--description--

To pass the quiz, you must correctly answer at least 18 of the 20 questions below.

--quizzes--

--quiz--

--question--

--text--

What does NaN stand for?

--distractors--

Numeric and Number

Not a Null

Null and Number

--answer--

Not a Number

--question--

--text--

Which of the following is NOT an arithmetic operator in JavaScript?

--distractors--

*

+

-

--answer--

??

--question--

--text--

What happens if you try to divide by zero in JavaScript?

--distractors--

JavaScript will output 0.

Nothing will happen.

JavaScript will throw an error.

--answer--

JavaScript will output Infinity

--question--

--text--

Which of the following is the correct use of the exponentiation operator?

--distractors--

2*3

2#3

2%3

--answer--

2**3

--question--

--text--

Which operator should you use when decrementing a variable in JavaScript?

--distractors--

++

//

**

--answer--

--

--question--

--text--

Which of the following is NOT a bitwise operator?

--distractors--

&

|

^

--answer--

>

--question--

--text--

Which of the following is the correct compound operator for getting the remainder?

--distractors--

//=

\=

%%=

--answer--

%=

--question--

--text--

What is the difference between the == and === operators?

--distractors--

There is no difference. The comparison result will always have the same result.

The == operator is used to check if the data type is the same while the === is used to check if the value is equal.

The == operator can only be used with primitive types while the === operator is only used for objects.

--answer--

The == operator only compares values whereas the === operator compares values and types.

--question--

--text--

What is the unary plus operator (+) used for?

--distractors--

It is used to decrement a value by one.

It is used to get the remainder from an operation.

It is used to invert the binary representation of a number.

--answer--

It is used to convert its operand into a number.

--question--

--text--

Which of the following Math methods rounds a value to the nearest whole integer?

--distractors--

Math.trunc()

Math.max()

Math.min()

--answer--

Math.round()

--question--

--text--

What does the Math.sqrt() method do?

--distractors--

This method returns a random floating point number.

This method returns the absolute value for a number.

This method returns the cube of a number.

--answer--

This method returns the square root of a number.

--question--

--text--

Which of the following is NOT a valid method for the Math object?

--distractors--

Math.ceil()

Math.pow()

Math.abs()

--answer--

Math.extend()

--question--

--text--

Which of the following will return false?

--distractors--

isNaN("Matt")

isNaN()

isNaN(undefined)

--answer--

isNaN(7)

--question--

--text--

What does the parseFloat() method do?

--distractors--

It parses a string argument and performs a bitwise operation on it.

It parses a string argument and returns false.

It parses a string argument and returns an integer.

--answer--

It parses a string argument and returns a floating-point number.

--question--

--text--

What will be logged to the console?

let num = 5;
console.log(++num);

--distractors--

error

null

5

--answer--

6

--question--

--text--

What would be the output for the following code?

console.log(5 == '5');

--distractors--

undefined

false

null

--answer--

true

--question--

--text--

What is operator precedence?

--distractors--

Operator precedence is used to check if the value on the left is less than the one on the right.

Operator precedence is used to raise a variable to the power of the specified number and reassigns the result to the variable.

Operator precedence is used to increase the value by one.

--answer--

Operator precedence determines the order in which operations are evaluated in an expression.

--question--

--text--

Which of the following is NOT a comparison operator?

--distractors--

>

>=

<

--answer--

!>

--question--

--text--

What does the unary negation operator (-) do?

--distractors--

It flips the boolean value of its operand.

It decreases the value by one.

It increases the value by one.

--answer--

It negates the operand.

--question--

--text--

Which of the following is an example of using the nullish coalescing operator?

--distractors--

const userSettings = {
 theme: null,
 volume: 0,
 notifications: false,
};

userSettings.theme () 'light';

const userSettings = {
 theme: null,
 volume: 0,
 notifications: false,
};

userSettings.theme ** 'light';

const userSettings = {
 theme: null,
 volume: 0,
 notifications: false,
};

userSettings.theme \\ 'light';

--answer--

const userSettings = {
 theme: null,
 volume: 0,
 notifications: false,
};

userSettings.theme ?? 'light';