Tag: operating systems

Questions Related to operating systems

What is SELINUX?

technology operating systems

  1. Firewall

  2. Remote support

  3. Access rules

  4. Virus Scanner

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Correct Option: C

What is the use of /etc/nsswitch.conf file?

technology operating systems

  1. DNS resolution

  2. Name resolution priority

  3. Host configuration.

  4. backup Configuration

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Correct Option: B

How to change the port number of a service

technology operating systems

  1. Use nmap command

  2. Modify the port number in /etc/hosts file.

  3. Modify the port number in /etc/services file

  4. Modify the port number in /etc/resolv.conf file

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Correct Option: C

What is MX record?

technology operating systems

  1. Dynamic DNS

  2. Root DNS

  3. CNAME

  4. Mail exchanger

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Correct Option: D

Command for checking kernel parameters

technology operating systems

  1. ngroups

  2. Sysconfig

  3. adb -k

  4. tee

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Correct Option: C

How to block unknown senders in mail services

technology operating systems

  1. use access file

  2. use mail file

  3. Configure single domain

  4. use netstat command

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Correct Option: A

how to convert shell script to binary file

technology operating systems

  1. using java

  2. shc

  3. Change the permission of script.

  4. using VB

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Correct Option: B

what is the command used for recovering deleted files?

technology operating systems

  1. find

  2. dump

  3. get

  4. grep

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Correct Option: D

Command for listing local files after connecting to FTP machine
technology operating systems

  1. ls -lrt

  2. ls

  3. !dir

  4. dir /p

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Correct Option: C

What is soft mount?
technology operating systems

  1. NFS file system with minimum access

  2. NFS access for root

  3. NFS file system without access

  4. No wait time for NFS mount.

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Correct Option: D