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Vetted assessment library

Backend & APIs

The skills a Backend & APIs vetted assessment can cover, how the assessment runs, and a sample question to try.

Skills covered

Each talent declares the skills they have, and each sitting is generated for their target role and those skills. These are skills from this field that an assessment can cover.

  • GraphQL
  • Authentication
  • Authorization
  • OAuth 2.0
  • Rate Limiting
  • Caching Strategies
  • Message Queues
  • Webhooks
  • Idempotency
  • Pagination

Sample question

Why should a webhook receiver verify the request signature before it processes the payload?

  1. ATo make the request arrive faster
  2. BTo compress the payload before it is stored
  3. CTo confirm the request came from the expected sender and was not altered in transit
  4. DTo convert the payload into a different format
Show the answer

C. To confirm the request came from the expected sender and was not altered in transit

Anyone who knows the endpoint URL can send it a request. Checking the signature first means forged or tampered payloads are rejected before they can change any data.

A practice-style sample of the field’s knowledge. The vetted assessment itself has no multiple-choice test today: it is an AI text interview written fresh for each sitting and, for technical roles, a coding round.

How assessments are scoredAll assessment fields

What the vetted assessment looks like

Taken once and reused for every application while your score is valid. Your track follows the skills you declare, and you can choose it yourself.

Technical track

An 8-question AI interview, then a coding round of two problems with three follow-up questions about the code just written. About 65 minutes in total.

  • AI interview40% of the vetted score
  • Coding round60% of the vetted score

Non-technical track

A 9-question AI interview, three of them workplace scenarios. About 22 minutes in total.

  • AI interview100% of the vetted score
Score validity
Your verified score stays valid for six months (180 days).
Retakes
One free early retake every 90 days; Premium adds a second.

Look around first. You can browse jobs and save the ones you like before taking the assessment. Saving a job doesn’t require it; applying does.

Browse jobsTry practice questions