To ensure no preemption, if a process is holding some resour...

MCQ

To ensure no preemption, if a process is holding some resources and requests another resource that cannot be immediately allocated to it ____________

then the process waits for the resources be allocated to it

the process keeps sending requests until the resource is allocated to it

the process resumes execution without the resource being allocated to it

then all resources currently being held are preempted

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MCQ

The following pair of processes share a common variable X.

Process A
int Y;
A1: Y = X*2;
A2: X = Y;   
 
Process B
int Z;
B1: Z = X+1;
B2: X = Z;

X is set to 5 before either process begins execution. As usual, statements within a process are executed sequentially, but statements in process A may execute in any order with respect to statements in process B. How many different values of X are possible after both processes finish executing?

two

three

four

eight

Discussion

MCQ

A system has 12 magnetic tape drives and 3 processes : P0, P1, and P2. Process P0 requires 10 tape drives, P1 requires 4 and P2 requires 9 tape drives.

Process    
P0            
P1                             
P2                             
 
Maximum needs (process-wise: P0 through P2 top to bottom)    
10             
4   
9
 
Currently allocated (process-wise)
5
2
2

Which of the following sequence is a safe sequence?

P0, P1, P2

P1, P2, P0

P2, P0, P1

P1, P0, P2

Discussion

MCQ

A problem encountered in multitasking when a process is perpetually denied necessary resources is called ____________

deadlock

starvation

inversion

aging

Discussion

MCQ

The system periodically performs checkpoints that consists of the following operation(s) ____________

Putting all the log records currently in main memory onto stable storage

putting all modified data residing in main memory onto stable storage

putting a log record onto stable storage

all of the mentioned

Discussion

MCQ

In the write ahead logging a _____________ is maintained.

a memory

a system

a disk

a log record

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Medical

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category More Operating System Topics

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

Mixed

Operating Systems Overview

Process Management

Finding and Processing Files

File Management

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