Frequently Asked Questions for System Administrator Interviews

The system administrator is responsible for the IT systems of the company, including software and hardware. They should be able to troubleshoot problems and communicate technical information to non-technical people. During the interview process, companies assess candidates’ knowledge of IT system best practices.

Let’s now discuss the most frequently asked questions during the interview with a System Administrator:
Questions for Interviews
Question 1: Describe the Active Directory.
Answer: Active Directory provides central control for network administration and security. Domain controllers are servers that have been configured with Active Directory. Administrators can use Active Directory to create policies, deploy and update software. All information and settings are stored in a central database.
Question 2: Define domain?
Answer: A domain is a logical collection (computers, users, devices) of network objects that share an Active Directory database. Multiple domains can exist within a tree. A domain tree is a continuous namespace that contains many parts that share a common scheme and configuration.
Question 3: What is a domain controller and how does it work.
Answer: A Domain Controller (DC), also known as a network controller, is a Windows-based computer which stores user account data in an underlying database. It is the heartbeat of Windows Active Directory provider. It authenticates users, stores user information, and enforces security policy throughout a Windows domain.
A domain controller allows System Administrators to grant or deny access to system resources, such as printers and documents, folders and network locations, using a single username/password.
Question 4: Describe firewall?
Answer: A firewall is a device that blocks connections between two or more sources. It effectively blocks all traffic incoming and outgoing. Firewalls can be classified as software or hardware.
Question 5: What’s VPN?
Answer: A VPN (Virtual Private Network), is a network that allows anonymous connections to the internet. It allows users to establish secure connections over public networks such as the internet.
Question 6: What is Hyper-V?
Answer: Microsoft’s HyperV virtualization solution lets you create multiple virtual PCs from a single physical server. This reduces hardware costs and improves productivity. Technically, Hyper-V refers to a hypervisor.
Question 7: What is Office 365 exactly?
Answer: Microsoft Office 365 subscription-based program gives users access to the latest Office tools and other services like Teams, Groups, etc. Other Office 365 features include email clients, calendar apps, and a meeting planner.
Question 8: What is Group Policy exactly?
Answer: Group Policy can be used to create specific configurations for users or computers. Group Policy settings are stored within Group Policy objects (GPOs), which are associated with Active Directory service containers sites, domains, and Organizational Units.
Question 9: Define Group Policy Objectives?
Answer: A Group Policy Object is a set or parameters that govern how user accounts work together with machine accounts. GPOs are used to define registry-based policies, security options, software installation and maintenance options and script options. Two types of Group Policy Objects can be distinguished:
Each computer holds local Group Policy Objects.
Only Active Directory environments can use non-local Group Policies Objects stored on a Domain Controller.
Question 10: Where is the AD database located?
Answer: C:\Windows\NTDSNTDS.DIT contains the Azure Directory or AD database.
Question 11: What exactly does a root account mean?
Answer: The root account works in the same way as a system administrator account, but it gives you full control over the system. You can create root accounts.