Input Output Organization - Computer Awareness Objective Questions with Answers

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Questions
1 Which of the following statement is FALSE in view of interrupts ?
A interrupts are changes in flow of control caused by some event related to I/O.
B interrupts are synchronous with a program.
C when an interrupt occurs, some actions are taken, and then system returns to exactly same state as it was before the interrupt.
D none of the above

Answer: Option [B]
2 An attempt to execute illegal or undefined instruction may lead to
A Trap event
B I/O interrupt
C CPU malfunctioning
D None of the above

Answer: Option [A]
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3 DMA module can communicate with CPU through
A Interrupt
B Cycle stealing
C Branch instruction
D None of the above

Answer: Option [B]
4 Interrupts which are initiated by an instruction are
A Internal
B External
C Hardware
D Software

Answer: Option [D]
5 A CPU generally handles an interrupt by executing an interrupt service routine
A as soon as an interrupt is raised
B by checking the interrupt register at the end of fetch cycle
C by checking the interrupt register after finishing the executing the current instruction
D by checking the interrupt register at fixed time intervals

Answer: Option [A]

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