JavaScript Data Types Quiz
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Questions and Answers

What are the basic data types in JavaScript?

  • Number, String, Boolean, Null, Undefined, Object (correct)
  • Number, String, Boolean, Undefined, Object, Array
  • Integer, Float, Character, Boolean, Object, Array
  • Integer, String, Boolean, Null, Undefined, Object

    • Which data type is used for a single character in JavaScript?

  • Single
  • Character
  • String (correct)
  • Char

    • What is the difference between null and undefined in JavaScript?

  • Null is a data type, while Undefined is a keyword.
  • Null represents a variable that has not been declared, while Undefined represents 'no value'.
  • Null is an assigned value representing 'no value', while Undefined means a variable has been declared but has not yet been assigned a value. (correct)
  • Null represents 'no value', while Undefined represents a variable that has been declared but not assigned a value.

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