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Computer System Architecture - Input-Output Organization Online Exam Quiz

Important questions about Computer System Architecture - Input-Output Organization. Computer System Architecture - Input-Output Organization MCQ questions with answers. Computer System Architecture - Input-Output Organization exam questions and answers for students and interviews.

1. The 8085 microprocessor responds to the presence of an interrupt

Options

A : As soon as the TRAP pin becomes 'LOW'

B : By checking the TRAP pin for 'high' status at the end of each instruction fetch

C : By checking the TRAP pin for 'high' status at the end of the execution of each instruction

D : By Checking the TRAP pin for 'high' status at regular intervals

2. CPU has two modes privileged and non-privileged.In order to change the mode from privileged to non-privileged

Options

A : A hardware interrupt is needed

B : A software interrupt is needed

C : Either (a) or (b)

D : A non-privileged instruction (which does not generate an interrupt) is needed

3. The TRAP interrupt mechanism of the 8085 microprocessor executes

Options

A : An RST by hardware

B : The instruction supplied by external device through the INTA signal

C : An instruction from memory location 20 H

D : None of these

4. Which of the following interrupts are unmaskable interrupts ?

Options

A : RST 5.5

B : RST 7.5

C : TRAP

D : Both (a) and (b)

5. The address range to which I/O chip will respond is

Options

A : 0000 H to FFFF H

B : 0000 H to 5FFF H

C : 4000 H to 5FFFF H

D : None of these

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