#technical interview

12.24.2019

🖥️✨ Computer Network Interview Questions and Answers – Your Easy Prep Guide! ✨🖥️

When you hear the term Computer Networks, does your mind jump to routers, IP addresses, or maybe that one time your Wi-Fi betrayed you during an online class or meeting? 😂 Well, jokes aside, computer networking is one of the core subjects for students from CS/IT backgrounds – and guess what? Interviewers LOVE to ask questions from this topic.

Whether you're preparing for your first technical interview or brushing up for a campus placement, having a solid knowledge on basic networking concepts can make a real difference. From understanding how data travels across the internet to knowing what happens behind the scenes when you type a URL into your browser – networking concepts are everywhere. 💻

🚀 Top Computer Network Interview Questions & Answers 🔍

1. What is a Computer Network? A computer network is a group of two or more computers connected to each other so they can share resources, like files, printers, or the internet. The connection can be wired or wireless.

2. What’s the difference between LAN, MAN, and WAN?

LAN (Local Area Network): Covers a small area like your home or office.

MAN (Metropolitan Area Network): Covers a city or a large campus.

WAN (Wide Area Network): Covers large distances, like the internet.

3. What is an IP address? An IP address is a unique number assigned to every device connected to a network. It helps identify your device and allows it to communicate with other devices.

4. What is DNS? DNS (Domain Name System) translates domain names like google.com into IP addresses. It’s like your phone's contact list – you don’t memorize numbers, just names.

5. What is the difference between TCP and UDP?

TCP (Transmission Control Protocol): Reliable, sends data in order, and checks for errors. Used for things like emails and web browsing.

UDP (User Datagram Protocol): Faster but less reliable. Used for streaming videos or online games.

6. What is a Router? A router connects different networks together and directs data where it needs to go. It's what allows you to use Wi-Fi at home.

7. What is OSI Model? Can you explain its layers? The OSI Model is a framework that shows how data travels over a network. It has 7 layers:

Physical

Data Link

Network

Transport

Session

Presentation

Application Think of it like a ladder where each step adds more meaning to the data.

8. What is the difference between HTTP and HTTPS? HTTPS is just like HTTP, but secure. The “S” stands for Secure. It uses encryption to protect your data.

9. What is a MAC address? A MAC address is a unique hardware ID for your device's network card. Think of it like a digital fingerprint.

10. What is a Firewall? A firewall is a security system that monitors and controls incoming and outgoing network traffic. It helps protect your system from hackers or unwanted access.

📌 Need more? We’ve covered more in-depth questions along with real examples and diagrams on our blog here 👉 🔗 Read Full Blog - Computer Network Interview Questions & Answers

Recently, I started looking at job postings. I have been at my current role for 2 and half years and I have seen the workplace change. Work policies around scrutiny and remote work have regressed and I am not a big fan of those changes. There are hardly any jobs in the market. I feel a slight remorse because I changed my career to become an Android developer but now it feels like the role has…

Getting a technical interview job that you really want is often dependent on how well you perform. There is strong rivalry for the best talent in India’s booming tech sector. This blog gives developers like you the tools you need to crack technical interviews and make an impression on potential employers.

Understanding the Indian Technical Interview Scene (2024)

In India, the world of technical interviews is continuously changing. An overview of what to anticipate is provided here:

Focus on Problem-Solving Skills: Employers are seeking more and more developers with the ability to analyze problems critically, dissect them, and come up with workable solutions. Refresh your knowledge on how to solve problems!

Data Structures & Algorithms: It is still essential to have a strong foundation in these concepts. Prepare to use code challenges to show that you grasp the material. Good practice resources are available on well-known websites like LeetCode and GeeksForGeeks.

Coding Proficiency: Demonstrate your ability to produce clear, effective, and well-documented code by writing code in your favorite language (Python, Java, or C++).

Proficiency in System Design for Mid-Senior Positions: Expect inquiries about system architecture, scalability, and managing big datasets as your career develops.

Developing Your Technical Interviewing Skills:

Now that you know what to anticipate, let’s move on to practical tactics:

There is no replacement for regular practice — practice, practice. For coding challenges and practice interviews, use websites such as Interview Cake and HackerRank.

Review of Algorithms & Data Structures: Examine fundamental data structures such as trees, graphs, linked lists, and arrays. Develop your knowledge of algorithms for dynamic programming, sorting, and searching.

Emphasis on Frequently requested Technical Interview Questions: For your selected programming language, research and prepare answers to commonly requested technical interview questions.

Improve Your Communication Skills: Technical interviews evaluate both your communication style and your coding abilities. Clearly state your reasoning and provide a thorough explanation of your code.

Get ready for questions about behavior: Be prepared to respond to inquiries regarding your prior projects, methods for overcoming problems, and experiences working in a team.

Project Showcase: To highlight your abilities and enthusiasm for learning, think about putting together a portfolio or showcasing a few of your own projects.

Research the Company: It demonstrates initiative and sincere interest in the position to be aware of the work culture, technology, and products of the company.

Mock Interviews: It takes practice to get good! To hone your interviewing techniques and boost your self-assurance, practice interviews with friends, coworkers, or internet resources.

Additional Tips for Indian Developers:

Make Use of Online Resources: The developer community in India is thriving. For information exchange and interview preparation advice, make use of local meetups, online forums, and groups like Interview Cake India.

Focus on Soft Skills: Although technical proficiency is necessary, don’t undervalue the significance of soft skills like communication, teamwork, and time management.

Get Ready for Aptitude Tests: To evaluate applicants’ analytical and logical thinking abilities, certain organizations may administer aptitude tests. To do well on these tests, practice with online tools.

Conclusion:

A strategic approach, preparation, and dedication are necessary to crack the technical interview. You’ll be well-prepared to wow prospective employers and land your ideal developer job if you follow to these tactics and keep up with the most recent developments in the Indian IT industry!

A list of educative.io free courses I want to look at eventually

-complete list https://www.educative.io/explore/free this guy is my hero https://github.com/the-prksh/educative-courses

python 3 -learn python 3 https://www.educative.io/courses/learn-python-3-from-scratch -data structures https://www.educative.io/courses/data-structures-with-generic-types-in-python -algorithms https://www.educative.io/courses/mastering-algorithms-for-problem-solving-in-python -visual guide to algorithms https://www.educative.io/courses/visual-introduction-to-algorithms

SQL -learn SQL https://www.educative.io/courses/learn-sql-from-scratch

system design -learn system design https://www.educative.io/courses/system-design-interview-handbook

behavioral interview -https://www.educative.io/courses/grokking-the-behavioral-interview

HTML/CSS/JS -learn HTML/CSS/JS https://www.educative.io/courses/learn-html-css-javascript-from-scratch

I didn’t know it was going to be a technical interview. They didn’t say it was and when I told my mom I was worried it might be, she was like, “nah, no way, they’re just going to ask you about your experience.” It was a freaking technical interview.

They gave me two minutes to plan a five minute lesson on recursion and then had me “teach” it. They also had me do the Fizzbuzz test (easy) and program a class (I forgot the syntax for the constructor because ✨ anxiety ✨ but I think I guessed correctly). This was just…super unexpected. The questions weren’t difficult, but I hate getting out on the spot and it was terrifying.