PROGRAMMING SKILLS

Flask test for hiring

See how candidates interpret Flask code used to build and maintain Python web applications.

10 minutes
15 questions
Intermediate
Multiple choice
Questions in English
Phone and desktop

Use this test free See the question formats

The short answer

The Flask test is an intermediate, timed check of practical Flask skill for Python web developers, Flask developers, and back-end or full-stack developers who build or maintain Flask applications. Candidates read short code snippets and choose what they do, what is wrong, or which change fixes them. It measures routes and templates, authentication, database and API work, testing, and deployment.

What it measures

Practical Flask skill: routing and templates, authentication, database and API work, testing and deployment.

Routing, requests and templates

Candidates interpret short application code about handling routes and requests and using templates.

Authentication and security

Questions cover application code for logins and sessions, including authentication and security.

Databases and REST APIs

Candidates work with code involving database access and JSON APIs.

Testing and deployment

Questions address testing a Flask app and running it in production.

Question formats

Multiple choice

The candidate: Reads a short situation, table or statement and picks the right answer, or every right answer.

You see: Whether the candidate knows the material well enough to apply it, not just recognize it.

15 questions in 10 minutes, served one at a time.

Roles this test fits

Python web developers, Flask developers, back-end and full-stack developers who build or maintain Flask applications.

What the Flask test can show

Code-based evidence
Candidates interpret small pieces of application code and choose what they do, what is wrong, or which change fixes them, giving you evidence beyond a resume's description of Flask experience.
Security flaws in real code
Login and session snippets ask what is wrong and which change fixes it, so you see whether a candidate spots a security problem in Flask code, not just names one.
Fair, familiar scenarios
Short snippets use plain US English and everyday, culture-neutral app settings such as booking tools, inventories, and task trackers, without idioms or local knowledge.

What you get for each candidate

Example report (fictional data)Flask

69%Percentile 42. Benchmark: HireValid candidates, n = 1,579

Routing, requests and templates58%

Authentication and security77%

Databases and REST APIs56%

Testing and deployment83%

Integrity ScoreHigh confidence

Stayed on the test tab throughout
No pasted answers
Answered at a steady pace

Scores, profiles and integrity signals are evidence for you to review alongside an interview, never an automatic decision.

Use this test free

Test integrity signals for review

Each candidate receives a different set of questions from large question pools, with question order and answer options shuffled. The browser shows one question at a time, and answer keys stay on HireValid's servers. The test is timed on the server; reloading restores the same question with only the time left, and candidates cannot go back. Question text cannot be copied or selected, and a blocked copy attempt is recorded. HireValid may summarize signals such as time away from the test tab, pastes into answers, and answers faster than a question can be read in an Integrity Score with an evidence timeline for employer review. It does not decide on its own. Learn about how we build our tests and our pre-employment testing guide.

How we prevent AI cheating · Integrity signals

Use the score as evidence

Review the score alongside a work sample that reflects the Flask work in the role, such as interpreting application code involving routes, sessions, databases, or testing. Then use a structured interview to ask every candidate comparable, job-related questions. The score is one signal for your review, not a hiring decision or cutoff. If you are comparing frameworks, see Django REST Framework (DRF).

Structured interview questions

A Flask route receives a request but renders the wrong information. How would you investigate it?
Listen for a clear approach to following the route, request, and template code and identifying what change to test.
How would you review a Flask app's login and session code before changing it?
Listen for attention to the authentication and security behavior in the code, and a reasoned way to check the effect of a change.
How would you investigate a problem involving database access or a JSON API in a Flask app?
Listen for a step-by-step way to inspect the relevant code and use testing to check a proposed fix.

Understand scoring and benchmarks

Fairness and accommodations

Questions are short code snippets with plain US English around them, written at the reading level of everyday developer work, with no idioms or local knowledge. The apps in the scenarios, such as booking tools, inventories and task trackers, are everyday and culture-neutral, and any names in them come from many backgrounds. Each question tests one skill a Flask developer uses on the job, not trivia about rarely used options.

You can give any candidate extra time as an accommodation. Results are evidence for a person to review, never an automatic decision.

Provisional: reliability is reported once 200 candidates have completed it.

Read our fairness approach

Test details

A short, timed check of practical skill with the Flask web framework for Python. Candidates read small pieces of application code and choose what they do, what is wrong with them, or which change fixes them. The questions cover routes and templates, logins and sessions, database access and JSON APIs, and testing and running an app in production.

Questions are in English.
No aids are needed.
Each question is answered once, in order, with no going back.
4 practice questions, 4 minutes, before the timed test.

Flask, Python, Jinja, SQLAlchemy, Werkzeug, pytest, Gunicorn are trademarks of their owners. HireValid is not affiliated with or endorsed by them.

Frequently asked questions

How does the Flask test keep its questions fair?+

The Flask test uses short code snippets with plain US English at the reading level of everyday developer work. Its booking, inventory, and task-tracker scenarios are culture-neutral, and questions test job-used Flask skills rather than trivia about rarely used options.

Can candidates use aids during the Flask test?+

No aids are allowed for the Flask test. Candidates answer multiple-choice questions by reading small pieces of application code about routes and templates, logins and sessions, database access and JSON APIs, or testing and running an app in production.

What practice set comes with the Flask test?+

Candidates can try a practice set of four questions in four minutes. It offers a chance to experience the Flask test's multiple-choice format, where each question asks what a code snippet does, what is wrong with it, or which change fixes it.

Which roles fit the intermediate Flask test?+

It is intended for Python web developers, Flask developers, and back-end or full-stack developers who build or maintain Flask applications. Its questions measure practical work with Flask routes and templates, authentication, database and API work, testing, and deployment.