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3,014 questions • 21 technologies • 11 roles
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Every category combines short express tests and deeper skill assessments, so you can quickly check a topic or build confidence over time.
  • 3,014questions
  • 1,990topics
  • 21technologies
Javascript
+23 questions in the last 30 days
3 tests • 395 questions39 skills • 4 target roles
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Embedded development
+0 questions in the last 30 days
1 tests • 338 questions18 skills • 2 target roles
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Linux / Unix / Bash / Shell / CLI
+0 questions in the last 30 days
1 tests • 298 questions6 skills • 1 target roles
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Swift (IOS Developer)
+168 questions in the last 30 days
1 tests • 233 questions13 skills • 1 target roles
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NodeJS
+0 questions in the last 30 days
1 tests • 224 questions19 skills • 2 target roles
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TypeScript
+4 questions in the last 30 days
2 tests • 195 questions15 skills • 4 target roles
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CSS
+6 questions in the last 30 days
2 tests • 184 questions7 skills • 2 target roles
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ReactJS
+0 questions in the last 30 days
2 tests • 161 questions16 skills • 3 target roles
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Explore all 21 technologies
Target roles

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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
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  • Middle Developer
Backend Developer NodeJS5 skillsSkills to practice
  • GIT
  • Javascript
  • NodeJS
  • SQL databases
  • TypeScript
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  • 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
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  • 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
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Skill test
Embedded development: Electronics Basics

Test your understanding of basic electronics concepts for junior embedded developers, including voltage, current, resistance, Ohm’s law, simple series and parallel circuits, diodes, transistors, voltage dividers, and pull-up and pull-down resistors.

20 questions • ~23 min
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Skill test
AI Engineering Middle level

Assess your practical AI engineering skills at the Middle level. This test covers LLM integration, prompt and context engineering, structured outputs, embeddings, vector search, RAG, AI agents, evaluation, observability, safety, and production reliability. It is designed for developers who build and maintain real-world AI-powered applications

20 questions • ~23 min
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Express test
Express test JavaScript: Middle level

Check your abilities and showcase the expertise in JavaScript coding with our platform, join us to 
take the JavaScript knowledge to the next level!

20 questions • ~23 min
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Skill test
PCB Design Fundamentals for Hardware Engineers

This beginner-level test evaluates foundational PCB design knowledge for hardware engineers. It covers schematic interpretation, component selection, PCB libraries, board planning, component placement, basic routing, power and ground design, design-rule verification, and manufacturing outputs. Questions focus on practical decisions required to create simple, reliable, and manufacturable printed circuit boards while avoiding common schematic and layout mistakes.

20 questions • ~23 min
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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.

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