G10-MABINI

what is the purpose of the `var` keywoard

• it declares a new variable

• It assigns a value to variable

• it creates a function

What is the result of the following code?

"console.log(typeof null);"

• "null"

• "object"

• "undefined"

• "string"

Which of the following not a valid JavaScript data type?

• boolean

• object

• number

• string

• character

What is the output of the following code?

"let x = "10";

let y = "5";

console.log(x+y);

• 15

• "105"

• "10+5"

• Error

What is the following output of the following code?

"let a = 10;

let b = 5;

console.log(a * b + a / b);

• 52

• 107

• 57

• 102

Which symbolis used to start a single-line comments in JavaScript?

• /

• ;

• #

• //

What is the purpose of comments in JavaScript?

• To improve the performance of code

• To make the code more understandable

• To create dynamic effects in the code

• To prevent errors from occuring the code

What is he purpose of using comments in the code?

• To explain the functionality of the code

• To modify code

• to debug code

• To create animation in the code

Which of the following is the correct syntax to declare a variable in JavaScript?

• let myVariable = 10;

• myVariable = 10;

• var myVariable = 10;

• int myVariable = 10;

Which of the following is not a valid JavaScript variable name?

• _myVriable

• myVariable

• $myVariable

• 1myVariable