High 100 IT Technician Interview Questions And Solutions (2023)

1. What’s DNS and the way does it work?

Reply:
DNS (Area Title System) interprets human-readable domains into IP addresses. It resolves queries from internet browsers to find the proper server.

Official Reference: DNS Defined

2. Clarify the aim of DHCP in a community.

Reply:
DHCP (Dynamic Host Configuration Protocol) routinely assigns IP addresses to gadgets in a community. It simplifies community administration by eliminating handbook IP configuration.

Official Reference: DHCP Overview

3. How would you troubleshoot a pc that’s unable to hook up with the web?

Reply:

1. Examine bodily connections.
2. Confirm IP configuration.
3. Ping the default gateway.
4. Strive a distinct browser.
5. Examine for DNS points.

4. Clarify the aim of a firewall.

Reply:
A firewall is a safety machine that screens and filters incoming and outgoing community site visitors primarily based on an utilized rule set. It helps defend a community from unauthorized entry and cyber threats.

Official Reference: Firewall Fundamentals

5. How do you troubleshoot a printer that isn’t printing?

Reply:

1. Examine bodily connections.
2. Confirm paper and ink ranges.
3. Restart the printer.
4. Replace or reinstall printer drivers.
5. Examine for error messages.

6. What’s RAID and why is it used?

Reply:
RAID (Redundant Array of Unbiased Disks) is a expertise that mixes a number of disk drives to enhance efficiency, redundancy, or a mixture of each.

Official Reference: RAID Defined

7. Clarify the idea of a subnet masks.

Reply:
A subnet masks is a 32-bit quantity used along side an IP deal with to divide a big community into smaller subnetworks, enhancing community efficiency and safety.

Official Reference: Subnetting Defined

8. How would you troubleshoot a pc that’s gradual as well up?

Reply:

1. Examine for malware or viruses.
2. Handle startup packages.
3. Improve RAM or improve {hardware}.
4. Optimize system settings.
5. **Examine for disk errors.

9. Clarify the aim of an IP deal with.

Reply:
An IP deal with is a singular identifier assigned to every machine in a community to facilitate communication. It permits gadgets to ship and obtain knowledge.

Official Reference: IP Addressing Fundamentals

10. How do you troubleshoot a pc that’s experiencing frequent blue display screen errors?

Reply:

1. Examine for driver updates.
2. Scan for malware or viruses.
3. Examine for {hardware} points.
4. Monitor temperature and airflow.
5. **Examine for current software program installations.

11. Clarify the aim of an working system.

Reply:
An working system is software program that manages {hardware} and software program sources, offering companies for pc packages. It acts as an middleman between the person and pc {hardware}.

Official Reference: Working System Overview

12. How do you troubleshoot a pc that isn’t recognizing a USB machine?

Reply:

1. Strive a distinct USB port.
2. Examine for driver updates.
3. Take a look at the machine on one other pc.
4. Examine for bodily injury or bent pins.

13. Clarify the aim of a VPN.

Reply:
A VPN (Digital Non-public Community) creates a safe connection over a public community, permitting customers to entry personal networks remotely. It enhances safety and privateness.

Official Reference: VPN Fundamentals

14. How do you

troubleshoot a community printer that isn’t responding?

Reply:

1. Examine bodily connections.
2. Confirm community settings.
3. Restart the printer and router.
4. Examine for paper jams or low ink ranges.

15. Clarify the aim of a swap in networking.

Reply:
A swap is a networking machine that connects gadgets inside an area space community (LAN). It makes use of MAC addresses to ahead knowledge to the proper vacation spot.

Official Reference: Change Fundamentals

16. How do you troubleshoot a pc that isn’t recognizing an exterior onerous drive?

Reply:

1. Examine bodily connections.
2. Strive a distinct USB port and cable.
3. Take a look at the onerous drive on one other pc.
4. **Examine for driver updates.

17. Clarify the aim of a router in networking.

Reply:
A router is a networking machine that forwards knowledge packets between pc networks. It serves because the site visitors supervisor, directing knowledge on essentially the most environment friendly path.

Official Reference: Router Fundamentals

18. How do you troubleshoot a pc that isn’t connecting to Wi-Fi?

Reply:

1. Restart the router and pc.
2. Examine for Wi-Fi sign interference.
3. Confirm Wi-Fi password and SSID.
4. **Replace Wi-Fi drivers.

19. Clarify the aim of an antivirus program.

Reply:
An antivirus program is a software program designed to detect, forestall, and take away malicious software program (malware) from a pc or community.

Official Reference: Antivirus Fundamentals

20. How do you troubleshoot a pc that isn’t displaying something on the monitor?

Reply:

1. Examine monitor energy and connections.
2. Take a look at a distinct monitor or cable.
3. Examine for graphics card points.
4. Reset BIOS settings if obligatory.

21. Clarify the aim of an SSD (Strong-State Drive) in a pc.

Reply:
An SSD is a storage machine that makes use of NAND-based flash reminiscence to retailer knowledge. It gives sooner entry occasions and improved efficiency in comparison with conventional onerous disk drives (HDDs).

Official Reference: SSD vs HDD

22. How do you troubleshoot a pc that’s experiencing frequent software program crashes?

Reply:

1. Replace software program and drivers.
2. Examine for conflicting functions.
3. Scan for malware or viruses.
4. Monitor system sources.

23. Clarify the aim of BIOS (Fundamental Enter/Output System) in a pc.

Reply:
BIOS is firmware saved on a pc’s motherboard. It initializes {hardware} parts throughout startup and gives the fundamental directions for the working system to load.

Official Reference: BIOS Fundamentals

24. How do you troubleshoot a pc that isn’t recognizing RAM?

Reply:

1. Reseat RAM modules.
2. Take a look at one module at a time.
3. Examine for suitable RAM varieties.
4. Replace motherboard firmware if wanted.

25. Clarify the aim of a UPS (Uninterruptible Energy Provide) in a pc setup.

Reply:
A UPS is a tool that gives battery backup throughout energy outages. It permits customers to save lots of their work and safely shut down their pc to forestall knowledge loss.

Official Reference: UPS Fundamentals

26. How do you troubleshoot a pc that isn’t recognizing a selected USB port?

Reply:

1. Strive a distinct machine within the port.
2. Examine for bodily injury or particles.
3. Reinstall USB drivers.
4. Confirm energy provide to the port.

27. Clarify the aim of a CMOS battery in a pc.

Reply:
The CMOS battery maintains the system clock and shops BIOS settings. It ensures that the pc’s configuration is retained even when the ability is off.

Official Reference: CMOS Battery Overview

28. How do you troubleshoot a pc that isn’t taking part in audio?

Reply:

1. Examine quantity settings and mute standing.
2. Take a look at with completely different audio system or headphones.
3. Replace audio drivers.
4. Guarantee audio cables are correctly related.

29. Clarify the aim of a community swap.

Reply:
A community swap connects a number of gadgets inside an area space community (LAN) and makes use of MAC addresses to ahead knowledge to the proper vacation spot.

Official Reference: Change Fundamentals

30. How do you troubleshoot a pc that isn’t recognizing an optical drive (CD/DVD drive)?

Reply:

1. Examine bodily connections and cables.
2. Confirm if the drive is detected in BIOS.
3. Replace or reinstall drivers.
4. Strive a distinct disc within the drive.

31. Clarify the aim of a VPN (Digital Non-public Community).

Reply:
A VPN creates a safe, encrypted connection over a public community, permitting customers to entry personal networks remotely. It enhances safety and privateness.

Official Reference: VPN Fundamentals

32. How do you troubleshoot a pc that isn’t connecting to a selected Wi-Fi community?

Reply:

1. Overlook and re-enter the Wi-Fi password.
2. Examine for MAC deal with filtering.
3. Replace wi-fi community drivers.
4. Strive connecting to a distinct community.

33. Clarify the aim of an antivirus program.

Reply:
An antivirus program detects, prevents, and removes malicious software program (malware) from a pc or community.

Official Reference: Antivirus Fundamentals

34. How do you troubleshoot a pc that isn’t booting up in any respect?

Reply:

1. Examine energy connections and sources.
2. Take a look at with a distinct energy twine or outlet.
3. Reset BIOS settings to default.
4. Strive booting in Secure Mode.

35. Clarify the aim of a firewall.

Reply:
A firewall is a safety machine that screens and filters incoming and outgoing community site visitors primarily based on utilized rule units. It helps defend a community from unauthorized entry and cyber threats.

Official Reference: Firewall Fundamentals

36. Clarify the aim of a proxy server in a community.

Reply:
A proxy server acts as an middleman between consumer gadgets and the web. It may be used for numerous functions, together with enhancing safety, efficiency, and anonymity.

Official Reference: Proxy Server Overview

37. How do you troubleshoot a pc that isn’t recognizing an exterior monitor?

Reply:

1. Examine bodily connections and cables.
2. Press the proper perform key for show switching (e.g., Fn + F4).
3. Replace graphics drivers.
4. Strive a distinct monitor or cable.

38. Clarify the aim of a BIOS replace.

Reply:
A BIOS replace gives bug fixes, {hardware} assist enhancements, and safety enhancements. It helps guarantee a pc’s compatibility with new {hardware} and software program.

Official Reference: BIOS Replace Fundamentals

39. How do you troubleshoot a pc that isn’t charging when related to the ability adapter?

Reply:

1. Examine the ability adapter and cable for injury.
2. Examine the charging port for particles or injury.
3. Strive a distinct energy outlet.
4. Take a look at with a distinct energy adapter (if out there).

40. Clarify the aim of an IP deal with reservation in a DHCP server.

Reply:
IP deal with reservation in DHCP ensures {that a} particular machine at all times receives the identical IP deal with. It’s helpful for gadgets that require constant community configuration.

Official Reference: IP Reservation Overview

41. How do you troubleshoot a pc that isn’t recognizing a USB mouse?

Reply:

1. Strive a distinct USB port and mouse.
2. Examine for driver updates.
3. Take a look at the mouse on one other pc.
4. Examine for bodily injury to the mouse or port.

42. Clarify the aim of a MAC deal with.

Reply:
A MAC (Media Entry Management) deal with is a singular identifier assigned to a community interface card (NIC) in a tool. It’s used to make sure knowledge packets are delivered to the proper machine inside a community.

Official Reference: MAC Handle Fundamentals

43. How do you troubleshoot a pc that isn’t detecting a community printer?

Reply:

1. Examine bodily connections and cables.
2. Confirm printer settings and community configuration.
3. Replace printer drivers.
4. Restart the printer and pc.

44. Clarify the aim of RAID 5.

Reply:
RAID 5 is a storage configuration that makes use of striping with parity to supply each elevated efficiency and fault tolerance. It’s generally used for knowledge redundancy and efficiency enchancment.

Official Reference: RAID 5 Overview

45. How do you troubleshoot a pc that isn’t recognizing an SD card?

Reply:

1. Strive a distinct SD card.
2. Examine for a broken SD card reader.
3. Replace card reader drivers.
4. Examine the SD card for bodily injury or corruption.

46. Clarify the aim of a router’s NAT (Community Handle Translation) characteristic.

Reply:
NAT permits a number of gadgets inside an area community to share a single public IP deal with. It masks inner IP addresses, enhancing safety and conserving public IP addresses.

Official Reference: NAT Fundamentals

47. How do you troubleshoot a pc that isn’t receiving emails in its electronic mail consumer?

Reply:

1. Examine web connectivity.
2. Confirm electronic mail account settings.
3. Disable antivirus or firewall electronic mail scanning briefly.
4. Examine for electronic mail consumer updates.

48. Clarify the aim of a UPS (Uninterruptible Energy Provide) in a server room.

Reply:
In a server room, a UPS gives backup energy throughout outages, stopping knowledge loss and sustaining server uptime. It additionally filters energy to guard in opposition to surges and spikes.

Official Reference: UPS in Server Rooms

49. How do you troubleshoot a pc that isn’t connecting to a selected community share?

Reply:

1. Confirm community share permissions.
2. Examine for entry credentials and password modifications.
3. Take a look at connectivity to different community shares.
4. **Examine for community points or server standing.

50. Clarify the aim of a patch administration system.

Reply:
Patch administration ensures that software program, working techniques, and functions are recurrently up to date with safety patches and updates to guard in opposition to vulnerabilities.

Official Reference: Patch Administration Overview