JavaScript Quiz III

Which of the following is an operand in

4 + 5 ?

• 4

• 5

• +

• Both 4 and 5

What is the output of: console.log(4 + "5");

• 9

• 45

• NaN

• Error

Why does 10 - "3" work but

"10a" - 3 gives NaN?

• JavaScript converts all strings to numbers automatically

• "3" is numeric, but "10a" is not

• Both should give a number

• "10a" is treated as 0

What’s the difference between == and ===?

• Both check value and type

• `==` checks only type

• `==` checks value with type coercion; `===` checks value and type

• `===` checks only value

Which operator would you use to check if a number is even?

• %

• **

• /

• ++

If x = 10, what does

x += 5;

x *= 2;

result in?

• 30

• 25

• 20

• 50

What will this print? let x = 2; console.log(x++ + ++x);

• 4

• 5

• 6

• 7

Which of these is NOT a valid way to declare a string?

• 'Hello'

• "Hello"

• `Hello`

• (Hello)

What escape sequence is used for newline?

• \t

• \n

• \\

• \"

What is the main advantage of template literals?

• They require fewer variables

• They don’t need quotes at all

• They allow multiline strings and interpolation

• They convert numbers to strings