Interview questions
IT Support Specialist interview questions
53 realistic questions across technical, behavioural, HR, situational and role-specific categories. Questions only — join free to unlock model answers, quizzes and AI mock interviews.
Showing 25 of 53 questions
Can you describe a scenario where you chose composition over inheritance in your code and explain your reasoning?
Technical
Beginner
Q1
How would you design a REST API endpoint to handle millions of requests per day for a critical feature?
Technical
Intermediate
Q2
Describe the steps you would take to identify and resolve a slow-running database query affecting user experience.
Technical
Intermediate
Q3
What strategies would you implement to maintain fast page load times during sudden traffic spikes?
Technical
Advanced
Q4
How would you implement authentication and authorization to secure an API from unauthorized access?
Technical
Advanced
Q5
How do you decide which parts of your application to cover with unit tests versus integration tests?
Technical
Intermediate
Q6
Can you explain how you would identify and prevent race conditions when multiple users update the same data concurrently?
Technical
Advanced
Q7
Describe the process you would follow to deploy a new version of a service without causing downtime.
Technical
Advanced
Q8
How would you troubleshoot a hardware issue causing intermittent system crashes on a user’s computer?
Technical
Beginner
Q9
Can you walk me through how you would use operating system tools to diagnose and resolve a process consuming excessive CPU?
Technical
Beginner
Q10
A colleague reports network connectivity issues. How would you assist them in diagnosing and fixing the problem?
Technical
Intermediate
Q11
How would you diagnose and resolve a user's inability to log in to the domain due to a locked Active Directory account?
Technical
Intermediate
Q12
How would you install and configure a new printer on a Windows 10 workstation that must be shared with a specific department?
Technical
Intermediate
Q13
Walk me through how you would troubleshoot a user's report that their computer is running very slowly after a recent update.
Technical
Intermediate
Q14
How would you advise a colleague on implementing security best practices to protect company data?
Technical
Advanced
Q15
How would you remotely diagnose and fix a user's inability to connect to the company VPN from their home office?
Technical
Advanced
Q16
How would you restore a single critical file that a user accidentally deleted from a network share, assuming backups run nightly?
Technical
Advanced
Q17
Walk me through how you would write a PowerShell script to automatically disable inactive user accounts in Active Directory.
Technical
Expert
Q18
How would you troubleshoot a user who cannot access the internet but can access internal company resources?
Technical
Intermediate
Q101
How would you remotely diagnose and fix a user's issue where their mouse cursor moves erratically?
Technical
Intermediate
Q105
Walk me through how you would perform a full system restore from a backup after a ransomware attack on a single server.
Technical
Advanced
Q106
How would you create a simple script to automate a repetitive IT support task?
Technical
Advanced
Q107
What would you do if you had to deal with Incident Management and Ticketing Systems at short notice?
Role Specific
Advanced
Q108
Walk me through how you would set up a virtual machine in Hyper-V to test a new software deployment without affecting production.
Technical
Advanced
Q124
How would you develop a script to automate user account creation and permissions assignment?
Technical
Advanced
Q125
Want the answers?
Create a free account to open each question, study the model answer and test yourself.
Create free account