Back-End Developer
Role: Back-End Developer
Tests REST API design, relational and non-relational databases, security, performance and scalability of server-side systems. Intended for technical screening of back-end developers.
Sample questions
Taken from the template itself. Questions with a recorded answer key are left out, so reading this page cannot help anyone pass the test.
As the candidate sees it
Back-End Developer
- 1.Short text
What is the property of an operation that has the same effect whether it runs once or many times?
Example: a client resends the same payment request after a timeout, and the server must not charge twice. Answer with the term.
- 2.Long text
How would you diagnose and fix database saturation caused by a balance lookup endpoint?
After a launch, the balance lookup endpoint started receiving 50 times more requests and the database is saturated. Explain how you would diagnose the problem and what changes you would make to the architecture (caching, read replicas, rate limiting, queues or others), with the trade-offs of each. Be specific about the order of actions.
- Shown once you copy the template
- Shown once you copy the template
- Shown once you copy the template
5 more questions in the full template.
How this template was made, and what you can check
Are these the real questions?
Yes. The questions on this page are the questions a candidate gets. They are not samples written for the site: they come from the template itself, word for word.
Why are some questions missing from this page?
Any question with a recorded answer key is left out, so that reading this page cannot help anyone pass. The count of what is missing is shown; the questions themselves appear once you copy the template.
Which language does the candidate see?
Every template exists in English and Portuguese. The candidate answers in theirs and you read in yours.
Will this template work on my plan?
Question types are checked against your plan by the database itself, so a template never promises a type your plan cannot run. Building assessments and collecting answers is free; automatic scoring starts on the Starter plan.
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Use this template on your next opening
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What comes back to you
Short text
What is the property of an operation that has the same effect whether it runs once or many times?
Answer
Score
Why this score
The question is real. The answer and the score are drawn as an example of what a review looks like.