JavaScript Basic Programs for Beginners

JavaScript Basic Programs for Beginners - Important Points

6.		What is the output of the following program? console.log(10 % 3);

What is the output of the following program?

console.log(10 % 3);

A. 1

B. 3.33

C. 3

D. 0.3

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Answer: option a

Explanation:

The output of the code is "1" because 10 divided by 3 leaves a remainder of 1.

7.		Which of the following is the correct way to write an if statement in JavaScript?

A. if (condition) { // code }

B. if (condition) then { // code }

C. if (condition) -> { // code }

D. if (condition) = { // code }

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Answer: option a

Explanation:

The correct way to write an if statement in JavaScript is by using the syntax "if (condition) { // code }".

8.		What is the output of the following program? console.log("hello".toUpperCase());

What is the output of the following program?

console.log("hello".toUpperCase());

A. HELLO

B. hello

C. hElLo

D. null

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Answer: option a

Explanation:

The output of the code is "HELLO" because the toUpperCase() method converts the string to all uppercase letters.

9.		Which of the following is NOT a valid JavaScript data type?

A. number

B. string

C. array

D. tuple

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Answer: option d

Explanation:

Tuples are not a valid data type in JavaScript.

10.		What is the output of the following code snippet? console.log(Math.floor(4.7));

10.

What is the output of the following code snippet?

console.log(Math.floor(4.7));

A. 4.7

B. 5

C. 4

D. 0.7

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Answer: option c

Explanation:

The output of the code is "4" because Math.floor() returns the largest integer less than or equal to a given number.

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