Tata Communications Linux System Administrator Interview Questions and Answers

Q1. This was Tech 1 round, linux basic commands were asked. Below are some of the topics- monitoring disk utilization File system creation User management Ownership and permissions
Ans. It was an easy round for me, if you are working as linux admin you can easily go through that. Monitoring - top, sar Disk utilization - du
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Q2. Define the steps of File system creation.
Ans. 
Steps for file system creation involve partitioning, formatting, and mounting the file system.
• Partition the disk using tools like fdisk or parted

• Format the partition with a file system like ext4 or xfs

• Create a mount point directory

• Mount the file system to the mount point

• Update /etc/fstab to automatically mount the file system on boot
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Q3. Why tcpdump is used?
Ans. 
tcpdump is used for network troubleshooting and analysis by capturing and analyzing network packets.
• Captures network packets for analysis

• Helps in troubleshooting network issues

• Can be used to monitor network traffic

• Provides detailed information about network communication

• Useful for security analysis and monitoring
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Q4. How we can transfer file from one server to other server?
Ans. 
Files can be transferred from one server to another using tools like SCP, SFTP, or rsync.
• Use SCP (Secure Copy Protocol) to securely transfer files between servers. Example: scp file.txt user@server2:/path/to/directory

• Use SFTP (SSH File Transfer Protocol) for interactive file transfers. Example: sftp user@server2

• Use rsync for efficient synchronization of files between servers. Example: rsync -avz file.txt user@server2:/
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Q5. How you can schedule a job regularly?
Ans. 
You can schedule a job regularly using cron jobs in Linux.
• Use the crontab command to edit the cron table

• Specify the schedule using the appropriate syntax (minute, hour, day of month, month, day of week)

• For example, to schedule a job to run every day at 3am, you would add the following line to the cron table: 0 3 * * * /path/to/command
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Q6. What is Hard link and soft link?
Ans. 
Hard links and soft links are two types of links used in Unix-like operating systems to create shortcuts to files.
• Hard links are direct pointers to the inode of a file, while soft links are indirect pointers to the file name.

• Hard links cannot link directories or files on different filesystems, while soft links can.

• If the original file is deleted, hard links will still point to the data, while soft links will be broken.

• ...read more
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Q1. What is /mnt and fstab?
Ans. 
The /mnt directory is used as a mount point for temporary mounting of filesystems, and fstab is a configuration file that lists filesystems to be mounted at boot.
• The /mnt directory is commonly used for temporarily mounting external storage devices or network shares.

• The fstab file is located at /etc/fstab and contains information about filesystems to be mounted at boot time.

• Entries in fstab include the device to mount, ...read more
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Q2. You are unable to unmount a file system, what will you do?
Ans. 
Check for any processes or open files using the file system, then force unmount if necessary.
• Check for any processes or applications currently using the file system with 'lsof' command

• Kill any processes that are using the file system if necessary

• Try unmounting the file system again using 'umount -l' to force unmount if needed
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Q3. What do you understand by NFS?
Ans. 
NFS stands for Network File System, a distributed file system protocol that allows a user on a client computer to access files over a network.
• NFS allows a user to access files on a remote server as if they were local files.

• It is commonly used in Unix and Linux environments for sharing files and directories.

• NFS uses RPC (Remote Procedure Call) to communicate between the client and server.

• It provides centralized storage ...read more
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Q4. Define Boot process.
Ans. 
Boot process is the sequence of steps that occur when a computer system is starting up.
• BIOS/UEFI initialization

• Loading the bootloader

• Loading the kernel

• Init process starts

• Launching user space processes
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Q5. Disk is assigned from the storage/VMware nut it is not visible for fs expansion, what will you do?
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Q1. In this round, most of the questions from the Resume. Questions related to background, academics, feasibility.
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Q2. Behavioral questions and your stickness to the organisation is checked at this level.
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Q1. Linux Characteristics
Ans. 
Linux is an open-source operating system known for its stability, security, and flexibility.
• Linux is free and open-source software

• It is highly customizable and can be modified to suit specific needs

• Linux is known for its stability and security

• It supports a wide range of hardware and software

• Linux has a command-line interface, but also has graphical user interfaces like GNOME and KDE
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Q2. Git related questions
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Q1. My Sql based questions
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Q2. Networking monetizing tools and debugging
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Q1. Basic to advance linux related questions. There were 2 technical rounds, and final HR round.
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Q1. Technical interview and communication and your aspirations is asked
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Q1. Final round to discuss salary
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Q1. About user management
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Q2. About lvm , Apache, nagios ,os and package installation etc
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Q1. About iscsi , cluster
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Q2. About Linux commands
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Q1. HR tell me about company environment
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Q2. And salary discussion
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This test knows about our communication skills, solving ability, grammar, mathematical ability, reading skills, listening skills and logical ability

Q1. What is OOPS concept?
Ans. 
OOPS (Object-Oriented Programming) concept is a programming paradigm based on the concept of objects, which can contain data and code.
• OOPS focuses on creating reusable code and organizing it into objects

• Key principles include encapsulation, inheritance, polymorphism, and abstraction

• Encapsulation involves bundling data and methods that operate on the data into a single unit

• Inheritance allows one class to inherit propert...read more
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At first they want to know your thought process only.

It was simple only basic Questions are asked in that.

Q1. Where do you see yourself in 5 years?
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Q2. Where do see urself 5 years down the line
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