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MCQ

Which of the following command is used to go to home directory?

cd..

cd/

cd HOME.

None of the above

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Which of the following command addresses all users who are currently hooked on?

write

mail

wall

mesg

None of the above

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Which command is used to display a file contents in octal form?

oct

None of the above

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What are the characteristics of transaction semantics?

Suitable for applications that are concerned about coherence of data

The users of this model are interested in the atomicity property for their transaction

Easy to implement in a single processor system

Write back enhances access performance

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Which command is used to make all files and sub-directories in the directory (progs) executable by all users?

chmod -R a+x progs

chmod -R 222 progs

chmod -1 a+x progs

chmod -x a+x progs

None of the above

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MCQ

Which command is used with file named 'note' to remove the executable permission from the user and assign read permission to the group and others?

chmod u-x, go+r note

chmod go+r, u+x note

chmod g-x, uo+r note

chmod go+x, u-x note

None of the above

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Introduction to Operating System

Types

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Structures

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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

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