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Questions and Answers
What is the primary role of JavaScript in web development?
What is the primary role of JavaScript in web development?
- To create backend APIs
- To add interactivity to web pages (correct)
- To style web pages
- To manage databases
What is the purpose of declaring variables in JavaScript?
What is the purpose of declaring variables in JavaScript?
- To store and manipulate data in a program (correct)
- To create an object
- To assign a fixed value to a variable
- To declare a function
What is the difference between null and undefined in JavaScript?
What is the difference between null and undefined in JavaScript?
- Null and undefined are interchangeable terms
- Null is an intentional absence of value, while undefined is an unintentional absence of value (correct)
- Null is a data type, while undefined is a variable
- Null is a number, while undefined is a string
What is the result of combining arithmetic and assignment operators in JavaScript?
What is the result of combining arithmetic and assignment operators in JavaScript?
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What is the purpose of a switch statement in JavaScript?
What is the purpose of a switch statement in JavaScript?
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