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LZCO_522_C3B

Authored by Dr Zaini

Computers

University

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LZCO_522_C3B
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38 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main disadvantage of programmed I/O compared to interrupt-driven I/O?

It requires more memory.

The processor has to wait and continuously check the I/O module.

It does not use a control line.

It has a complex interrupt handling process.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In interrupt-driven I/O, when does the processor check for interrupts?

Only at system startup.

After every few cycles.

At the end of each instruction cycle.

Only when I/O operations are required.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of saving the program counter (PC) and processor status word (PSW) during an interrupt?

To initialize a new program.

To ensure the I/O module completes its task.

To resume the interrupted program accurately.

To reset the processor for a new task.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What sequence does the processor follow when it receives an interrupt signal from an I/O device?

Completes current instruction, acknowledges the interrupt, saves state, and loads the interrupt handler.

Loads the interrupt handler, saves state, acknowledges interrupt, and completes the instruction.

Saves state, completes current instruction, loads interrupt handler, and resumes work.

Acknowledges interrupt, completes current instruction, loads interrupt handler, and saves state.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not a technique used to determine which device issued an interrupt?

Multiple interrupt lines.

Software poll.

Daisy chain.

Stack allocation.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main disadvantage of using a software poll for identifying interrupting devices?

It requires extra hardware.

It is very time-consuming.

It cannot handle multiple interrupts.

It only works with certain I/O devices.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the daisy chain technique manage interrupts?

Each I/O module has a dedicated line to the processor.

I/O modules share a common interrupt request line with the interrupt acknowledge line passing through each module.

It uses software polling.

It assigns a priority level to each device.

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