10+ L1 Support Engineer Interview Questions and Answers

Firewalls are network security devices that monitor and control incoming and outgoing network traffic.

• Packet-filtering firewalls

• Proxy firewalls

• Stateful inspection firewalls

• Next-generation firewalls

• Application-level gateways

Troubleshooting an issue involves identifying the problem, gathering information, analyzing data, and implementing a solution.

• Identify the problem by gathering information from the user or system logs.

• Analyze the data to determine the root cause of the issue.

• Implement a solution by following established procedures or using problem-solving techniques.

• Test the solution to ensure the issue is resolved.

• Document the troubleshooting steps and the solution for future reference.

Laptop and desktop hardware refers to the physical components that make up a computer system.

• Laptops are portable and have built-in batteries

• Desktops are stationary and require external power sources

• Both have a CPU, RAM, storage, and input/output devices

• Laptops have smaller components and are more difficult to upgrade

• Desktops have larger components and are easier to upgrade

• Examples of hardware include motherboards, processors, hard drives, and graphics cards

Objects and classes are fundamental concepts in Java programming language.

• Objects are instances of classes that encapsulate data and behavior.

• Classes are templates or blueprints that define the properties and methods of objects.

• Objects communicate with each other by invoking methods on each other.

• Inheritance allows classes to inherit properties and methods from other classes.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

Windows is a popular operating system developed by Microsoft.

• Windows is a graphical user interface (GUI) based operating system.

• It supports multitasking and multi-user functionality.

• It has a wide range of applications and software support.

• Windows has different versions like Windows 7, 8, 10, etc.

• It is widely used in personal computers, laptops, and servers.

Windows is a series of operating systems developed by Microsoft.

• Windows 1.0 was released in 1985

• Windows 95 was a major release with a new user interface

• Windows XP was a popular version that was released in 2001

• Windows 10 is the latest version released in 2015

DHCP is a network protocol that automatically assigns IP addresses to devices, while DNS is a system that translates domain names to IP addresses.

• DHCP stands for Dynamic Host Configuration Protocol

• DHCP automatically assigns IP addresses to devices on a network

• DNS stands for Domain Name System

• DNS translates domain names to IP addresses

• DHCP and DNS are essential components of network communication

NFS is a network file system used for sharing files between Unix/Linux systems. crontab is a file used to schedule tasks to run at specific times.

• NFS stands for Network File System and allows remote file systems to be accessed over a network.

• crontab is a file that contains scheduled tasks to be executed at specific times.

• NFS is commonly used in Unix/Linux environments for sharing files and directories.

• Examples of crontab usage include scheduling backups, running maintenance t...read more

Routing types refer to the methods used to direct network traffic between devices.

• Static routing: manually configured routes

• Dynamic routing: routes are automatically updated based on network changes

• Default routing: used when no specific route is available

• Policy-based routing: routes based on specific criteria, such as source IP or protocol

• Multicast routing: used for sending data to multiple recipients

• Anycast routing: used to direct traffic to the nearest available server

Unix is an operating system developed in the 1970s, while Linux is a Unix-like operating system developed in the 1990s.

• Unix is proprietary and closed source, while Linux is open source.

• Unix is typically used in enterprise environments, while Linux is popular for personal and server use.

• Unix has a limited number of distributions, while Linux has many distributions such as Ubuntu, Fedora, and Debian.

• Unix has a higher cost of ownership due to licensing fees, while Linux is free ...read more