Frontend Quiz 5 summer internship

Which keyword is used to declare a variable in JavaScript?

• A. int

• B. var

• C. float

• D. char

Which keyword is used to declare a constant variable in JavaScript?

• A. const

• B. let

• C. var

• D. final

Which datatype is not primitive in JavaScript?

• A. String

• B. Boolean

• C. Object

• D. Number

Which operator is used to assign a value to a variable?

• A. ==

• B. =

• C. ===

• D. !=

Which operator is used to concatenate two strings in JavaScript?

• A. +

• B. &

• C. &&

• D. ||

How do you call a function named myFunction in JavaScript?

• A. myFunction();

• B. call myFunction();

• C. call function myFunction();

• D. myFunction;

Which of the following is the correct syntax for a function expression in JavaScript?

• A. var myFunction = function() {};

• B. function myFunction = function() {};

• C. myFunction() => {};

• D. var myFunction() = function {};

What will be the output of console.log(1 + "1");?

• A. 2

• B. 11

• C. NaN

• D. SyntaxError

What will be the output of console.log(1 === "1");?

• A. true

• B. false

• C. undefined

• D. NaN

Which of the following is a valid JavaScript variable name?

• A. 2names

• B. first_name

• C. -lastname

• D. first name