1000+ Technical Support Engineer Interview Questions and Answers

TCP/IP is a set of protocols used for communication over the internet. OSI layer is a model for network communication.

• TCP/IP is a suite of communication protocols used for transmitting data over the internet.

• It consists of two main protocols: Transmission Control Protocol (TCP) and Internet Protocol (IP).

• TCP ensures reliable transmission of data while IP is responsible for routing packets to their destination.

• OSI layer is a conceptual model for network communication that defi...read more

Modem connects to the internet, router connects devices to the network, switch connects devices to each other.

• Modem converts digital signals to analog for transmission over phone lines or cable lines.

• Router directs traffic between devices on a network and connects to the internet through a modem.

• Switch connects devices to each other within a network.

• Example: Modem - cable modem, Router - Linksys router, Switch - Netgear switch

Static IP address is fixed and does not change, while Dynamic IP address changes frequently.

• Static IP address is manually assigned to a device and remains the same until changed.

• Dynamic IP address is automatically assigned by a DHCP server and changes each time the device connects to the network.

• Static IP address is useful for servers, printers, and other devices that need a consistent IP address.

• Dynamic IP address is more common for personal devices like laptops and smartpho...read more

Load average is the average number of processes waiting to run on a CPU. Command: 'uptime' or 'top'.

• Load average is a measure of system utilization.

• It is the average number of processes waiting to run on a CPU.

• It is calculated over a period of time, usually 1, 5, and 15 minutes.

• High load average indicates that the system is overloaded.

• Command to check load average: 'uptime' or 'top'.

• Path for 'uptime': /usr/bin/uptime

• Path for 'top': /usr/bin/top

The root user name can be changed by modifying the /etc/passwd file.

• Open the /etc/passwd file in a text editor

• Locate the line that starts with 'root'

• Change the username in the first field to the desired name

• Save and close the file

• Restart the system or use the 'su' command to switch to the new username

Cloud solutions offer scalability, flexibility, and cost-effectiveness compared to traditional dedicated solutions.

• Scalability: Cloud solutions can easily scale up or down based on demand.

• Flexibility: Cloud solutions offer more flexibility in terms of customization and integration with other services.

• Cost-effectiveness: Cloud solutions can be more cost-effective as they eliminate the need for expensive hardware and maintenance costs.

• Examples: AWS, Azure, Google Cloud Platform

DNS, DHCP, networking, troubleshooting, and Active Directory are all related to managing and troubleshooting network services and infrastructure.

• DNS (Domain Name System) is responsible for translating domain names into IP addresses.

• DHCP (Dynamic Host Configuration Protocol) is used to automatically assign IP addresses to devices on a network.

• Networking involves the design, implementation, and management of computer networks.

• Troubleshooting is the process of identifying and re...read more

VPN stands for Virtual Private Network. It is a secure way to connect to a private network over the internet.

• To connect to a VPN, you need to have a VPN client installed on your device.

• You also need to have the login credentials for the VPN network.

• Once you have the client installed and the credentials, you can connect to the VPN by selecting the network and entering your login details.

• VPN can be used to access resources on a private network while working remotely or to secur...read more

Public cloud is shared by multiple organizations while private cloud is dedicated to a single organization. Private cloud is more secure.

• Public cloud is accessible to anyone on the internet while private cloud is accessible only to authorized users.

• Public cloud is less secure as it is shared by multiple organizations and there is a risk of data breaches.

• Private cloud is more secure as it is dedicated to a single organization and has more control over security measures.

• Example...read more

Answers to technical questions related to voltage, P.F, AVR, battery backup, and DG servicing cycle.

• Earth to neutral voltage is the voltage between the earth and neutral points of an electrical system.

• P.F of DG set refers to the power factor of a diesel generator set.

• AVR stands for Automatic Voltage Regulator.

• Battery cell voltage is the voltage produced by a single battery cell.

• The Amp load outcome of a 4K rectifier module depends on the load connected to it.

• The DG servicing ...read more

BSOD is a blue screen error that appears on Windows operating systems when a critical system error occurs.

• BSOD is also known as a stop error or a system crash

• It usually displays a blue screen with white text indicating the error message

• Common causes include hardware failure, driver issues, and software conflicts

• Examples of BSOD error messages include IRQL_NOT_LESS_OR_EQUAL and PAGE_FAULT_IN_NONPAGED_AREA

Handling clients requires effective communication and demonstration skills.

• Listen to their queries and concerns patiently.

• Explain the features and benefits of the device clearly.

• Demonstrate the operation process step-by-step.

• Encourage them to ask questions and clarify doubts.

• Provide them with user manuals and support contact details.

• Follow up with them after the demo to ensure satisfaction.

Guide a new user to set up a printer

• Ask the user to connect the printer to the computer and turn it on

• Check if the printer drivers are installed on the computer

• If not, download and install the drivers from the manufacturer's website

• Go to Control Panel > Devices and Printers > Add a printer

• Select the printer from the list of available printers

• Follow the on-screen instructions to complete the setup process

To reinstall drivers for any hardware, follow these steps.

• Uninstall the current driver from Device Manager

• Download the latest driver from the manufacturer's website

• Install the new driver by running the setup file

• Restart the computer to complete the installation

• If the driver is not available on the website, use Windows Update or a driver update tool

• Ensure compatibility with the operating system and hardware version

MFA is a security process that requires multiple forms of verification to access an account or system.

• MFA combines two or more authentication factors such as passwords, biometrics, security tokens, etc.

• It provides an extra layer of security to prevent unauthorized access.

• Examples of MFA include using a password along with a fingerprint scan or receiving a code on your phone to log in.

• MFA is commonly used in online banking, email accounts, and other sensitive systems.

Guide non tech savvy user over phone to fix broken computer

• Ask user to describe the problem and what they see on the screen

• Guide user to check if all cables are properly connected

• Instruct user to restart the computer and check if problem persists

• If problem still exists, guide user to run basic troubleshooting steps

• If issue is not resolved, escalate to higher level of support

A Cron job is a scheduled task that runs automatically at specified intervals in Linux.

• Cron is a time-based job scheduler in Linux.

• It is used to automate repetitive tasks like backups, updates, etc.

• Cron jobs are defined in a crontab file.

• The syntax for setting up a Cron job is: * * * * * command-to-be-executed

• The five asterisks represent the minute, hour, day of the month, month, and day of the week respectively.

• For example, to run a script every day at 3 AM, the syntax would...read more

Public and private keys are used for secure communication and encryption.

• Public key is used for encryption and can be shared with anyone.

• Private key is used for decryption and should be kept secret.

• They are used in various security protocols like SSL, SSH, and PGP.

• Example: When you visit a website with SSL, your browser uses the website's public key to encrypt data, which can only be decrypted by the website's private key.

• Another example: When you send an encrypted email usin...read more

If unable to solve a problem raised by the client, I would escalate it to a higher level of support or involve other team members.

• Assess the problem thoroughly to ensure all possible solutions have been attempted

• Consult with colleagues or seniors for their expertise and guidance

• Escalate the issue to a higher level of support if necessary

• Ensure clear and effective communication with the client throughout the process

Handling hot customers and prioritizing P1, P2 tickets

• Listen actively and empathize with the customer's frustration

• Remain calm and professional, avoid taking things personally

• Offer solutions and follow up promptly

• Prioritize P1 tickets based on severity and impact on business operations

• Assign P2 tickets based on urgency and customer impact

• Communicate clearly with customers about ticket status and resolution timelines

Stay calm and listen to the customer's concerns.

• Remain calm and composed

• Listen attentively to the customer's complaints

• Apologize for the inconvenience caused

• Assure the customer that you will do your best to resolve the issue

• Ask relevant questions to gather more information about the problem

• Offer possible solutions or troubleshooting steps

• If necessary, escalate the issue to a higher level of support

Resting foot on clutch pedal while driving can cause premature wear and tear of the clutch assembly.

• The clutch pedal is designed to disengage the clutch when pressed down.

• Resting the foot on the clutch pedal causes the clutch to partially engage, leading to friction and heat buildup.

• This can cause premature wear and tear of the clutch assembly, resulting in costly repairs.

• It is important to avoid resting the foot on the clutch pedal while driving to ensure the longevity of th...read more

Initial check points to look for if a vehicle drags to left side at 80 KMPH on highway.

• Check tire pressure and alignment

• Check suspension system

• Check for any damage to the steering components

• Check for any uneven wear on the tires

• Check for any brake issues

A network is a group of interconnected devices that can communicate and share resources.

• A network can be wired or wireless

• Devices on a network can share files, printers, and internet access

• Networks can be local (LAN) or wide area (WAN)

• Examples of networks include the internet, home networks, and corporate networks

The reaction when water is added to cement is called hydration.

• Hydration is a chemical reaction that occurs between water and cement.

• During hydration, the water molecules react with the cement particles, forming chemical compounds.

• This reaction is exothermic, releasing heat as the cement hardens and gains strength.

• Hydration is a crucial process in the setting and curing of cement-based materials.

• Examples of hydrated compounds formed during this reaction include calcium silica...read more

Shaft alignment in hydel power projects is carried out using laser alignment tools and techniques.

• Laser alignment tools are used to measure and correct shaft misalignment.

• The process involves measuring the offset and angular misalignment of the shafts.

• The readings are then used to adjust the position of the shafts until they are aligned within the required tolerances.

• Alignment is critical for efficient and safe operation of the hydel power project.

• Examples of laser alignment ...read more

Passive components do not require an external power source, while active components do.

• Passive components include resistors, capacitors, and inductors.

• Active components include transistors, diodes, and integrated circuits.

• Passive components can only attenuate signals, while active components can amplify and switch signals.

• Passive components are simpler and cheaper than active components.