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operating systems Online Quiz - 60

Description: operating systems Online Quiz - 60
Number of Questions: 20
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Tags: operating systems
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To unhide the selected row
technology operating systems

  1. CTRL + SHIFT + )

  2. CTRL + SHIFT + (

  3. CTRL + (

  4. CTRL + U

Show answer
Correct Option: B

To apply the outline border to selected cells

technology operating systems

  1. CTRL + SHIFT + _

  2. CTRL + &

  3. CTRL + SHIFT + &

  4. CTRL + B

Show answer
Correct Option: C

To remove the outline border to selected cells
technology operating systems

  1. CTRL + SHIFT + &

  2. CTRL + SHIFT + _

  3. CTRL + &

  4. CTRL + B

Show answer
Correct Option: B

To insert a new worksheet

technology operating systems

  1. CTRL + N

  2. SHIFT + F11

  3. CTRL + W

  4. SHIFT + W

Show answer
Correct Option: B

_____________ is the command that writes the last 10 lines of a file to the screen.

technology operating systems

  1. head

  2. last

  3. tail

  4. cat

Show answer
Correct Option: C

Which command is used to change your password?

technology operating systems

  1. pwd

  2. Passwd

  3. password

  4. user

Show answer
Correct Option: B

Which command will display a calendar?

technology operating systems

  1. ls

  2. cat

  3. grep

  4. cal

Show answer
Correct Option: D

Which command can be used to display the contents of a file on the screen?

technology operating systems

  1. dir

  2. cp

  3. cal

  4. cat

Show answer
Correct Option: D

Which command would you use to create a sub-directory in your home directory?
technology operating systems

  1. dir

  2. rmdir

  3. cd

  4. mkdir

Show answer
Correct Option: D

_____________ is the command that writes the first 10 lines of a file to the screen.

technology operating systems

  1. whereami

  2. head

  3. dir

  4. ls

Show answer
Correct Option: B

The ________ command will display the absolute pathname for the directory that you are wokring in.

technology operating systems

  1. pwd

  2. cwd

  3. dir

  4. ls

Show answer
Correct Option: A

wc command will report mispelled words.
technology operating systems

  1. True

  2. False

Show answer
Correct Option: A

Which command allows you to determine if a host is connected to the Internet?
technology operating systems

  1. ls

  2. dir

  3. ping

  4. host

Show answer
Correct Option: C

The file assign4.html has permissions set as rwxrwxrwx

technology operating systems

  1. The file is really a directory and was named incorrectly.

  2. It is impossible for an html file to have permissions set that way.

  3. Everyone can read, write, and execute the file.

  4. The file can not be viewed on the WWW.

Show answer
Correct Option: C

AI Explanation

To answer this question, we need to understand the permissions set for files in a Linux or Unix-like operating system.

In Unix-based systems, file permissions are represented by a series of 10 characters. The first character represents the file type, and the remaining nine characters represent the permissions for the file's owner, group, and others.

The permissions are represented by three sets of rwx (read, write, execute) flags, corresponding to the owner, group, and others.

In this case, the permissions for the file "assign4.html" are set as "rwxrwxrwx". Let's break it down:

  • "rwx" for the owner: The owner of the file has read, write, and execute permissions.
  • "rwx" for the group: The group that the file belongs to also has read, write, and execute permissions.
  • "rwx" for others: All other users on the system also have read, write, and execute permissions.

Therefore, option C is correct: Everyone can read, write, and execute the file. The permissions are set to allow full access to the file for all users on the system.

What is the use of INITIALIZE verb?
technology operating systems

  1. Used to initialize some value to a variable

  2. Numeric values are set to zero, alphabetic and alphanumberic variables are set to spaces.

  3. All variables are set to spaces.

  4. None of the above

Show answer
Correct Option: B

When a thread blocks on I/O, which of the following are true?
technology operating systems

  1. The thread enters the ready state

  2. The thread enters the dead state

  3. No other thread may perform I/O

  4. The thread enters the waiting state

Show answer
Correct Option: D

What is the command used for redirecting the standard error (stderr) to a file?
technology operating systems

  2. >>

  3. 2>

  4. <2

Show answer
Correct Option: C

What is the result of doing the following? date >> file

technology operating systems

  1. The date output is redirected to the file.

  2. The date output is redirected and appended to the end of the file.

  3. The date output is redirected and appended to the beginning of the file.

  4. None of the above

Show answer
Correct Option: B

Which of the following will return the exit code of the last executed command?
technology operating systems

  1. $%

  2. $#

  3. $?

  4. $!

Show answer
Correct Option: C

What is the command used for changing the scope of a shell variable to a global variable?
technology operating systems

  1. global

  2. shell

  3. export

  4. None of the above

Show answer
Correct Option: C
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