Computers Questions and Answers
Digital Electronics aptitude questions and answers are an essential part of computer and electronics engineering preparation. These questions test a candidate’s understanding of number systems, logic gates, Boolean algebra, and circuit design — all key concepts for campus placements and competitive exams. Practicing aptitude questions with solutions PDF helps strengthen problem-solving ability in topics like combinational and sequential circuits. Whether you’re preparing for Infosys, Wipro, TCS, or GATE, mastering digital electronics questions with answers ensures better accuracy and confidence. This section provides well-explained aptitude test practice questions designed to improve your technical reasoning and analytical thinking.
Computers
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35 questions
11. What is occurring when two or more sources of data attempt to use the same bus?
- Bus contention
- Direct memory access
- Bus interruption
- PPI
12. Which of the following is not a jump instruction?
- JB (jump back)
- JA (jump above)
- JO (jump if overflow)
- JMP (unconditional jump)
13. Which of the following was not a design improvement for the 8086/8088 over the 8085?
- Execution unit (EU)
- 16-bit data bus
- Arithmetic logic unit (ALU)
- Bus interface unit (BIU)
14. Polled I/O works best when ________.
- there are no priority considerations
- priority considerations are frequent
- the polling rate exceeds 1000 s
- the polling rate is below 1000 s
15. Which of the following is not an arithmetic instruction?
- INC (increment)
- CMP (compare)
- DEC (decrement)
- ROL (rotate left)
16. During a read operation the CPU fetches ________.
- a program instruction
- another address
- data itself
- all of the above
17. The first Intel microprocessor to contain on-board cache memory was the ________.
- 80386
- 80486
- Pentium
- Pentium Pro
18. Which of the following is not an 8086/8088 general-purpose register?
- Code segment (CS)
- Data segment (DS)
- Stack segment (SS)
- Address segment (AS)
19. Which of the following is not a computer bus?
- Data bus
- Control bus
- Timer bus
- Address bus
20. With interrupt-driven I/O, if two or more devices request service at the same time, ________.
- the device closest to the CPU gets priority
- the device that is fastest gets priority
- the device assigned the highest priority is serviced first
- the system is likely to crash