10+ IT System Administrator Interview Questions and Answers

Yes, I have experience managing entire IT infrastructures independently.

• I have successfully managed the IT infrastructure at my previous job single-handedly

• I am proficient in various IT systems and tools that enable me to handle the entire infrastructure

• I have a strong problem-solving skills and can troubleshoot issues efficiently

VMware is a leading virtualization technology provider, enabling efficient resource management and deployment of virtual machines.

• Virtualization: VMware allows multiple virtual machines (VMs) to run on a single physical server, optimizing hardware usage.

• Data Center Management: VMware vSphere provides tools for managing and automating data center operations.

• Disaster Recovery: VMware Site Recovery Manager enables automated disaster recovery planning and execution.

• Cloud Computin...read more

My strategy would involve upgrading hardware, implementing automation tools, enhancing security measures, and providing continuous training for the team.

• Upgrade hardware to improve performance and reliability

• Implement automation tools to streamline processes and reduce manual tasks

• Enhance security measures to protect against cyber threats

• Provide continuous training for the team to stay updated with latest technologies and best practices

I work with a variety of servers and network switches depending on the company's infrastructure.

• I have experience with Cisco, HP, and Dell switches.

• I have worked with Windows Server, Linux, and VMware ESXi.

• I am familiar with Active Directory, DNS, DHCP, and Exchange Server.

• I have worked with SAN and NAS storage solutions.

• I am comfortable with configuring firewalls and VPNs.

• I have experience with cloud-based services such as AWS and Azure.

I have worked with Cisco switches such as Catalyst 2960, 3750, and 3850. I also have experience with virtualization using VMware, desktop support, and AWS.

• Cisco switches: Catalyst 2960, 3750, and 3850

• Virtualization with VMware

• OSI layer

• Desktop support

• AWS

Application Management Services (AMS) involves managing and supporting software applications to ensure optimal performance and availability.

• AMS includes monitoring application performance and availability.

• It involves troubleshooting and resolving application issues.

• AMS can provide software updates and patch management.

• Examples include managing ERP systems like SAP or CRM systems like Salesforce.

• AMS may also involve user support and training for application usage.

DHCP stands for Dynamic Host Configuration Protocol. It is a network protocol that automatically assigns IP addresses to devices.

• DHCP is used to simplify network administration by automatically assigning IP addresses to devices.

• It eliminates the need for manual IP address configuration.

• DHCP scopes define a range of IP addresses that can be assigned to devices on a network.

• There are three types of DHCP scopes: 1) Global scope, 2) Scope options, and 3) Super scope.

• Global scope ...read more

Change management is a structured approach to managing changes in IT systems to minimize disruption and ensure smooth transitions.

• Involves planning, assessing, and implementing changes to IT systems.

• Ensures that changes are made with minimal impact on services.

• Includes risk assessment to identify potential issues before changes are made.

• Utilizes documentation to track changes and their outcomes.

• Example: Upgrading a server's operating system requires a change management proces...read more

Active Directory is a directory service developed by Microsoft for Windows domain networks, managing users and resources.

• Centralized management of user accounts and permissions.

• Supports Group Policy for enforcing security settings across devices.

• Facilitates single sign-on (SSO) for accessing multiple applications.

• Organizes resources in a hierarchical structure using domains, trees, and forests.

• Example: An organization can create user groups for different departments, like HR ...read more

AAD stands for Azure Active Directory. WSB stands for Windows Server Backup.

• AAD is a cloud-based identity and access management service provided by Microsoft.

• WSB is a feature in Windows Server that provides backup and recovery options for Windows servers.

• AAD can be used for single sign-on, multi-factor authentication, and user provisioning.

• WSB allows for full server backups, scheduled backups, and recovery of individual files or folders.

A server is a computer or system that provides resources, services, and data to other computers or clients over a network.

• A server is a powerful computer that is dedicated to managing network resources.

• It provides services such as file storage, email, web hosting, database management, and more.

• Servers can be physical machines or virtual machines.

• They are designed to be reliable, secure, and scalable.

• Examples of servers include web servers like Apache or Nginx, database server...read more

A protocol is a set of rules that governs the communications between computers on a network.

• A protocol is a set of rules that governs the communications between computers on a network.

• It defines the format and sequence of messages exchanged between devices.

• Examples of protocols include TCP/IP, HTTP, FTP, and SMTP.

Exchange Online is a cloud-based email hosting service provided by Microsoft as part of Office 365.

• Cloud-based email hosting service

• Part of Office 365 suite

• Allows users to access emails, contacts, and calendars from anywhere

Antivirus is a software program designed to detect, prevent, and remove malicious software from a computer or network.

• Antivirus software scans files and programs for known viruses and malware.

• It can also monitor network traffic and block suspicious activity.

• Antivirus programs need to be regularly updated to stay effective against new threats.

• Examples of popular antivirus software include Norton, McAfee, and Avast.

DNS stands for Domain Name System, which translates domain names to IP addresses.

• DNS is like a phone book for the internet, translating human-readable domain names (like google.com) to IP addresses (like 172.217.3.206).

• It helps users access websites and other online services by resolving domain names to their corresponding IP addresses.

• DNS also helps in load balancing, failover, and security by directing traffic to the appropriate servers.

• Common DNS record types include A rec...read more

OTDR stands for Optical Time Domain Reflectometer.

• OTDR is a device used to test and troubleshoot fiber optic networks.

• It sends a pulse of light into the fiber and measures the time and intensity of the reflected signal.

• This information is used to locate faults and determine the quality of the fiber.

• OTDRs are commonly used by network technicians and engineers.

• Example brands of OTDRs include Fluke Networks, EXFO, and Anritsu.

CCTV stands for Closed Circuit Television.

• CCTV is a video surveillance system used for security purposes.

• It consists of cameras, monitors, and recording devices.

• CCTV footage can be used as evidence in legal proceedings.

• CCTV is commonly used in public places like airports, banks, and shopping malls.