Proficiency Tests & Verifiable Certificates

Practice with curated, time-boxed quizzes. Score well to unlock a shareable certificate—perfect for LinkedIn.

🕑 10 minutes each
🧩 20 questions
🏅 Shareable certificate

How Certificates Work Practice Coding Challenges

What’s covered?

Each test focuses on fundamentals interviewers care about:

Core language/framework concepts
Real-world scenarios & gotchas
Best practices, performance & debugging

Choose a stack to take the exam!

Java

Issued by Tech Venture LLC

OOP & inheritance, exceptions, generics, collections, I/O, concurrency, JVM memory model, best practices.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

JavaScript

Issued by Tech Venture LLC

Scope & closures, this, prototypes, async/await & promises, event loop, modules, DOM, performance.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

SQL

Issued by Tech Venture LLC

SELECT/JOIN/GROUP BY, window functions, normalization, indexes & query plans, transactions & isolation.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Collection API

Issued by Tech Venture LLC

List/Set/Map semantics, iterators, equals/hashCode, comparators, concurrency-safe collections, perf trade-offs.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Spring

Issued by Tech Venture LLC

IoC/DI, bean lifecycle, MVC & REST, AOP, Data/JPA, transactions, Boot autoconfig, validation & testing.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Hibernate

Issued by Tech Venture LLC

Entity mapping, relationships/cascades, fetching, JPQL/Criteria, caching, transactions, tuning & pitfalls.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

React

Issued by Tech Venture LLC

JSX, state/props, hooks (useState/useEffect/useMemo), context, reconciliation, performance, testing.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Angular

Issued by Tech Venture LLC

Components/templates, DI, forms, RxJS/observables, routing/guards, change detection, testing.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Java 8 Features

Issued by Tech Venture LLC

Lambdas, functional interfaces, streams, Optional, Date/Time API, default/static methods, method refs.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Python

Issued by Tech Venture LLC

Data model, comprehensions, iterators/generators, OOP/dataclasses, typing, stdlib, venv, asyncio.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Kafka

Issued by Tech Venture LLC

Topics/partitions, producers/consumers, delivery semantics, retention/compaction, schema, Streams/KSQL.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Cassandra

Issued by Tech Venture LLC

Query-first modeling, partition/clustering keys, replication/CL, compaction/TTL, LWT, drivers & tuning.

🕑 10 minutes
🧩 20 questions
🏅 Shareable certificate

Tip: Each certificate is fully tappable—just tap a topic to start the exam.