System Administrator

300+ System Administrator Interview Questions and Answers

Updated 28 Feb 2025
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Q51. What are RJ45 and RJ11 connectors?

Ans.

RJ45 and RJ11 connectors are types of connectors used in networking and telecommunications.

  • RJ45 connectors are used for Ethernet connections and have 8 pins.

  • RJ11 connectors are used for telephone connections and have 6 pins.

  • RJ45 connectors are larger in size compared to RJ11 connectors.

  • RJ45 connectors are commonly used in home and office networks.

  • RJ11 connectors are commonly used for landline telephones and DSL connections.

Q52. What is netcool architecture and explain each component involve and data flow.?

Ans.

Netcool architecture is a system used for event management and monitoring. It consists of several components that work together to process and analyze data.

  • Netcool is a software suite developed by IBM for event management and monitoring.

  • The architecture includes various components such as probes, gateways, and databases.

  • Probes collect event data from different sources and send it to the Netcool system.

  • Gateways receive event data from probes and perform data normalization and ...read more

Q53. What is the procedure for creating group policies and user accounts?

Ans.

Creating group policies and user accounts involves defining settings and permissions for groups and individuals.

  • Access Group Policy Management console

  • Create new Group Policy Object (GPO)

  • Define settings and permissions within GPO

  • Link GPO to specific organizational units (OU)

  • Create user accounts in Active Directory Users and Computers console

  • Assign user accounts to appropriate groups for access control

Q54. What is vSAN,vSphere,vCenterServer,vRops.

Ans.

vSAN is a software-defined storage solution, vSphere is a virtualization platform, vCenter Server is a centralized management tool, and vRops is a performance monitoring tool.

  • vSAN is used to create a shared storage pool from local storage devices

  • vSphere allows multiple virtual machines to run on a single physical machine

  • vCenter Server provides a centralized management interface for vSphere

  • vRops monitors the performance and health of virtualized environments

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Q55. What you will do if you encounter No internet in system?

Ans.

I would troubleshoot the issue by checking network connections, restarting the router, and contacting the ISP if necessary.

  • Check network connections to ensure cables are properly connected

  • Restart the router to refresh the connection

  • Contact the Internet Service Provider (ISP) to check for any outages or issues

  • Run network diagnostics to identify the problem

Q56. What Permission applied on types

Ans.

Permissions applied on types determine the level of access and actions that can be performed on them.

  • Permissions can be applied to various types such as files, folders, databases, etc.

  • Examples of permissions include read, write, execute, delete, modify, etc.

  • Permissions can be granted to individual users or groups of users.

  • Permissions can be inherited from parent objects or explicitly set on individual objects.

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Q57. How to give permission to directory and file?

Ans.

To give permission to a directory and file, you can use the chmod command in Linux or the Set-ACL command in Windows.

  • In Linux, use the chmod command followed by the permission code and the directory/file name.

  • In Windows, use the Set-ACL command followed by the directory/file name and the desired permissions.

  • Permission codes in Linux include read (r), write (w), and execute (x) for owner, group, and others.

  • In Windows, permissions can be granted to users or groups with specific...read more

Q58. 1. What Dns dhcp, server, ad,? 2. How to do Printer configuration 3. How to do License configuration 4. What type Server installation 5. Windows basic

Ans.

Questions related to DNS, DHCP, server installation, printer and license configuration, and Windows basics for a System Administrator role.

  • DNS: Domain Name System translates domain names to IP addresses.

  • DHCP: Dynamic Host Configuration Protocol assigns IP addresses to devices on a network.

  • Server installation: Different types of server installations include file servers, web servers, database servers, etc.

  • Printer configuration: Install printer drivers, connect printer to netwo...read more

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Q59. How do you resolve windows update not updating issue?

Ans.

Windows update not updating issue can be resolved by checking for updates, restarting the computer, running troubleshooter, and resetting Windows update components.

  • Check for updates manually

  • Restart the computer

  • Run Windows update troubleshooter

  • Reset Windows update components

Q60. Outlook send/receive not working, how to resolve it?

Ans.

Check network connection, restart Outlook, check email account settings.

  • Ensure network connection is stable and working

  • Restart Outlook and try again

  • Check email account settings, including server name and port numbers

  • Check for any updates or patches for Outlook

  • Disable any antivirus or firewall temporarily to see if it's causing the issue

Q61. What is virtualization?

Ans.

Virtualization is the creation of a virtual version of something, such as an operating system, a server, a storage device, or network resources.

  • Virtualization allows multiple operating systems to run on a single physical machine

  • It enables better utilization of hardware resources

  • Examples include VMware, Hyper-V, VirtualBox, and KVM

  • Virtualization can be used for server consolidation, testing and development, disaster recovery, and cloud computing

Q62. What will you do if vm machine is in hung state

Ans.

I will try to identify the cause of the hang and take appropriate action to resolve it.

  • Check if the VM is responding to pings or console access

  • Check the VM's resource utilization and logs for any errors

  • Try to gracefully shut down the VM using the hypervisor's management tools

  • If graceful shutdown fails, force power off the VM and restart it

  • Investigate the cause of the hang and take steps to prevent it from happening again

Q63. Define oops concept , print an array in reverse order, what is os?

Ans.

Oops concept is a programming paradigm that focuses on objects and their interactions. Printing an array in reverse order involves iterating through the array and printing each element in reverse order. OS stands for Operating System.

  • Oops concept involves encapsulation, inheritance, and polymorphism.

  • To print an array in reverse order, start from the last element and iterate backwards.

  • Operating System is a software that manages computer hardware and software resources.

  • Example:...read more

Q64. What you will do if client reports website is down

Ans.

I will immediately check the server and website logs to identify the issue and take necessary actions to resolve it.

  • Check server and website logs

  • Identify the issue

  • Take necessary actions to resolve it

  • Communicate with the client about the status and progress of the issue

  • Ensure preventive measures are in place to avoid similar issues in the future

Q65. How to check your current path/directory you are working in?

Ans.

To check the current path/directory, use the 'pwd' command in Unix/Linux or 'cd' command in Windows.

  • In Unix/Linux, type 'pwd' and press Enter

  • In Windows, type 'cd' and press Enter

Q66. What is procedure the patching your organization?

Ans.

Our organization follows a standardized patching procedure to ensure security and stability.

  • We schedule regular patching windows to minimize disruption to users.

  • We prioritize critical patches and test them in a non-production environment before deploying.

  • We document all patches applied and maintain a record of patch history.

  • We monitor systems for any issues or errors after patching.

  • We have a rollback plan in case of any unforeseen issues.

  • We communicate with stakeholders about...read more

Q67. what is VMware ESXi? Types of hypervisors?

Ans.

VMware ESXi is a type-1 hypervisor used for virtualization.

  • ESXi is a bare-metal hypervisor that runs directly on server hardware.

  • It allows multiple virtual machines to run on a single physical server.

  • ESXi is a popular choice for enterprise-level virtualization.

  • Other types of hypervisors include type-2 hypervisors like VirtualBox and VMware Workstation.

  • Another type of hypervisor is the container hypervisor, which is used for containerization.

Q68. How to check which service running on your server..?

Ans.

To check which service is running on a server, you can use various commands and tools.

  • Use the 'service' command followed by 'status' and the service name to check if a specific service is running.

  • Use the 'ps' command to list all running processes and filter by service name or process ID.

  • Use the 'netstat' command to view active network connections and associated services.

  • Use the 'systemctl' command to check the status of services managed by systemd.

  • Use the 'top' command to mon...read more

Q69. How can you take data backup

Ans.

Data backup can be taken using various methods such as cloud storage, external hard drives, and network-attached storage (NAS).

  • Cloud storage: Use services like Google Drive, Dropbox, or Amazon S3 to store data remotely.

  • External hard drives: Connect an external hard drive to the system and copy the data onto it.

  • Network-attached storage (NAS): Set up a dedicated storage device on the network to backup data from multiple systems.

  • Backup software: Utilize specialized backup softwa...read more

Q70. How we can access the firewall outside policy,

Ans.

Accessing firewall outside policy can be done through VPN or remote access.

  • Use a VPN to access the firewall outside policy

  • Set up remote access to the firewall

  • Configure the firewall to allow access from specific IP addresses

  • Use a jump server to access the firewall

  • Use a console cable to connect directly to the firewall

Q71. Who can you manage our Https sites

Ans.

A System Administrator can manage Https sites by configuring and maintaining the necessary security protocols and certificates.

  • A System Administrator should have knowledge of SSL/TLS protocols and certificates.

  • They should be able to configure web servers to support Https.

  • They should regularly update and renew SSL certificates.

  • They should monitor and troubleshoot any issues related to Https connections.

  • They should ensure proper encryption and security measures are in place.

  • Exa...read more

Q72. how to find out the computer problems

Ans.

Computer problems can be found by troubleshooting hardware, software, network, and security issues.

  • Check for error messages and logs

  • Test hardware components such as RAM, hard drive, and CPU

  • Scan for viruses and malware

  • Check network connectivity and settings

  • Update software and drivers

  • Consult user for any recent changes or issues

Q73. How do you manage interactions with multiple users simultaneously?

Ans.

I prioritize tasks based on urgency, utilize communication tools, and delegate responsibilities when necessary.

  • Prioritize tasks based on urgency to ensure critical issues are addressed first

  • Utilize communication tools such as email, chat, or ticketing systems to keep track of interactions

  • Delegate responsibilities to team members when necessary to handle multiple users simultaneously

Q74. What are the best practices for optimizing a Linux server?

Ans.

Best practices for optimizing a Linux server include regular updates, monitoring performance, optimizing disk usage, and securing the server.

  • Regularly update the server's software and packages to ensure security and performance improvements.

  • Monitor server performance using tools like top, htop, or sar to identify bottlenecks and optimize resource usage.

  • Optimize disk usage by removing unnecessary files, using disk quotas, and implementing a backup strategy.

  • Secure the server by...read more

Q75. What are the key responsibilities involved in Linux administration?

Ans.

Key responsibilities in Linux administration include managing user accounts, installing and updating software, monitoring system performance, and ensuring security.

  • Managing user accounts and permissions

  • Installing, configuring, and updating software packages

  • Monitoring system performance and troubleshooting issues

  • Ensuring system security by implementing firewalls, encryption, and regular updates

Q76. What you will do if face Internet fuluation in floor?

Ans.

I would troubleshoot the issue by checking network connections, restarting the router, and contacting the Internet service provider if necessary.

  • Check network connections to ensure all cables are properly connected

  • Restart the router to see if that resolves the issue

  • Contact the Internet service provider to report the outage and get assistance

Q77. you know about the computer Network , how many types are ?

Ans.

There are mainly three types of computer networks: LAN, WAN, and MAN.

  • Local Area Network (LAN) - connects devices within a limited area like a home, office, or school.

  • Wide Area Network (WAN) - spans over a large geographical area, connecting multiple LANs.

  • Metropolitan Area Network (MAN) - covers a city or large campus area, providing connectivity between LANs.

Q78. types of server :rack ower blade etc

Ans.

Types of servers include rack, tower, and blade servers.

  • Rack servers are designed to be mounted in a rack enclosure and are commonly used in data centers.

  • Tower servers are standalone units that resemble a desktop computer and are suitable for small businesses or remote offices.

  • Blade servers are compact units that fit into a chassis and share power, cooling, and networking resources.

  • Other types of servers include microservers, mainframes, and virtual servers.

Q79. How to rebuild the initramfs file with process?

Ans.

To rebuild initramfs file, use the 'mkinitramfs' command with appropriate options.

  • Use 'mkinitramfs' command with appropriate options to rebuild initramfs file.

  • The command can be used to create a new initramfs file or update an existing one.

  • Options like '-o' can be used to specify the output file name.

  • The '-k' option can be used to specify the kernel version for which the initramfs file is being built.

  • Example: sudo mkinitramfs -o /boot/initrd.img-4.15.0-20-generic 4.15.0-20-ge...read more

Q80. if server is not pinging how to trouble shoot?

Ans.

Check network connectivity, firewall settings, and server status.

  • Ping the server from another device to confirm network connectivity.

  • Check firewall settings to ensure the server is not being blocked.

  • Check server status to ensure it is powered on and functioning properly.

  • Check network cables and switches for any issues.

  • Try accessing the server remotely using remote desktop or SSH.

  • Check system logs for any errors or warnings related to the server.

  • Restart the server if necessary...read more

Q81. What is C++? What are the difference between C and C++?

Ans.

C++ is a programming language that is an extension of the C language, with added features like object-oriented programming.

  • C++ is an extension of the C programming language, with added features like classes, inheritance, and polymorphism.

  • C++ supports object-oriented programming, while C does not.

  • C++ allows for function overloading, while C does not.

  • C++ has a more extensive standard library compared to C.

  • C++ is considered a superset of C, meaning that C code can be compiled in...read more

Q82. How to check tha computer name of hostname in linux

Ans.

To check the computer name or hostname in Linux, you can use the 'hostname' command.

  • Use the 'hostname' command to display the current hostname of the system.

  • To change the hostname, use the 'hostnamectl set-hostname' command followed by the new hostname.

  • To view the fully qualified domain name (FQDN), use the 'hostname -f' command.

Q83. How many servers flavor?? What is AD ?? How types of AD Policy? How many place Windows SR Key store in computer? What is RAID?

Ans.

The questions are related to server administration and RAID technology.

  • There are various flavors of servers such as web servers, database servers, mail servers, etc.

  • AD stands for Active Directory, a directory service developed by Microsoft.

  • There are three types of AD policies: Local, Site, and Domain.

  • Windows SR Key is stored in the registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId.

  • RAID stands for Redundant Array of Independent Dis...read more

Q84. What is IP Adders and working and explain

Ans.

IP address is a unique numerical identifier assigned to devices connected to a network.

  • IP stands for Internet Protocol

  • It consists of a series of numbers separated by dots

  • It is used to identify devices on a network and facilitate communication

  • There are two types of IP addresses - IPv4 and IPv6

  • IPv4 addresses are 32-bit and IPv6 addresses are 128-bit

Q85. What is the latest version of windows 10?

Ans.

The latest version of Windows 10 is version 21H1.

  • Version 21H1 was released in May 2021.

  • It includes new features such as Windows Hello multicamera support and improvements to Windows Defender Application Guard.

  • It also includes security updates and bug fixes.

Q86. What is Fsmo riles in Active Directoryand what are those?

Ans.

FSMO stands for Flexible Single Master Operations. They are specialized roles in Active Directory that handle specific tasks.

  • There are 5 FSMO roles: Schema Master, Domain Naming Master, RID Master, PDC Emulator, and Infrastructure Master.

  • Each FSMO role is responsible for a specific aspect of the Active Directory environment.

  • For example, the PDC Emulator role handles password changes and time synchronization within a domain.

Q87. Server is not able to login, how to troubleshoot this

Ans.

To troubleshoot a server not able to login, check network connectivity, verify credentials, and review system logs.

  • Check network connectivity to ensure the server is reachable

  • Verify the correctness of login credentials

  • Review system logs for any error messages or indications of login failures

  • Restart the server if necessary

  • Check for any recent system updates or changes that may have caused the login issue

Q88. User is not able to login, How can troubleshoot this

Ans.

To troubleshoot a user not able to login, check for account lockouts, password issues, network connectivity, and system errors.

  • Check if the user's account is locked or disabled

  • Verify if the user's password has expired or needs to be reset

  • Ensure network connectivity is working properly

  • Check for any system errors or issues that may prevent login

  • Review system logs for any relevant error messages

  • Confirm if the user is using the correct login credentials

Q89. What is difference between Windows server 2016 and 2019

Ans.

Windows Server 2019 has improved security features, better performance, and enhanced hybrid cloud integration compared to Windows Server 2016.

  • Windows Server 2019 has improved security features such as Windows Defender Advanced Threat Protection (ATP) and Shielded Virtual Machines.

  • Windows Server 2019 offers better performance with support for up to 48TB of RAM and 256 logical processors.

  • Windows Server 2019 has enhanced hybrid cloud integration with Azure, including Azure Backu...read more

Q90. Adding network printer into multiple computers at a time

Ans.

Use Group Policy to deploy printer to multiple computers simultaneously.

  • Create a shared printer on the network

  • Create a Group Policy Object (GPO) in Active Directory

  • Under Computer Configuration, go to Policies > Windows Settings > Deployed Printers

  • Add the shared printer and configure any necessary settings

  • Link the GPO to the appropriate Organizational Unit (OU) containing the computers

  • Restart the computers or run gpupdate /force to apply the GPO

Q91. What will you do when blue screen occur during boot

Ans.

I will check for any hardware or software changes and try to boot in safe mode.

  • Check for any recent hardware or software changes

  • Try to boot in safe mode

  • Check for any error messages on the blue screen

  • If possible, try to restore the system to a previous working state

  • If all else fails, seek assistance from a higher-level support team

Q92. Tell us about the Technical Knowledge you have about Linux and Networking.

Ans.

I have extensive technical knowledge in Linux and Networking, including experience with system administration, network configuration, and troubleshooting.

  • Proficient in Linux operating systems such as Ubuntu, CentOS, and Red Hat

  • Experience with network protocols such as TCP/IP, DNS, DHCP, and VPN

  • Skilled in configuring routers, switches, firewalls, and other network devices

  • Knowledge of security practices and tools for securing networks and systems

  • Familiar with virtualization tec...read more

Q93. What is load balancing and how to implement this in your server

Ans.

Load balancing is the process of distributing network traffic across multiple servers to ensure optimal resource utilization and prevent overload.

  • Load balancing helps improve performance, reliability, and scalability of servers.

  • Common load balancing algorithms include round-robin, least connections, and IP hash.

  • Implement load balancing using hardware or software-based solutions like Nginx, HAProxy, or F5 BIG-IP.

  • Configure load balancers to distribute incoming traffic evenly am...read more

Q94. Have you ever set up the exchange server lastly

Ans.

Yes, I have set up the Exchange server in my previous job.

  • I have experience in installing and configuring Exchange server

  • I have created and managed user mailboxes

  • I have set up email policies and security measures

  • I have performed regular maintenance and updates

  • I have resolved issues related to Exchange server

  • For example, I set up Exchange server 2016 in my previous job and managed it for over 2 years

Q95. How to create administer, manage and remove features on a server or servers itself.

Ans.

To create, administer, manage, and remove features on a server, one can use various tools and techniques.

  • Use server management software like cPanel, Plesk, or Webmin to create and manage features

  • Use command-line tools like PowerShell or Terminal to administer and manage features

  • Use virtualization software like VMware or VirtualBox to create and manage virtual servers

  • Use configuration management tools like Ansible or Puppet to automate feature management

  • Remove features by unin...read more

Q96. What is vmware vsphere? What is Drs in Vmware? What is High availability in ware? What is Fault Tolerance in Vmware?

Ans.

VMware vSphere is a virtualization platform that provides virtualization, management, resource optimization, and more.

  • DRS (Distributed Resource Scheduler) in VMware is a feature that automatically balances computing workloads across a cluster of ESXi hosts.

  • High availability in VMware ensures that virtual machines are restarted on another host in case of a host failure.

  • Fault Tolerance in VMware provides continuous availability for virtual machines by creating a secondary VM th...read more

Q97. What DSA and how would you implementing in real world scenario?

Ans.

DSA stands for Data Structure and Algorithms. It is a way to organize and manipulate data efficiently.

  • DSA helps in solving complex problems by providing efficient data organization and manipulation techniques.

  • It includes various data structures like arrays, linked lists, trees, graphs, etc.

  • Algorithms are used to perform operations on these data structures, such as searching, sorting, and traversing.

  • In a real-world scenario, DSA can be implemented in various applications like ...read more

Q98. WHAT ARE FOUR BASIC PRINCIPLES OF OOPS?

Ans.

Four basic principles of OOPS are encapsulation, inheritance, polymorphism, and abstraction.

  • Encapsulation: bundling of data and methods that manipulate the data within a single unit

  • Inheritance: ability of a class to inherit properties and characteristics from a parent class

  • Polymorphism: ability of objects to take on multiple forms or have multiple behaviors

  • Abstraction: hiding of complex implementation details and providing a simpler interface for the user

Q99. How do you resolve a driver malfunctioning issue?

Ans.

To resolve a driver malfunctioning issue, update or reinstall the driver.

  • Check for any updates available for the driver

  • Uninstall the driver and reinstall it

  • Rollback the driver to the previous version

  • Check for any hardware issues causing the malfunction

Q100. How to resolve Bluetooth not working issue?

Ans.

Check Bluetooth settings, restart device, update drivers, reset Bluetooth module

  • Check if Bluetooth is turned on and device is discoverable

  • Restart the device and try connecting again

  • Update Bluetooth drivers

  • Reset Bluetooth module by disabling and enabling it

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