. | Two passes |
| B. | Directly |
| C. | Three passes |
| D. | Four passes |
| Answer» B. Directly | |
| 5. |
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» B. Execution of RST instruction | |
| 6. |
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 | |
| 7. |
'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 | |
| 8. |
The instruction 'ORG O' is a______ |
| A. | Machine Instruction |
| B. | Pseudo instruction |
| C. | High level instruction |
| D. | Memory instruction |
| Answer» C. High level instruction | |
| 9. |
A floating point number that has an O in the MSB of mantissa is said to have__________ |
| A. | Overflow |
| B. | Underflow |
| C. | Important number |
| D. | Undefined |
| Answer» C. Important number | |
| 10. |
Semantic Analyzer is used for? |
| A. | Generating Object code |
| B. | Main ting symbol table |
| C. | None of the mentioned |
| D. | Both of the mentioned |
| Answer» E. | |
| 11. |
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 | |
| 12. |
Suppose One of the Operand is String and other is Integer then it does not throw error as it only checks whether there are two operands associated with '+' or not . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
The fourth Generation computer was made up of? |
| A. | Transistor |
| B. | Vacuum tubes |
| C. | Chips |
| D. | Microprocessor chips |
| Answer» E. | |
| 14. |
What does a Syntactic Analyzer do? |
| A. | Maintain Symbol Table |
| B. | Collect type of information |
| C. | Create parse tree |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
Which of these features of assembler are Machine-Dependent |
| A. | Instruction formats |
| B. | Addressing modes |
| C. | Program relocation |
| D. | All of the mentioned |
| Answer» E. | |
| 16. |
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 | |
| 17. |
The addressing mode used in an instruction of the form ADD X Y, is _____ |
| A. | Absolute |
| B. | Indirect |
| C. | Index |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 18. |
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 mentioned |
| Answer» C. The branch address is obtained from a register in the processor | |
| 19. |
_________ 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» D. AC (Accumulator) | |
| 20. |
If memory access takes 20 ns with cache and 110 ns without it, then the ratio (cache uses a 10 ns memory) is _____ |
| A. | 0.93 |
| B. | 0.9 |
| C. | 0.88 |
| D. | 0.87 |
| Answer» C. 0.88 | |
| 21. |
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. | |
| 22. |
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» C. Has lower cell density | |
| 23. |
Von Neumann architecture is ______ |
| A. | SISD |
| B. | SIMD |
| C. | MIMD |
| D. | MISD |
| Answer» B. SIMD | |
| 24. |
Cache memory acts between_______ |
| A. | CPU and RAM |
| B. | RAM and ROM |
| C. | CPU and Hard Disk |
| D. | None of the mentioned |
| Answer» B. RAM and ROM | |
| 25. |
The circuit used to store one bit of data is known as ______ |
| A. | Encoder |
| B. | OR gate |
| C. | Flip Flop |
| D. | Decoder |
| Answer» D. Decoder | |