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MongoDB
Practice questions for the skills this job lists, plus common questions for any interview. These are for practice: we don’t know the employer’s actual questions.
What is the difference between a list and a tuple, and when would you use each?
Python
How do generators work, and why would you use one over a list?
Python
How do equals() and hashCode() work together in a HashMap?
Java
Explain the difference between checked and unchecked exceptions.
Java
Explain the event loop: what happens between a setTimeout callback and a resolved promise?
JavaScript
What is a closure? Give an example where one is useful.
JavaScript
Explain RAII and smart pointers. When would you use unique_ptr versus shared_ptr?
C++
Explain async/await in C# and what can cause a deadlock.
C#
When would you embed documents versus reference them in MongoDB?
MongoDB
How does Node handle many concurrent requests on a single thread?
Node.js
How would you structure error handling in an Express or Fastify API?
Node.js
A customer says the product is 'broken'. How do you troubleshoot with them?
This kind of role
What do you know about MongoDB's products and customers?
MongoDB
Tell me about yourself in two minutes, focused on this role.
About you
Why this company, and why this role?
About you
Tell me about a time you disagreed with a teammate. What happened?
About you
Describe a time you failed or missed a deadline, and what you changed afterwards.
About you