Top 50 Technical Support Interview Questions and Answers (2025)

Prepare for your technical support interviews with these top 50 questions and answers covering networking, troubleshooting, system tools, and customer handling, designed for freshers and experienced candidates. Learn key technical support skills for 2025 job readiness on Jobformore.

Technical Support Interview Questions and Answers

1. What is Technical Support?
   Assisting customers with technical issues via troubleshooting, guidance, and issue resolution.
   
2. What are your key responsibilities in a technical support role?
   Troubleshooting, customer handling, documenting issues, escalating if needed.
   
3. Explain DHCP.
   DHCP dynamically assigns IP addresses to devices on a network.
   
4. Explain DNS.
   DNS converts domain names into IP addresses.
   
5. What is an IP address?
   A unique identifier for a device on a network.
   
6. Difference between IPv4 and IPv6?
   IPv4 uses 32-bit addressing; IPv6 uses 128-bit addressing.
   
7. What is a subnet mask?
   It divides an IP address into network and host portions.
   
8. How to check network connectivity?
   Use ping, tracert, and check physical connections.
   
9. What is the purpose of the ipconfig command?
   To view and manage network configurations on Windows.
   
10. What does the tracert command do?
    Traces the route packets take to reach a destination.
    
11. How to check system logs in Windows?
    Using Event Viewer.
    
12. What is BSOD?
    Blue Screen of Death indicating a critical system error.
    
13. What is safe mode?
    A diagnostic mode to troubleshoot system issues.
    
14. How to check system performance?
    Use Task Manager and Resource Monitor.
    
15. How to handle slow system performance?
    Check for high CPU usage, clear temp files, check startup programs.
    
16. How to troubleshoot printer issues?
    Check connections, drivers, print queue, and paper jams.
    
17. Explain the difference between hardware and software.
    Hardware is physical components; software is programs and OS.
    
18. What is BIOS?
    Basic Input/Output System that initializes hardware during boot.
    
19. What is firmware?
    Software programmed into hardware.
    
20. How do you update drivers?
    Through Device Manager or OEM websites.
    
21. What is Device Manager?
    A Windows tool for managing hardware devices.
    
22. What is a proxy server?
    Acts as an intermediary between clients and servers.
    
23. Explain VPN.
    Virtual Private Network secures connections over the internet.
    
24. What is a firewall?
    A security system that controls network traffic.
    
25. How to scan for malware?
    Using Windows Defender or antivirus tools.
    
26. What is port forwarding?
    Redirecting communication requests to specific devices.
    
27. What is latency?
    Delay in data transmission.
    
28. How do you handle an irate customer?
    Listen calmly, empathize, resolve, and follow up.
    
29. What is a ticketing system?
    Manages and tracks customer support requests.
    
30. Examples of ticketing tools?
    ServiceNow, Jira, Zendesk.
    
31. What is SSH?
    Secure Shell protocol for secure remote connections.
    
32. What is RDP?
    Remote Desktop Protocol to access Windows remotely.
    
33. How to create a user in Windows?
    Via Control Panel > User Accounts.
    
34. How to check disk usage?
    Using ‘chkdsk’ or Disk Management.
    
35. What is defragmentation?
    Rearranging fragmented data for efficiency.
    
36. What is a MAC address?
    Physical address of a network interface card.
    
37. What is ping?
    A command to test connectivity.
    
38. What is nslookup?
    Command to query DNS servers.
    
39. How to troubleshoot email issues?
    Check connectivity, credentials, server settings.
    
40. What is SSL?
    Secure Sockets Layer for encrypted connections.
    
41. How to reset a password in Windows?
    Using ‘net user’ command or via Control Panel.
    
42. What is safe boot?
    Starts Windows with minimal drivers for troubleshooting.
    
43. What is a hotfix?
    A software update to fix a specific issue.
    
44. How to backup data?
    Using File History, third-party tools, or cloud.
    
45. What is system restore?
    Reverts system to a previous state.
    
46. What is a domain?
    A network of computers under a central administration.
    
47. Difference between workgroup and domain?
    Workgroup is peer-to-peer; domain is centrally managed.
    
48. How to map a network drive?
    Using File Explorer > Map network drive.
    
49. What is escalation in support?
    Moving an unresolved issue to higher support levels.
    
50. Why do you want to work in technical support?
    Align with learning, problem-solving, and customer service passion.

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