70 Best Operating System Questions and Answers (Q&A) - ProProfs Discuss

What is the "critical region" in an Operating System (OS)?

M. Krasinski, Content Writer
Answered: Oct 24, 2018

There are times when people would be pressing to open one program several times when the program can only be opened one at a time. This is the critical period because the OS does not allow this...Read More

4 Answers

2975 views

/dev / tty"? " href="https://www.proprofsdiscuss.com/q/1165657/the-command--echo-welcome-gtdevtty">What will be the result of the command "echo welcome > /dev / tty"?

E. Barnes, Professional Gamer
Answered: Feb 26, 2019

When you enter the the command "echo welcome > /dev / tty," the result will be echoes welcome only in the terminal in which it is runned. Another result when you enter this command would be...Read More

2 Answers

2827 views

What is the file extension of flash files?

Robert Hazlewood, Senior Executive
Answered: Dec 26, 2018

The file extension of a flash file is FLA but this option is not available in the question above. Flash file is the master document for a flash project; this file can only be opened with...Read More

3 Answers

2275 views

How will you assign the value of variable var2 to var1?

G. Woods, College student
Answered: Sep 24, 2020

You will assign the value of variable var2 to var 1 in this mode; Var1=$var2
A variable is defined by merely assigning a value to a name making use of the = operator. A variable name is a...Read More

2 Answers

1965 views

Why Unix is so popular?

AkshayMishra
Answered: Sep 26, 2023

Once created, the data marts will keep on being updated from the data warehouse at periodic times

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1 Answer

1315 views

What is the command to find the differences in the lines containing "2011" between the files a1.txt and a2.txt?

H.Jennifer
Answered: Apr 23, 2018

Diff a1.txt a2.txt | grep 2011.
The name, “grep”, derives from the command used to perform a similar operation, using the Unix/Linux text editor ed:g/re/p. When you search...Read More

3 Answers

901 views

What is an example of single programming operating system?

John Smith
Answered: Sep 26, 2023

Ms-dos

1 Answer

837 views

What is used in the operating system (OS) to separate mechanism from policy?

L.Steven
Answered: Jan 07, 2018

This is a specific design principle in computer science. It implements that the mechanisms should be separate from the policies, so as to not dictate them. Most commonly, this is incorporated in...Read More

3 Answers

827 views

What is the function of short-term scheduler in OS?

Gursharan_tatla
Answered: Sep 26, 2023

Selects a process from ready queue and assigns it to the CPU. As the name itself suggests "short-term scheduler" it helps to prevent a logjam and assists CPU in getting the freshly prepar...Read More

1 Answer

774 views

Which of the Mac OS, Windows Explorer, Red Hat or Solaris is not an Operating System?

Ken Wilson, Marketing Analyst
Answered: Dec 04, 2018

Windows Explorer is not an operating system. Explorer is the technical name for the file folder icon that you click to bring up a list of all the documents on your computer, and every operating...Read More

2 Answers

772 views

Which Operating System Interface (OSI) layer is associated with the acknowledgement of transmissions, sequencing, and flow control across a network?

John Smith
Answered: Sep 26, 2023

The transport layer (layer 4) defines several functions, including the choice of protocols. The most important layer 4 functions are error recovery and flow control. The transport layer may...Read More

2 Answers

763 views

What is the primary purpose of an operating system?

John Smith
Answered: Sep 26, 2023

To make the most efficient use of the computer hardware

1 Answer

760 views

What does $? return in Schell scripting?

G.Kenneth
Answered: Jan 24, 2018

Shell scripts are computer programs. It is run by Unix Shell. Shell scripts are capable of making shortcuts. They can also do batch jobs and generalization. At the beginning of the development of...Read More

3 Answers

665 views

What is used in operating system to separate mechanism from policy?

Wyatt Williams
Answered: Sep 26, 2023

Two level implementation

1 Answer

618 views

Which commands will set the permissions on file textfile to read and write for the owner, read for the group, and nothing for everyone else?

John Smith
Answered: Sep 26, 2023

Chmod 046 textfile

1 Answer

581 views

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