Top ReactJS Questions & Practice
Master 60 essential ReactJS questions ranging from core fundamentals to senior-level real-world scenarios.
Junior Fundamentals — Question 1
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What is React?
Junior Fundamentals — Question 2
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What is JSX?
Junior Fundamentals — Question 3
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What is a React component?
Junior Fundamentals — Question 4
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What are props?
Junior Fundamentals — Question 5
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What is state?
Junior Fundamentals — Question 6
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
Why should render logic be pure?
Junior Fundamentals — Question 7
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What does a key identify in a React list?
Junior Fundamentals — Question 8
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
Why are stable IDs preferred over array indexes as keys?
Junior Fundamentals — Question 9
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What does useState return?
Junior Fundamentals — Question 10
Key Takeaways
- Explain the underlying React mental model.
- Connect the answer to a production scenario.
Knowledge Check
What does a state setter do?