Exercise: Computers

Questions for: Computers

Which of the following is not an arithmetic instruction?
A:
INC (increment)
B:
CMP (compare)
C:
DEC (decrement)
D:
ROL (rotate left)
Answer: D
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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: A
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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: C
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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: A
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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: A
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