Digital Electronics - Computers

Exercise :: Computers - General Questions

11. 

What is occurring when two or more sources of data attempt to use the same bus?

A. Bus contention
B. Direct memory access
C. Bus interruption
D. PPI

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

12. 

Which of the following is not a jump instruction?

A. JB (jump back)
B. JA (jump above)
C. JO (jump if overflow)
D. JMP (unconditional jump)

Answer: Option A

Explanation:

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13. 

Which of the following was not a design improvement for the 8086/8088 over the 8085?

A. Execution unit (EU)
B. 16-bit data bus
C. Arithmetic logic unit (ALU)
D. Bus interface unit (BIU)

Answer: Option C

Explanation:

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14. 

Polled I/O works best when ________.

A. there are no priority considerations
B. priority considerations are frequent
C. the polling rate exceeds 1000 s
D. the polling rate is below 1000 s

Answer: Option A

Explanation:

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15. 

Which of the following is not an arithmetic instruction?

A. INC (increment)
B. CMP (compare)
C. DEC (decrement)
D. ROL (rotate left)

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.