Question Discussion & Solution

MCQ

Whenever a process needs I/O to or from a disk it issues a ______________

system call to the CPU

system call to the operating system

a special procedure

all of the mentioned

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What is a circular buffer?

writes to the end of its space and then continues at the beginning

overwrites older values as it goes

all of the mentioned

none of the mentioned

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If a process needs I/O to or from a disk, and if the drive or controller is busy then ____________

the request will be placed in the queue of pending requests for that drive

the request will not be processed and will be ignored completely

the request will be not be placed

none of the mentioned

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What will happens when a process closes the file?

per-process table entry is not removed

system wide entry

all of the mentioned

none of the mentioned

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What is a magneto-optic disk?

primary storage

secondary storage

removable disk

none of the mentioned

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In the ______ algorithm, the disk arm starts at one end of the disk and moves toward the other end, servicing requests till the other end of the disk. At the other end, the direction is reversed and servicing continues.

LOOK

SCAN

C-SCAN

C-LOCK

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Introduction to Operating System

Types

Services

Structures

Processes

Threads

CPU Scheduling

Process Synchronization

Memory Management

Storage Management

Input Output Systems

Networking

Distributed Operating System

Protection and Security

Unix

Linux

MS Windows

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Operating Systems Overview

Process Management

Finding and Processing Files

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