Tech interview questions & skill tests.Get interview-ready for Frontend, Backend, DevOps, Data, and Embedded roles

Practice with focused micro-tests, track progress for your target role, and close knowledge gaps before the interview.

Explore our testsChoose your target role
  • +6
2,931 questions • 21 technologies • 11 roles
Practice 21+ technologies
Explore by technology

Choose a technology.
Test the skills that matter.

Every category combines short express tests and deeper skill assessments, so you can quickly check a topic or build confidence over time.
  • 2,931questions
  • 1,990topics
  • 21technologies
Javascript
+22 questions in the last 30 days
3 tests • 394 questions39 skills • 4 target roles
See tests
Embedded development
+112 questions in the last 30 days
1 tests • 338 questions18 skills • 2 target roles
See tests
Linux / Unix / Bash / Shell / CLI
+0 questions in the last 30 days
1 tests • 298 questions6 skills • 1 target roles
See tests
NodeJS
+16 questions in the last 30 days
1 tests • 224 questions19 skills • 2 target roles
See tests
Swift (IOS Developer)
+158 questions in the last 30 days
1 tests • 223 questions13 skills • 1 target roles
See tests
TypeScript
+4 questions in the last 30 days
2 tests • 195 questions15 skills • 4 target roles
See tests
CSS
+6 questions in the last 30 days
2 tests • 184 questions7 skills • 2 target roles
See tests
ReactJS
+0 questions in the last 30 days
2 tests • 161 questions16 skills • 3 target roles
See tests
Explore all 21 technologies
Target roles

Train for the role you want next

Choose a market-relevant target role and practice the skills it requires with focused micro-tests. Turn a few spare minutes into measurable career progress.
  • Middle Developer
AI engineer Middle1 skillSkills to practice
  • AI Engineering
Practice this role
  • Middle Developer
Backend Developer NodeJS5 skillsSkills to practice
  • GIT
  • Javascript
  • NodeJS
  • SQL databases
  • TypeScript
Practice this role
  • Junior Developer
DevOps Engineer JuniorDevOps Engineer supports software delivery and infrastructure operations by working with Linux and Unix systems, Bash and shell scripting, Git, Docker, CI/CD pipelines, networking fundamentals, and basic cloud services. This role focuses on automating routine tasks, maintaining development and deployment environments, monitoring applications, troubleshooting common issues, and collaborating with development and operations teams to deliver software reliably.3 skillsSkills to practice
  • Docker
  • GIT
  • Linux / Unix / Bash / Shell / CLI
Practice this role
  • Junior Developer
Embedded Developer JuniorA Junior Embedded Developer is expected to understand the fundamentals of firmware development for microcontroller-based systems, write and read basic C code, work with simple peripherals and communication interfaces, and follow existing patterns for drivers, interrupts, and hardware interaction. At this level, the engineer should be able to implement and debug straightforward embedded tasks with guidance, understand common constraints such as memory and timing, and explain the behavior of typical low-level code used in real device-oriented environments.2 skillsSkills to practice
  • Electronics Basics
  • Embedded development
Practice this role

+7more roles

From QA to ML — find the role that fits your next step.
Explore all 11 roles
Popular tests

Start with the tests
engineers take most

Explore all tests
Skill test
Embedded Developer

Embedded Development covers the design and programming of software that runs directly on hardware devices. This category includes microcontrollers, real-time systems, sensors, communication protocols, memory management, hardware interfaces, debugging, and performance optimization for resource-constrained environments.

20 questions • ~23 min
Start test
Express test
GIT express knowledge test

GIT skills are a must-have for software developers. Git, one of the most popular source control tools, can help manage changes in code over time

20 questions • ~23 min
Start test
Skill test
Cybersecurity for Full-Stack developers (React.js + Node.js)

Cybersecurity test for Full-Stack developers (React.js + Node.js), focused on interview preparation. Covers secure authentication and authorization, common web vulnerabilities, API and session security, frontend and backend attack vectors, data protection, and practical security decisions in modern full-stack applications.

20 questions • ~23 min
Start test
Express test
Express test CSS

CSS Express Test is a quick skill check that covers the fundamentals of styling and layout: selectors and specificity, the cascade and inheritance, the box model, positioning and stacking contexts, Flexbox and Grid basics, responsive design with media queries, typography and units, and common UI patterns like centering, spacing, and simple transitions/animations.

20 questions • ~23 min
Start test
How it works

From first test to interview-ready

  1. 1Take a skill check

    A short test shows your current level in a few minutes.

  2. 2Pick a target role

    See every skill the role requires, grouped by category.

  3. 3Close the gaps

    Practice focused tests exactly where you are weakest.

  4. 4Walk in confident

    Track your progress until you are interview-ready.

Ready to see where you stand?

A 5-minute skill check shows your level and the gaps to close first.
Take a free skill checkExplore all our tests