Gold Batch Quiz -4

What is JavaScript primarily used for?

• a) Back-end development

• b) Database management

• c) Client-side scripting

• d) System programming

How do you declare a JavaScript variable?

• a) var myVar;

• b) let myVar;

• c) const myVar;

• d) All of the above

Which of the following is a JavaScript data type?

• a) Number

• b) String

• c) Boolean

• d) All of the above

Which function is used to parse a string to an integer?

• a) parseInt()

• b) toInt()

• c) Number()

• d) int()

What will type of null return?

• a) object

• b) null

• c) undefined

• d) boolean

How do you create an array in JavaScript?

• a) let arr = [];

• b) let arr = new Array();

• c) Both a and b

• d) None of the above

What does === compare in JavaScript?

• a) Value only

• b) Data type only

• c) Value and data type

• d) None of the above

What does the map() function do in JavaScript?

• a) Iterates through an array and returns a new array

• b) Filters array elements

• c) Changes the array to a map

• d) Sorts an array

Which of the following is a looping structure in JavaScript?

• a) for

• b) while

• c) do-while

• d) All of the above

What will console.log("Hello" + 2 + 2); output?

• a) Hello4

• b) Hello22

• c) Error

• d) 4Hello