Exploring JavaScript Built-in Objects

What is the purpose of the Math object in JavaScript?

• To handle asynchronous operations

• To store user data in JavaScript

• The purpose of the Math object in JavaScript is to provide mathematical functions and constants.

• To create HTML elements dynamically

How do you call a method from a built-in object?

• Access the method via 'object->methodName()'.

• Use the syntax 'object.methodName()'.

• Invoke the method with 'object:methodName()'.

• Call the method using 'methodName.object()'.

What does the Math.random() method return?

• A boolean indicating true or false.

• A whole number between 1 and 10.

• A floating-point number between 0 and 1.

• A string representing a random value.

What is the range of numbers returned by Math.random()?

• 0 < Math.random() <= 1

• 0 <= Math.random() <= 1

• -1 < Math.random() < 2

• 0 <= Math.random() < 1

How can you generate a random number between 0 and 50 using Math.random()?

• Math.random() * 100

• Math.round(Math.random() * 50)

• Math.floor(Math.random() * 51)

• Math.ceil(Math.random() * 50)

What operator is used to access methods of an object in JavaScript?

• ->

• []

• ::

• .

What will Math.random() * 50 likely return?

• A number between 0 and 50 (exclusive)

• A string representation of a number

• A number greater than or equal to 50

• A negative number

How can you ensure a random number is a whole number?

• Use a random integer generator or round a random floating-point number.

• Generate a random number and multiply it by 2.5.

• Use a random decimal generator.

• Select a random number from a fixed set of fractions.

What is the result of Math.random() * 50 if you want a whole number?

• Math.random() * 50 | 0

• Math.ceil(Math.random() * 50)

• Math.round(Math.random() * 50)

• Math.floor(Math.random() * 50)

What is the significance of the parentheses when calling a method?

• Parentheses are used to define a variable.

• Parentheses indicate the method is optional.

• Parentheses are only needed for methods without parameters.

• The parentheses signify the execution of the method and allow for passing arguments.