FST Class 2023- Quiz 2

What is the purpose of the `if` statement in JavaScript?

• To define a function

• To create a loop

• To make a decision based on a condition

• To declare a variable

What is the syntax for an `if` statement in JavaScript?

• if condition { code }

• if (condition) { code }

• (condition) if { code }

• if { code } (condition)

What is the purpose of the `else` statement in JavaScript?

• To define a function

• To create a loop

• To provide an alternative code block when the `if` condition is false

• To declare a variable

What is the purpose of a nested `if-else` statement?

• To create complex loops

• To handle multiple `if` conditions

• To improve code readability

• To create a decision tree with multiple levels of conditions

How do you write a nested `if-else` statement?

• if else { code } (condition)

• if (condition) else { code }

• if (condition) { code } else { code }

• if { code } else (condition) { code }

Which of the following is the correct way to check if a number is both even and positive using `if-else`?

• if (num % 2 === 0 && num > 0)

• if (num % 2 === 0 || num > 0)

• if (num % 2 === 0 && num >= 0)

• if (num % 2 === 0 || num >= 0)

How many conditions can be checked in a single `if-else` statement?

• Only one

• Two

• Multiple

• No limit

Which of the following is a correct example of nested `if-else` statement?

• if (condition) { if (condition) { code } }

• if { if { code } (condition) } (condition)

• if (condition) { if { code } }

• (condition) if { code } else { code }

What is the output of the following code?

var num = 12;

if (num > 10) {

if (num < 15) {

console.log("Between 10 and 15");

}

} else {

console.log("Not between 10 and 15");

}

• Between 10 and 15

• Not between 10 and 15

• Both Between 10 and 15 and Not between 10 and 15

• No output

What is the output of the following code?

var num = -5;

if (num) {

console.log("Truthy");

} else {

console.log("Falsy");

}

• Truthy

• Falsy

• Both Truthy and Falsy

• No output