JavaScript: 30 MCQs questions
Test your JavaScript knowledge with these 30 MCQ questions. They cover the fundamental concepts of JavaScript and are perfect for beginners, students, and aspiring web developers.
Test Your Knowledge Quiz
Q1. What is JavaScript?
Q2. Who created JavaScript?
Q3. In which year was JavaScript created?
Q4. Which company originally developed JavaScript?
Q5. JavaScript is mainly used for?
Q6. Which keyword is used to declare a variable in modern JavaScript?
Q7. Which keyword creates a constant variable?
Q8. Which symbol is used for single-line comments?
Q9. Which method displays output in the browser console?
Q10. Which function shows a popup alert box?
Q11. Which data type stores true or false values?
Q12. Which operator checks both value and data type?
Q13. Which loop repeats while a condition is true?
Q14. Which loop is commonly used when the number of iterations is known?
Q15. Which JavaScript structure stores multiple values?
Q16. Which object represents an HTML document?
Q17. Which method selects an element by its ID?
Q18. Which event occurs when a user clicks an element?
Q19. Which keyword is used to define a function?
Q20. Which ES6 feature provides a shorter syntax for writing functions?
Q21. Which keyword is used to handle asynchronous operations?
Q22. Which object is used to make HTTP requests in modern JavaScript?
Q23. Which storage keeps data even after the browser is closed?
Q24. Which storage clears data when the browser tab is closed?
Q25. Which framework is built on JavaScript?
Q26. Node.js allows JavaScript to run on?
Q27. Which method converts JSON text into a JavaScript object?
Q28. Which method converts a JavaScript object into JSON format?
Q29. Which company maintains the V8 JavaScript Engine?
Q30. Why is JavaScript considered one of the most popular programming languages?