Javascript

Which type of JavaScript language is

• Object-oriented

• Assembly-language

• High-level

• Object-based

Which of the following is the correct output for the following JavaScript code:

<script>

x = 10;

y = 5;

z = x / y;

document.getElementById("demo").innerHTML = "The value of z is: " + z;

</script>

• 2

• 0

• 5

• Error

In JavaScript, what is a block of statement?

• 1. Conditional block

• 1. block that contains a single statement

• 1. block that combines a number of statements into a single compound statement

• 1. both conditional block and a single statement

What will happen, if the following JavaScript code is executed?

<script>
alert(5 + 6);
</script>

• 1. An error is displayed

• 1. The values of count variable are logged or stored in a particular location or storage

• Pop up box appear with the value

• 1. An exception is thrown

The following is true about Javascript Objects, excepts

• Containers for data values

• Can be written with or without decimals

• can be assigned with multiple values

Which of the following is the syntax for declaring Javascript array?

• var pet = [ "cat", "dog", "bird"]

• var pet = [ cat, dog, bird]

• var pet = { cat, dog, bird}

• var pet = ( cat, dog, bird)

Which of the following is the getElementsByTagName() method ?

• return the element by given id value

• return the element by given class name

• return the element by given tag name

• return the element by given name value

What is JavaScript?

• JavaScript is a scripting language used to make the website interactive

• JavaScript is an assembly language used to make the website interactive

• JavaScript is a compiled language used to make the website interactive

• None of the mentioned

What is the output of the following JavaScript code snippet?

<p id="demo"> </p>

var txt1 = " Happy";

var txt2 = " Birthday";

document.getElementById("demo").innerHTML = txt2 + txt1;

• Happy

• Birthday

• Happy Birthday

• Birthday Happy

Arrays in JavaScript are defined by which of the following statements?

• It is an ordered list of objects

• It is an ordered list of values

• It is an ordered list of string

• It is an ordered list of functions