Computers problems
- 1. Which of the following is not an arithmetic instruction?
Options- A. INC (increment)
- B. CMP (compare)
- C. DEC (decrement)
- D. ROL (rotate left) Discuss
Correct Answer: ROL (rotate left)
- 2. Which is not an operand?
Options- A. Variable
- B. Register
- C. Memory location
- D. Assembler Discuss
Correct Answer: Assembler
- 3. Which method bypasses the CPU for certain types of data transfer?
Options- A. Software interrupts
- B. Interrupt-driven I/O
- C. Polled I/O
- D. Direct memory access (DMA) Discuss
Correct Answer: Direct memory access (DMA)
- 4. During a read operation the CPU fetches ________.
Options- A. a program instruction
- B. another address
- C. data itself
- D. all of the above Discuss
Correct Answer: all of the above
- 5. The Pentium microprocessor has a data bus of ________.
Options- A. 16 bits
- B. 32 bits
- C. 64 bits
- D. 128 bits Discuss
Correct Answer: 64 bits
- 6. The Pentium can address ________.
Options- A. 1 MB
- B. 1 GB
- C. 2 GB
- D. 4 GB Discuss
Correct Answer: 4 GB
- 7. A port can be ________.
Options- A. strictly for input
- B. strictly for output
- C. bidirectional
- D. all of the above Discuss
Correct Answer: all of the above
- 8. The process of jointly establishing communication is called ________.
Options- A. DMA
- B. bidirectional addressing
- C. multiplexing
- D. handshaking Discuss
Correct Answer: handshaking
- 9. With interrupt-driven I/O, if two or more devices request service at the same time, ________.
Options- A. the device closest to the CPU gets priority
- B. the device that is fastest gets priority
- C. the device assigned the highest priority is serviced first
- D. the system is likely to crash Discuss
Correct Answer: the device assigned the highest priority is serviced first
- 10. The first microprocessor had a(n)________.
Options- A. 1-bit data bus
- B. 2-bit data bus
- C. 4-bit data bus
- D. 8-bit data bus Discuss
Correct Answer: 4-bit data bus
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