Level 2 · Intermediate Programming Languages

JavaScript Professional

Validate intermediate JavaScript skills used in real-world frontend and backend development, including prototypes, the event loop, asynchronous patterns, modules, error handling, browser APIs, and performance-aware coding.

Skills Tested

Scope, Closures & Execution Context
Prototypes & Inheritance
This Binding, call/apply/bind
Event Loop, Microtasks & Macrotasks
Promises, async/await & Async Patterns
Modules & Imports/Exports
Objects, Arrays & Immutable Patterns
Error Handling & Debugging
DOM Events & Browser APIs
Performance, Memory & Common Pitfalls
Regular Expressions
Iterators & Generators

Assessment Details

Questions

78%

To Pass

50 min

Time Limit

—

Pass Rate

Questions are drawn randomly from the question pool each attempt
Answers cannot be reviewed after submission
Escalating cooldown between attempts: 8h, 24h, 72h, then 1 week
Certificates include a shareable verification token
Open Badges 2.0 compliant. Add to LinkedIn and digital wallets

$29.99

per attempt

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Track

Programming Languages → JavaScript

Part of Career Paths

JavaScript Developer

Available in Bundles

Full-Stack JavaScript Bundle Save 25%