Tag: operating systems

Questions Related to operating systems

Which directory under the root contains the information on devices
technology operating systems

  1. /usr/bin

  2. /usr/sbin

  3. /usr/peripherals/dev

  4. /etc/dev

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Correct Option: D

For some file the access permissions are modified to 764. Which of the following
technology operating systems

  1. Every one can read, group can execute only and the owner can read and write

  2. Every one can read and write, but owner alone can execute

  3. Every one can read, group including owner can write, owner alone can execute

  4. None

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Correct Option: C

What is a system call()
technology operating systems

  1. A request by the users to access kernel functions

  2. A request by kernel to the device

  3. A request by the device to kernel

  4. None

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Correct Option: A

What is SPOOL?

technology operating systems

  1. A mechanism to connect to printer, keyboard and monitor in linux

  2. A mechanism to share printer across users

  3. A request made by the device to linux kernel

  4. None

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Correct Option: B

How to sort a file in decending order
technology operating systems

  1. sort -d

  2. sort

  3. sort -r

  4. sort -R

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Correct Option: C

What is a named pipe?
technology operating systems

  1. A Pipe used by kernel to access device

  2. A pipe to be used by the user to access device

  3. An abstraction to provide support for inter process communication

  4. A device

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Correct Option: C

Count the number of errors in the statement if [password = password1] then echo password else password

technology operating systems

  1. 0

  2. 4

  3. 1

  4. 2

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Correct Option: B

What is the purpose of sync command?
technology operating systems

  1. To synchronize user applications

  2. To synchronize keyboard and monitor

  3. To synchornize disk buffers

  4. To syschronize main memory and cache memory

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Correct Option: C

User's with user id as 0 (Zero) are
technology operating systems

  1. Printer users

  2. Not allowed to login using rlogin/ssh

  3. root users

  4. User id cannot be 0

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Correct Option: C

What does the command umask 123 do?
technology operating systems

  1. It sets file owner permissions to read and write

  2. It sets the permissions of other users to read

  3. It sets group permissions to read and execute

  4. All of them

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Correct Option: D