unit 2 javascript

What is the value returned by the following expression? // (0 > 1) ? x : y

Y

Which of the following statements declares a variable whose value can't be altered throughout the script?

const x = 5;

What is the data type of the value of myVar after execution? // var myVar; myVar = confirm("continue?");

Boolean

What is the return type of the confirm() method?

Boolean (either true or false)

Which of the following statements is true of JavaScript keywords and/or reserved words?

You cannot use reserved words as names for objects.

Which of the following methods let you convey information to a user and doesn't record the user's response?

alert( )

What is the value of testValue after execution?

Teenager

What is the difference between myVar1 and myVar2? // var myVar1 = "25"; var myVar2 = 25;

The data type

Which JavaScript operator indicates concatenation?

+

Which among the following operators is of highest precedence?

++

Which of the following operators is an assignment operator?

+=

What is the output of this statement? // document.write(8 / 4 * 2 + 2 / 2);

5

Which of the following data types is a non-primitive data type?

Array

What will be the result of this code snippet when run in the browser? // Consider the following JavaScript code snippet:

012

Which of the following statements is true of the undefined data type?

It is the value taken by the variables that don't have any value assigned to them.