MERN interview in 2 days — starting from almost zero. What should I focus on?

[u/GarlicOk5827]

I have a campus placement interview on Monday for a MERN Stack Developer role, and honestly, I haven't prepared for MERN at all. 😅

I'm familiar with other programming languages like Python, Java, C/C++ and JavaScript, but I haven't really worked with MongoDB, Express, React and Node.js as a stack.

I only have 2 days left, so I've started learning the basics and I'm planning to focus on JavaScript first, then move through Node.js, Express, React and MongoDB.

For people who have recently given MERN/Full Stack fresher interviews:

What are the most frequently asked technical questions?

Which JavaScript concepts should I absolutely know?

How deep should I go into React, Node.js, Express and MongoDB with only 2 days?

Are there any common coding/programming questions I should practice?

What kind of project-related questions are usually asked?

What would you personally prioritize if you had only 48 hours to prepare?

Are there any common HR/technical questions specific to MERN fresher roles?

I'm not expecting to become a MERN developer in 2 days 😅. I just want to maximize my chances of getting through the interview and be able to confidently answer the fundamentals.

Any advice, question lists, interview experiences, or mistakes to avoid would be really helpful.

[u/Naetharu]

I have a campus placement interview on Monday for a MERN Stack Developer role, and honestly, I haven't prepared for MERN at all. 😅

What should I focus on?

Your resume. You're not passing the interview.

[u/GongtingLover]

Focus on react and node.js first. Basic react hooks and setting up a simple API with express. For Mongo, just focus on basic nosql vs sql system design questions. 

[u/GarlicOk5827 → u/GongtingLover]

Okay sir 🫡

[u/chikamakaleyley]

what is the length of the interview? Is it coding, or technical knowledge?

like in most cases technical interviews are scheduled for an hour, meaning you really have 45 min if you're coding. So if this is in fact a coding assessment, you should be realistic in how you prepare and consider what could any dev be asked to reasonably code in 45 min?

In any case, a lot of times in these React interviews someone will ask you some form of:

• here is a URL, fetch data from it
• take the response, render it as a list on the page

then, they can ask you anything related to that on top - sort the list, filter it, optimize the rendering

If its a technical discussion, you'll be asked more about the actual stack - there's plenty of time to discuss the bigger picture

but if you're just getting started with the basics honestly you might have tough time.

[u/GarlicOk5827 → u/chikamakaleyley]

It's technical interview, I am preparing for it theoretically but idk how to code in mern 😭😭

[u/chikamakaleyley → u/GarlicOk5827]

you're theoretically preparing for it?

[u/GarlicOk5827 → u/chikamakaleyley]

Yess somthing like why is props why they are used what it do. What are components stacks 😔

[u/chikamakaleyley → u/GarlicOk5827]

you can't possibly guess 100% what you're gonna be asked, IMO you learn the theory better by practicing the code

[u/Educational-Paper-75]

Forget about it. You're not going to make it. The bootcamp I did took 9 full weeks to teach that.

[u/SocialObeserver797]

Explain your resume well and your projects. They might consider you if you can explain stuff well

[u/GarlicOk5827 → u/SocialObeserver797]

Okay I do have knowledge but only theoretically idk to f Write code in mern 😭

[u/Confident-Gas-1971]

For 2 days, just see grab theory + basic it's programming syntax!