Question Discussion & Solution

MCQ

Serializable schedules are ones where ____________

concurrent execution of transactions is equivalent to the transactions executed serially

the transactions can be carried out one after the other

a valid result occurs after execution transactions

none of the mentioned

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MCQ

The shrinking phase is a phase in which?

A transaction may obtain locks, but does not release any

A transaction may obtain locks, and releases a few or all of them

A transaction may release locks, but does not obtain any new locks

A transaction may release locks, and does obtain new locks

Discussion

MCQ

For an effective operating system, when to check for deadlock?

every time a resource request is made

at fixed time intervals

every time a resource request is made at fixed time intervals

none of the mentioned

Discussion

MCQ

Every time a request for allocation cannot be granted immediately, the detection algorithm is invoked. This will help identify ____________

the set of processes that have been deadlocked

the set of processes in the deadlock queue

the specific process that caused the deadlock

all of the mentioned

Discussion

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

The code that changes the value of the semaphore is ____________

remainder section code

non-critical section code

critical section code

none of the mentioned

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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

Report Error

Community Discussion

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Report Error

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