20+ IT System Engineer Interview Questions and Answers

DNS (Domain Name System) is a system that translates domain names to IP addresses, while DHCP (Dynamic Host Configuration Protocol) assigns IP addresses to devices on a network.

• DNS resolves domain names to IP addresses, allowing users to access websites using human-readable names (e.g. www.google.com)

• DHCP dynamically assigns IP addresses to devices on a network, simplifying network administration and reducing the risk of IP address conflicts

• DNS typically uses port 53 for both...read more

P1, P2, and P3 represent the priorities assigned to tickets in ticketing tools.

• P1 represents the highest priority level, usually for critical issues that require immediate attention.

• P2 represents a medium priority level, for issues that need to be resolved in a timely manner but are not critical.

• P3 represents the lowest priority level, for minor issues or requests that can be addressed when time permits.

SLA stands for Service Level Agreement in ServiceNow, defining agreed upon levels of service between provider and customer.

• SLA in ServiceNow sets expectations for response and resolution times for incidents and requests

• It helps in measuring and improving service performance

• SLAs can be customized based on the criticality of services or customers

• Example: SLA for critical incidents may require a response within 1 hour and resolution within 4 hours

BSOD is a Windows error screen displayed when the system encounters a critical error that it cannot recover from.

• BSOD is commonly caused by hardware failures, driver issues, or software conflicts.

• To resolve BSOD errors, one can try restarting the computer, updating drivers, running system diagnostics, or performing a system restore.

• Examples of BSOD errors include 'IRQL_NOT_LESS_OR_EQUAL' and 'KERNEL_SECURITY_CHECK_FAILURE'.

Incident management involves responding to and resolving unplanned events that disrupt IT services. Change management is the process of controlling changes to IT systems.

• Incident management focuses on restoring normal service operation as quickly as possible.

• Change management ensures that changes to IT systems are implemented in a controlled and coordinated manner.

• Examples of incidents include server crashes, network outages, and software failures.

• Examples of changes include ...read more

Patch management in Windows Server involves regularly applying updates and patches to ensure system security and stability.

• Regularly applying updates and patches to Windows Server to address security vulnerabilities

• Testing patches in a non-production environment before deploying to production servers

• Automating patch deployment using tools like WSUS or SCCM

• Creating a patch management policy to define procedures for patching servers

• Monitoring patch compliance and ensuring all s...read more

Manually configure Outlook for data backup by setting up a PST file.

• Open Outlook and go to File > Account Settings > Account Settings.

• Click on the Data Files tab and then Add to create a new PST file.

• Choose a location to save the PST file and set a name for it.

• Select the folders you want to backup by dragging them into the new PST file.

• Regularly export the PST file to ensure data backup is up to date.

There are five classes of IP addresses: A, B, C, D, and E.

• Class A: Used for large networks, with the first octet being the network portion and the remaining three octets being the host portion. Example: 10.0.0.0

• Class B: Used for medium-sized networks, with the first two octets being the network portion and the remaining two octets being the host portion. Example: 172.16.0.0

• Class C: Used for small networks, with the first three octets being the network portion and the last oct...read more

I am comfortable communicating in Hindi, Kannada, and English.

• I am fluent in all three languages and can communicate effectively in any of them.

• I can switch between languages depending on the situation and the person I am speaking with.

• For example, if a client prefers to speak in Hindi, I can easily switch to that language to ensure clear communication.

• Similarly, if a colleague prefers to speak in English, I can do so without any difficulty.

• Overall, my language skills allow m...read more

Two computers can be connected in a network using various methods such as Ethernet cables, Wi-Fi, or Bluetooth.

• Ethernet cables

• Wi-Fi

• Bluetooth

• LAN

• WAN

Public IP addresses are globally unique and used to identify devices on the internet. Private IP addresses are used within a local network.

• Public IP addresses are assigned by Internet Service Providers (ISPs)

• Private IP addresses are assigned by a local network administrator

• Public IP addresses are routable on the internet

• Private IP addresses are not routable on the internet

• Examples of public IP addresses include 8.8.8.8 and 216.58.194.174

• Examples of private IP addresses includ...read more

A router is a networking device that forwards data packets between computer networks. A switch connects devices within a network.

• A router operates at the network layer of the OSI model, while a switch operates at the data link layer.

• A router can connect multiple networks together, while a switch connects devices within a single network.

• Routers use IP addresses to forward packets to their destination, while switches use MAC addresses to direct traffic.

• IP stands for Internet Pr...read more

Gaussian distribution is a continuous probability distribution that is symmetrical around its mean, while binomial distribution is a discrete probability distribution that represents the number of successes in a fixed number of trials.

• Gaussian distribution is also known as normal distribution and follows the bell curve shape.

• Binomial distribution is used to model the number of successes in a fixed number of trials, with each trial having the same probability of success.

• Gaussi...read more

Google Cloud is a suite of cloud computing services provided by Google.

• Offers infrastructure, platform, and software as a service

• Includes services such as Google Compute Engine, Google Kubernetes Engine, and Google Cloud Storage

• Provides tools for data analytics, machine learning, and internet of things

• Allows for easy scalability and flexibility

• Used by companies such as Spotify, Coca-Cola, and HSBC

Topologies refer to the layout or structure of a network, determining how devices are connected and communicate with each other.

• Different types include bus, ring, star, mesh, and hybrid topologies

• Bus topology uses a single cable to connect all devices

• Ring topology connects devices in a circular fashion

• Star topology has all devices connected to a central hub

• Mesh topology has every device connected to every other device

• Hybrid topology is a combination of two or more different t...read more

ITIL best practices include incident management, problem management, change management, and service level management.

• Incident management: timely resolution of incidents to minimize impact on business operations

• Problem management: identifying and addressing the root cause of recurring incidents

• Change management: managing changes to IT infrastructure to minimize disruption and risk

• Service level management: ensuring IT services meet agreed-upon service levels

An incident is an unplanned event that disrupts normal operations and requires immediate attention to resolve.

• An incident can be a hardware or software failure

• It can also be a security breach or data loss

• Examples include server crashes, network outages, and malware infections

A problem is an issue or obstacle that needs to be solved or addressed.

• A problem can arise from technical issues, errors in code, hardware malfunctions, or network failures.

• Identifying the root cause of a problem is crucial in finding a solution.

• Effective problem-solving skills involve analyzing the situation, brainstorming possible solutions, and implementing the best course of action.

• Examples: troubleshooting a server outage, resolving software bugs, fixing network connecti...read more

Oops concepts refer to Object-Oriented Programming principles like Inheritance, Polymorphism, Encapsulation, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Encapsulation: Bundling of data with the methods that operate on that data.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.