MongoDB

MongoDB is the leading modern, general purpose database platform, designed to unleash the power of software and data for developers and the applications they build. Headquartered in New York, MongoDB has more than 26,800 customers in over 100 countries. The MongoDB database platform has been downloaded over 175 million times and there have been more than 1.5 million registrations for MongoDB University courses.

Interview Questions

Learn and Practice on almost all coding interview questions asked historically and get referred to the best tech companies.

Problem Title

Exp

Difficulty

Avg. time

Attempted

Upvotes

Reverse Pairs

120

Hard

50 mins

16.9k

171

Find Number Of Islands

Moderate

34 mins

12.1k

171

Merge overlapping intervals

Easy

10 mins

5.9k

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Interview Experiences

Gain the Edge You Need at your next technical interview with Coding Ninjas.s unlimited interview problems practices for MongoDB

Upvote

MongoDB | Data Engineer-Intern | Fresher | Sep 2021

Published on 26 Feb 2022

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MongoDB | SDE - Intern | Fresher | Jul 2025

Published on 4 Dec 2025

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Guided Paths

Here is your ultimate guide for cracking your dream job interview, you can choose your tracks and start preparing for MongoDB

Data structures & algorithms (Beginner to Intermediate)

If you are a complete beginner to data structures / want quick content to revise and practise questions for placements, this is the guided path for you . This guided path covers the absolute basics introducing every data structure, its need and then checks your understanding with relevant coding questions and mcqs to solve, so that you can have an all round understanding of the concepts studied.