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Cognizant Linux Administrator Interview Questions, Process, and Tips
Top Cognizant Linux Administrator Interview Questions and Answers
- Q1. What is LVM, Explain LVM Architecture, What is Raid, What is the booting process of RHEL, How to manage failed unmount or mount, What are the issues you have faced in wor ...read more
- Q2. How to check Kernel and OS Version, How to change file permissions, Whar are the default permissions of few files, In which file user id and password stored, Network conf ...read more
- Q3. Where do we store syslog file in linux and what are the different type of filesystems in linux
Cognizant Linux Administrator Interview Experiences
7 interviews found
Anonymous
Selected
I applied via Referral and was interviewed before Sep 2022. There were 2 interview rounds.
(2 Questions)
- Q1. How to check Kernel and OS Version, How to change file permissions, Whar are the default permissions of few files, In which file user id and password stored, Network configuration stored in which file, How...
- Ans.
To check Kernel and OS Version, change file permissions, view default permissions of files, locate user id and password file, find network configuration file, and filter keywords.
To check Kernel and OS Version: Use 'uname -a' command
To change file permissions: Use 'chmod' command followed by permission code and file name
Default permissions of few files: For example, /etc/passwd has 644 permissions
User id and password s...
- Q2. What is LVM, Explain LVM Architecture, What is Raid, What is the booting process of RHEL, How to manage failed unmount or mount, What are the issues you have faced in working with Linux Servers, What is sp...
- Ans.
LVM is Logical Volume Manager used for managing disk space, RAID is Redundant Array of Independent Disks for data protection, RHEL boot process involves BIOS, GRUB, kernel loading, and init process.
LVM allows for dynamic resizing of logical volumes without downtime.
RAID combines multiple disks for data redundancy or performance improvement.
RHEL boot process involves BIOS POST, GRUB bootloader, kernel loading, and init ...
Interview Preparation Tips
Skills evaluated in this interview
(2 Questions)
- Q1. Baasics of Linux
- Ans.
Linux is an open-source operating system based on Unix, known for its stability, security, and flexibility.
Linux is open-source, meaning its source code is freely available for anyone to use, modify, and distribute.
Linux is based on Unix, which is a powerful and stable operating system used in servers and mainframes.
Linux is known for its security features, such as user permissions and access control.
Linux is highly cu...
- Q2. Shel script and commands
Skills evaluated in this interview
I applied via Company Website and was interviewed in Dec 2022. There were 2 interview rounds.
(2 Questions)
- Q1. What is lun and how to extend and reduce them
- Ans.
LUN stands for Logical Unit Number, used to represent a logical volume on a storage area network (SAN).
LUNs are virtual disks created on a SAN storage system.
To extend a LUN, you can use tools like LVM (Logical Volume Manager) to add more physical storage to the existing LUN.
To reduce a LUN, you can shrink the filesystem on the LUN and then shrink the LUN itself using storage management tools.
- Q2. Where do we store syslog file in linux and what are the different type of filesystems in linux
- Ans.
Syslog files are stored in /var/log directory. Different types of filesystems in Linux include ext4, xfs, btrfs, and more.
/var/log directory is the default location for storing syslog files
Different types of filesystems in Linux include ext4, xfs, btrfs, etc.
ext4 is the default filesystem for most Linux distributions
xfs is commonly used for large-scale storage systems
btrfs is known for its advanced features like snapsh
Skills evaluated in this interview
What people are saying about Cognizant
I was interviewed in Oct 2022.
I will do the Assignment for the topics are the
(2 Questions)
- Q1. What is linux , crontab
- Ans.
Linux is an open-source operating system based on Unix. Crontab is a tool used to schedule tasks in Linux.
Linux is highly customizable and widely used in servers and supercomputers.
Crontab allows users to schedule tasks to run automatically at specified times.
Examples of tasks that can be scheduled with crontab include backups, updates, and system maintenance.
Crontab uses a specific syntax to specify the time and frequ...
- Q2. Booting loading lvm
- Ans.
Booting with LVM involves loading the LVM module and activating the logical volumes.
Install LVM package during OS installation
Create physical volumes and volume groups
Create logical volumes and file systems
Modify /etc/fstab to mount logical volumes at boot
Update initramfs to include LVM module
Activate logical volumes during boot process
Interview Preparation Tips
Skills evaluated in this interview
Cognizant interview questions for designations
I applied via Company Website and was interviewed in Jan 2022. There were 2 interview rounds.
(1 Question)
- Q1. What is Linux administrator
- Ans.
A Linux administrator is responsible for managing and maintaining Linux-based systems.
Installs, configures, and updates Linux operating systems and software
Monitors system performance and troubleshoots issues
Manages user accounts and permissions
Implements security measures to protect systems and data
Automates tasks using scripting languages like Bash or Python
Interview Preparation Tips
Skills evaluated in this interview
Get interview-ready with Top Cognizant Interview Questions
I applied via Naukri.com and was interviewed in Aug 2021. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. Be strong with technical and present the same. You will got job
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Nov 2019. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. I was called for the interview to the location and the organizers didn't even respond to my queries like where do I find my person of contact.After 1.5 hours of waiting,they asked for our resume and follow...
Interview Preparation Tips
If you dont want to interview a person,then at least dont call them to the venue.
Interview questions from similar companies
I applied via Naukri.com and was interviewed in Sep 2024. There were 2 interview rounds.
(3 Questions)
- Q1. If a server patched with new kernel update after reboot server came up with old kernel only. How will you troubleshoot it ?
- Ans.
To troubleshoot a server that booted up with the old kernel after a new kernel update, check the bootloader configuration, verify the kernel installation, and review the update process.
Check the bootloader configuration to ensure it is pointing to the correct kernel version.
Verify the kernel installation to see if the new kernel was successfully installed.
Review the update process to identify any errors or issues that ...
- Q2. What are the various commands to check the CPU , Memory utilization in Linux server ?
- Ans.
Various commands to check CPU and Memory utilization in Linux server.
To check CPU utilization: top, mpstat, sar
To check Memory utilization: free, vmstat, sar -r
- Q3. How will you create and add new disk to the system using LVM ? Write the commands of the process.
- Ans.
To add a new disk to the system using LVM, you need to initialize the disk, create a physical volume, extend the volume group, and finally extend the logical volume.
Initialize the disk using fdisk or parted command
Create a physical volume using pvcreate command
Extend the volume group using vgextend command
Extend the logical volume using lvextend command
Resize the filesystem using resize2fs or xfs_growfs command
(2 Questions)
- Q1. Tell me about yourself
- Ans.
Experienced Linux Administrator with a passion for troubleshooting and optimizing systems.
Over 5 years of experience managing Linux servers in a corporate environment
Skilled in shell scripting, server configuration, and system monitoring tools like Nagios
Strong problem-solving skills and ability to work well under pressure
Certified in Red Hat Enterprise Linux (RHCE)
Passionate about staying up-to-date with the latest te
- Q2. Can you let us know the skills other than mentioned skills in resume?
- Ans.
Some additional skills I possess include scripting languages, troubleshooting abilities, and strong communication skills.
Proficiency in scripting languages such as Python, Bash, or Perl can be beneficial for automating tasks and improving efficiency.
Strong troubleshooting abilities are essential for quickly identifying and resolving issues that may arise in a Linux environment.
Effective communication skills are importa...
Skills evaluated in this interview
Yashwant Rathore
(5 Questions)
- Q1. What is lvm how it is work?
- Ans.
LVM stands for Logical Volume Manager, a tool used to manage disk storage in Linux systems.
LVM allows for dynamic resizing of logical volumes without downtime.
It consists of physical volumes, volume groups, and logical volumes.
Commands like pvcreate, vgcreate, lvcreate are used to create and manage LVM.
LVM provides flexibility in managing storage space by allowing logical volumes to span multiple physical disks.
- Q2. How to mount nfs?
- Ans.
To mount NFS, use the 'mount' command with the NFS server IP address and the mount point on the local machine.
Use the 'mount' command followed by the NFS server IP address and the mount point on the local machine
For example: sudo mount 192.168.1.100:/shared_folder /mnt/nfs_share
Ensure that the NFS server is properly configured and accessible from the local machine
- Q3. How to do patching.
- Ans.
Patching involves applying updates to software to fix vulnerabilities and improve performance.
Identify the software that needs to be patched
Download the appropriate patches from the vendor's website
Test the patches in a non-production environment before applying them to production systems
Schedule downtime for applying patches to minimize disruption
Document the patching process for future reference
- Q4. How to rollback package
- Ans.
To rollback a package, use package manager to uninstall current version and install previous version.
Use package manager to uninstall current version of the package
Install the previous version of the package using package manager
Check for any dependencies that may need to be rolled back as well
- Q5. How to remove older kernel
- Ans.
To remove older kernels in Linux, use package management tools like apt or yum.
Use 'apt autoremove' command in Debian-based systems to remove old kernels
Use 'yum remove
' command in Red Hat-based systems to remove old kernels Check available kernels with 'uname -r' command before removing
Skills evaluated in this interview
I applied via Approached by Company and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. How can I grant SFTP access exclusively to the user David?
- Ans.
Grant SFTP access exclusively to user David
Create a new group specifically for David, e.g. 'davidgroup'
Set the ChrootDirectory in the SSH configuration file to restrict David's access to a specific directory
Add David to the 'davidgroup' and configure the necessary permissions for SFTP access
- Q2. How can a user be locked out after 6 unsuccessful password attempts for a duration of 30 minutes?
- Ans.
To lock a user out after 6 unsuccessful password attempts for 30 minutes, modify the PAM configuration file.
Edit the PAM configuration file (/etc/pam.d/common-auth) to include the 'pam_tally2' module.
Set the 'deny' option in the 'pam_tally2' module to lock the user out after 6 failed attempts.
Specify the 'unlock_time' option in the 'pam_tally2' module to set the duration of the lockout period to 30 minutes.
Example: aut
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Cognizant Linux Administrator Interview Process
based on 3 interviews
2 Interview rounds
- Resume Shortlist Round
- Technical Round
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Cognizant Linux Administrator Reviews and Ratings
based on 8 reviews
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