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Database development test for hiring

Review how developers reason about relational data, schemas, concurrent sessions, and index choices in standard SQL.

10 دقيقة
15 سؤالًا
Intermediate
Multiple choice
Questions in الإنجليزية
Phone and desktop

Use this test free See the question formats

الإجابة المختصرة

The Database Development test is an intermediate, 10-minute check for developers who build or maintain relational databases. Its 15 multiple-choice questions use small tables, schemas, and SQL snippets to assess query results, schema design, transactions, and indexes in standard SQL, without vendor-specific features.

ما الذي يقيسه

Reasoning about relational data, query results, schema design, transactions and indexes in standard SQL.

Relational modeling and query results

Candidates read small tables and SQL snippets to decide what a query returns.

Schema design and normal forms

Candidates consider how a schema should be split and how normal forms apply.

Transactions and concurrency

Candidates reason about what happens when two sessions run at the same time.

Indexes and query performance

Candidates choose an index that helps a given query.

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

Developers who build and maintain relational databases: database developers, backend and full-stack engineers, data engineers, and people who manage or review database work.

What this test can show

Tracing a query by hand
Candidates work out what a query returns from small tables, showing whether they can predict a result, not only write SQL that looks right.
Two sessions at once
Transaction questions ask what happens when two sessions run at the same time, a skill that is hard to judge from a resume.
Splitting a schema
Schema questions show whether a candidate can see where a table should be split and apply normal forms to a concrete design.
No vendor advantage
Every question is written in standard SQL with no vendor-specific features, so a candidate who learned on one database product is not favored over another.

What you get for each candidate

Example report (fictional data)Database Development

81‎%‎Percentile 68. Benchmark: HireValid candidates, n = 340

Relational modeling and query results88‎%‎

Schema design and normal forms77‎%‎

Transactions and concurrency70‎%‎

Indexes and query performance87‎%‎

Integrity Scoreثقة عالية

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

Each candidate receives a different set of questions from large question pools. Question order and answer options are shuffled, and the browser shows one question at a time. The server controls timing, so reloading returns the same question with only the remaining time. Question text cannot be copied or selected. HireValid records signals such as time away from the test tab, pastes into answers, and answers faster than a question can be read, then summarizes them in an Integrity Score and evidence timeline for employer review. It does not decide on its own. With candidate consent, an employer can add webcam photos at random moments. See the pre-employment testing guide for guidance on using test evidence.

كيف نمنع الغش باستخدام الذكاء الاصطناعي · Integrity signals

Use the score as one piece of evidence

Review the score alongside a job-relevant work sample and a structured interview. For a work sample, you could ask the candidate to reason through a small schema or SQL scenario similar to the skills covered here. The score is evidence for a person to review, not a decision on its own. Compare the coverage with SQL Coding: Querying and read how we build our tests when choosing an assessment.

أسئلة المقابلة المنظّمة

Walk me through how you check what a query will return before you run it against real data.
Listen for a step-by-step way of tracing the SQL against the rows, rather than a definition of a query.
Tell me about a schema you split, or would split. What problem did the split solve, and what did it cost?
Listen for reasoning about the structure and its tradeoffs.
Describe a time two processes changed the same data at once. What happened, and what did you do about it?
Listen for attention to concurrent behavior and transactions, and how the fix was checked.
How do you decide whether a new index is worth adding for a slow query?
Listen for reasoning tied to the query and to what the index costs.

Understand scoring and benchmarks

Fairness and accommodations

Questions use neutral schemas such as orders, rooms, shipments and staff rosters, with names from many backgrounds, no money symbols and no local knowledge. All code is standard SQL, so no particular database product is favored, and behavior that differs between products is never the basis of an answer. The reading level is kept plain, and scratch paper is allowed for every candidate.

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.

اقرأ نهجنا في الإنصاف

Test details

A short, timed check of practical relational database skills for working developers. Candidates read small tables, schemas and SQL snippets and decide what a query returns, how a schema should be split, what happens when two sessions run at once, and which index helps a query. Every question is written in standard SQL with no vendor-specific features.

Questions are in English.
Aids allowed: Scratch paper.
Each question is answered once, in order, with no going back.
4 practice questions, 4 minutes, before the timed test.

الأسئلة الشائعة

How does the Database Development test keep SQL questions neutral?+

It uses standard SQL and neutral schemas such as orders, rooms, shipments, and staff rosters. Names come from many backgrounds, questions use no money symbols or local knowledge, and behavior that differs between database products is never the basis of an answer.

Can candidates use scratch paper or try the Database Development practice set?+

Yes. Scratch paper is allowed for every candidate. The practice set has 4 questions and takes 4 minutes, so candidates see how the schemas and SQL snippets are shown before the timed test.

Which roles suit the intermediate Database Development test?+

It is intended for developers who build and maintain relational databases: database developers, backend and full-stack engineers, data engineers, and people who manage or review database work. Questions sit at an intermediate level, such as reading a schema, predicting a query result and choosing an index for a given query.

Can candidates go back or use a phone on the Database Development test?+

Candidates can take the test on a phone or a desktop. Each of the 15 questions is answered once, in order, with no going back, so a candidate commits to what a query returns or what a second session sees before moving on. Some questions have one correct answer and others ask for every option that applies.