Q
What does the following JavaScript code snippet do? Code: let num = 5; while (num > 0) { console.log(num); num--; }

Answer & Solution

Answer: Option B
Solution:
The code snippet uses a while loop to execute a block of code repeatedly until the condition num > 0 becomes false. It starts with num being 5 and prints the value of num to the console in each iteration, then decrements num by 1. This process continues until num becomes 0, at which point the loop stops. Therefore, the output will be: 5 4 3 2 1
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Which of the following JavaScript statements is used to execute a block of code repeatedly while a condition remains true?

A). Function invocation statement

B). Conditional statement (if statement)

C). Assignment statement

D). Looping statement (while loop)

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A). Exits the current loop or switch statement

B). Skips the current iteration in a loop

C). Assigns a value to a variable

D). Continues to the next iteration in a loop

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A). x is greater than 10

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C). Undefined

D). Error

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A). 1 2 3

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C). 2 3 4

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What will be the output of the following JavaScript code? Code: let i = 0; for (; i < 3; i++) { console.log(i); }

A). 0 1 2 3

B). 0 1 2

C). 1 2 3

D). 1 2 3 4

What is the purpose of the following JavaScript statement? return result;

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B). Skips the current iteration in a loop

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What will be the output of the following JavaScript code? Code: for (let i = 0; i <= 3; i++) { console.log(i); }

A). 0 1 2 3

B). 0 1 2

C). 1 2 3

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Which of the following JavaScript statements is used to execute a block of code repeatedly until a specified condition becomes false?

A). Function declaration statement

B). Conditional statement (if statement)

C). Assignment statement

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What does the following JavaScript code snippet do? Code: let numbers = [1, 2, 3, 4, 5]; let sum = 0; for (let num of numbers) { sum += num; } console.log(sum);

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C). Sums all numbers in the array numbers

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A). 0 1 2 3

B). 0 1 2

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D). Infinite loop