SQL Certification Test (Basic)
A free 35-minute SQL skill test at basic level. Pass with 60% to earn a verifiable CodeKairo credential and a profile frame.
- Skill: SQL
- Level: Basic
- Duration: 35 minutes
- Questions: 30
- Pass mark: 60% (distinction at 85%)
- Credential: Verifiable, valid for 2 years
Selecting, filtering, sorting, joining and grouping: read a query against the tables given and say exactly what it returns.
Sections
| Section | Questions | Time | Kind | Marks each |
|---|---|---|---|---|
| Queries | 30 | 35 min | Multiple choice | 1 |
What it covers
- SELECT & filtering — practise with OS, DBMS & Networks MCQs
- Joins — practise with OS, DBMS & Networks MCQs
- Aggregation & GROUP BY — practise with OS, DBMS & Networks MCQs
- Subqueries & CTEs — practise with OS, DBMS & Networks MCQs
- Set operations — practise with OS, DBMS & Networks MCQs
- NULL handling — practise with OS, DBMS & Networks MCQs
- Tables & constraints — practise with OS, DBMS & Networks MCQs
- Indexes & performance — practise with OS, DBMS & Networks MCQs
- Normalization — practise with OS, DBMS & Networks MCQs
Rules
This is a certification test. Pass with 60% and you earn a verifiable CodeKairo credential — 85% earns it with distinction. It is valid for 2 years.
- The sections are timed separately and taken in order. A section you leave cannot be reopened.
- The server keeps the clock. Closing the tab or reloading does not pause it.
- Your answers save as you go and survive a refresh.
- You may sit this test again 7 days after a sitting ends. Your best result stands.
Integrity. Work alone and from what you know. Pasting into the editor is switched off during the test, and leaving the test tab is recorded. A sitting that looks assisted can be reviewed, and a credential earned that way is revoked.
The answers are never shown — not during the test and not after it. Your result breaks the score down by topic and points you to what to practise.