What does JavaScript primarily run on?

• A. Web Server
• B. Browser
• C. Database
• D. Operating System

Which keyword is used to declare a variable in JavaScript?

• A. var
• B. dim
• C. let
• D. Both A and C

Which of the following is NOT a JavaScript data type?

• A. String
• B. Number
• C. Boolean
• D. Character

How do you write a comment in JavaScript?

• A. <!-- comment -->
• B. // comment
• C. /* comment */
• D. Both B and C

Which symbol is used for strict equality in JavaScript?

• A. =
• B. ==
• C. ===
• D. !=

Which of these is a new variable declaration keyword introduced in ES6?

• A. var
• B. let
• C. const
• D. Both B and C

Which ES6 feature allows destructuring arrays and objects?

• A. Spreading
• B. Template literals
• C. Destructuring assignment
• D. Arrow functions

How do you write an arrow function?

• A. function => {}
• B. () => {}
• C. => () {}
• D. () -> {}

What is the purpose of `Promise` in JavaScript?

• A. Handle synchronous tasks
• B. Handle asynchronous tasks
• C. Handle CSS animations
• D. Handle JSON

Which method is used to handle resolved promises?

• A. .catch()
• B. .then()
• C. .finally()
• D. .resolve()

What is a closure in JavaScript?

• A. Function inside a loop
• B. Function with access to outer scope
• C. Blocked code
• D. Unused variable

Which method changes the prototype of an object?

• A. Object.assign()
• B. Object.setPrototypeOf()
• C. Object.create()
• D. Object.defineProperty()

What is the value of `this` in strict mode when called in a function?

• A. window
• B. undefined
• C. null
• D. global

Which design pattern ensures only one instance of a class?

• A. Factory
• B. Singleton
• C. Observer
• D. Prototype

Which method creates a deep clone of an object?

• A. Object.assign()
• B. JSON.parse(JSON.stringify())
• C. clone()
• D. deepCopy()