JavaScript Conditional Statements

JavaScript Conditional Statements - Important Points

26.		Which of the following is the correct syntax for a ternary operator in JavaScript?

A. x ? y : z;

B. x : y ? z;

C. x ? y, z;

D. x ? y || z;

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Answer: option a

Explanation:

The correct syntax for a ternary operator in JavaScript is condition ? value1 : value2.

27.		What is the purpose of the break statement in a switch statement?

A. To exit the switch statement

B. To execute the next case

C. To define a new case

D. To execute a default case

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Answer: option a

Explanation:

The break statement is used to exit the switch statement when a match is found for a particular case.

28.		What is the output of the following code? var x = 10; if (x < 5) { console.log("x is less than 5"); } else if (x < 10) { console.log("x is less than 10"); } else { console.log("x is greater than or equal to 10"); }

28.

What is the output of the following code?

var x = 10;
if (x < 5) {
console.log("x is less than 5");
} else if (x < 10) {
console.log("x is less than 10");
} else {
console.log("x is greater than or equal to 10");
}

A. x is less than 5

B. x is less than 10

C. x is greater than or equal to 10

D. No output

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Answer: option c

Explanation:

The condition x >= 10 is true, so the else block is executed, which outputs "x is greater than or equal to 10".

29.		Which of the following is a truthy value in JavaScript?

A. 0

B. null

C. 0

D. hello

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Answer: option d

Explanation:

A truthy value is a value that is considered true when evaluated in a Boolean context. In JavaScript, non-empty strings are truthy values.

30.		Which of the following is a falsy value in JavaScript?

A. 0

B. undefined

C. {}

D. 1

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Answer: option b

Explanation:

A falsy value is a value that is considered false when evaluated in a Boolean context. In JavaScript, undefined is a falsy value.

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