Quiz Javascript

1. Which of the following is NOT a primitive data type in JavaScript?

• a) String

• b) Number

• c) Object

• d) Boolean

2. What will be the output of type of null?

• a) "null"

• b) "undefined"

• c) "object"

• d) "number"

3. Which method converts a string to lowercase in JavaScript?

• // a) toLowerCase()

• // b) lowerCase()

• // c) changeLower()

• // d) convertLower()

4. What is the result of parseInt("15.99")?

• // a) 15

• // b) 15.99

• // c) "15.99"

• // d) 16

5. Which operator is used to check both value and type in JavaScript?

• // a) ==

• // b) !=

• // c) ===

• // d) =

6. What will Boolean(0) return?

• // a) 0

• // b) false

• // c) "false"

• // d) true

// 7. What will be the output of this code?

let x = "5";

if (x == 5) console.log("Yes");
else console.log("No");

• yes

• No

8. Which method is used to remove whitespace from both sides of a string?

• // a) trim()

• // b) slice()

• // c) cut()

• // d) replace()

9. What will be the output of "10" + 5?

• // a) 15

• // b) "105"

• // c) NaN

• // d) Error

10. Which statement will execute if the condition is false?

• // a) if

• // b) else

• // c) else if

• // d) switch