4th Quarter Modules

Question 1

Is a light-weight object-oriented programming language which is
used by several websites for scripting the webpages.

Answer 1

JavaScript (js)

Question 2

It is an interpreted, full-fledged
programming language that enables dynamic interactivity on websites when applied to
an HTML document.

Answer 2

JavaScript (js)

Question 3

It was introduced in the year 1995 for adding programs to the
webpages in the Netscape Navigator browser.

Answer 3

JavaScript (js)

Question 4

With __________, users can build modern web
applications to interact directly without reloading the page every time.

Answer 4

JavaScript

Question 5

The name
was suggested and provided in the times when ____ was gaining popularity in the
market.

Answer 5

Java

Question 6

Although, JavaScript has no ____________ with Java programming language.

Answer 6

connectivity

Question 7

All popular web browsers support __________ as they provide built-in execution
environments.

Answer 7

JavaScript

Question 8

__________ follows the syntax and structure of the C programming language.
Thus, it is a structured programming language.

Answer 8

JavaScript

Question 9

is a weakly typed language, where certain types are implicitly cast
(depending on the operation).

Answer 9

JavaScript

Question 10

is an object-oriented programming language that uses prototypes
rather than using classes for inheritance.

Answer 10

JavaScript

Question 11

• It is a light-weighted and interpreted language.
• It is a case-sensitive language.

Answer 11

features of JavaScript

Question 12

• is supportable in several operating systems including, Windows,
  macOS, etc.
• It provides good control to the users over the web browsers.

Answer 12

features of JavaScript

Question 13

He realized that the web needed to
become more dynamic.

Answer 13

Marc Andreessen

Question 13

In 19__, Mosaic, the first popular web browser, came into existence.

Answer 13

1993

Question 13

In the year
19__, Netscape was founded by Marc Andreessen.

Answer 13

1994

Question 14

Who founded Netscape?

Answer 14

Marc Andreessen

Question 15

Thus, a ‘____ language’ was believed to be provided to HTML to
make web designing easy for designers and part-time programmers.

Answer 15

glue language

Question 16

Consequently, in
19__, the company recruited _______ ____ intending to implement and embed Scheme
programming language to the browser.

Answer 16

1995 & Brendan Eich

Question 17

But, before Brendan could start, the company
merged with ___ ____________ for adding Java into its Navigator so that it could
compete with Microsoft over the web technologies and platforms.

Answer 17

Sun Microsystems

Question 18

Further, _________ decided to give a similar
name to the scripting language as Java’s.

Answer 18

Netscape

Question 19

Finally, in May 1995, ____ __________ coined the first code of Javascript named ‘Mocha’.

Answer 19

Marc Andreessen

Question 20

The marketing team replaced the name with ‘LiveScript’. But, due to
trademark reasons and certain other reasons, in December 1995, the language was
finally renamed to ‘___________’. From then, ___________ came into existence.

Answer 20

JavaScript

Question 21

1. Client-side validation,
2. Dynamic drop-down menus,
3. Displaying date and time,
4. Displaying pop-up windows and dialog boxes (like an alert dialog box, confirm
   dialog box and prompt dialog box),
5. Displaying clocks etc.

Answer 21

Application of JavaScript

Question 22

3 JavaScript Index

Answer 22

• JavaScript Introduction
• JavaScript Example
• External JavaScript

Question 23

9 JavaScript Basics

Answer 23

- JavaScript Comment - JavaScript Variable - JavaScript Global Variable - JavaScript Data Types - JavaScript Operators - JavaScript If Statement - JavaScript Switch - JavaScript Loop - JavaScript Function

Question 24

3 Places to put JavaScript code

Answer 24

* Between the body tag of html * Between the head tag of html * In .js file (external javaScript)

Question 25

JavaScript Example :

Answer 25

code between the body tag

Question 26

JavaScript Example : In this example, we are creating a function msg(). To create function in JavaScript, you need to write function with function_name as given below.

Answer 26

code between the head tag

Question 27

Welcome to JavaScript

Answer 27

onclick event to call msg() function

Question 28

An external JavaScript file must be saved by ___ extension.

Answer 28

.js

Question 29

We can create external JavaScript file and ______ it in many html page.

Answer 29

embed

Question 30

It provides code re usability because single JavaScript file can be used in several html pages.

Answer 30

External JavaScript file

Question 31

It helps in the reusability of code in more than one HTML file.

Answer 31

Advantages of External JavaScript

Question 32

It allows easy code readability.

Answer 32

Advantages of External JavaScript

Question 33

It is time-efficient as web browsers cache the external js files, which further reduces the page loading time.

Answer 33

Advantages of External JavaScript

Question 34

It enables both web designers and coders to work with html and js files parallelly and separately, i.e., without facing any code conflictions.

Answer 34

Advantages of External JavaScript

Question 35

The length of the code reduces as only we need to specify the location of the js file.

Answer 35

Advantages of External JavaScript

Question 36

If two js files are dependent on one another, then a failure in one file may affect the execution of the other dependent file.

Answer 36

Disadvantages of External JavaScript

Question 36

The stealer may download the coder's code using the url of the js file.

Answer 36

Disadvantages of External JavaScript

Question 36

The web browser needs to make an additional http request to get the js code.

Answer 36

Disadvantages of External JavaScript

Question 36

A tiny to a large change in the js code may cause unexpected results in all its dependent files.

Answer 36

Disadvantages of External JavaScript

Question 36

We need to check each file that depends on the commonly created external javascript file.

Answer 36

Disadvantages of External JavaScript

Question 37

If it is a few lines of code, then better to implement the internal javascript code.

Answer 37

Disadvantages of External JavaScript

Question 37

Is ignored by the JavaScript engine i.e. embedded in the browser.

Answer 37

JavaScript comment

Question 37

1. To make code easy to understand It can be used to elaborate the code so that end user can easily understand the code. 2. To avoid the unnecessary code It can also be used to avoid the code being executed. Sometimes, we add the code to perform some action. But after sometime, there may be need to disable the code. In such case, it is better to use ________.

Answer 37

Advantages of JavaScript comments

Question 37

1. Single-line and Multi-line comments 2. The JavaScript comments are meaningful way to deliver message. It is used to add information about the code, warnings or suggestions so that end user can easily interpret the code.

Answer 37

JavaScript Comment Advantage of javaScript comments

Question 38

two types of comments in JavaScript.

Answer 38

* Single-line Comment * Multi-line Comment

Question 38

JavaScript variables are case __________, for example x and X are different variables.

Answer 38

sensitive

Question 38

It is represented by double forward slashes (//). It can be used before and after the statement.

Answer 38

JavaScript Single line Comment

Question 38

Is simply a name of storage location.

Answer 38

JavaScript variable

Question 38

two types of variables in JavaScript

Answer 38

local variable and global variable

Question 39

(a to z or A to Z), underscore( _ ), or dollar( $ ) sign. After first letter we can use digits (0 to 9), for example value1.

Answer 39

rules while declaring a JavaScript variable (also known as identifiers).

Question 40

Is declared inside block or function. It is accessible within the function or block only. For example: Or,

Answer 40

JavaScript local variable

Question 41

Is accessible from any function. A variable i.e. declared outside the function or declared with window object is known as global variable. For example:

Answer 41

JavaScript global variable

Question 42

Provides different data types to hold different types of values.

Answer 42

JavaScript

Question 43

Is a dynamic type language, means you don't need to specify type of the variable because it is dynamically used by __________ engine.

Answer 43

JavaScript

Question 44

types of data types in JavaScript.

Answer 44

* Primitive data type * Non-primitive (reference) data type

Question 45

Data Type: represents sequence of characters e.g. "hello"

Answer 45

String

Question 46

Data Type: represents numeric values e.g. 100

Answer 46

Number

Question 47

Data Type: represents boolean value either false or true

Answer 47

Boolean

Question 48

Data Type: represents undefined value

Answer 48

Undefined

Question 49

Data Type: represents null i.e. no value at all

Answer 49

Null

Question 50

Data Type: represents instance through which we can access members

Answer 50

Object

Question 51

Data Type: represents group of similar values

Answer 51

Array

Question 52

Data Type: represents regular expression

Answer 52

RegExp

Question 53

Are symbols that are used to perform operations on operands.

Answer 53

JavaScript operators

Question 54

Are used to perform arithmetic operations on the operands.

Answer 54

JavaScript Arithmetic Operators

Question 54

Operators in Javascript

Answer 54

1. Arithmetic Operators 2. Comparison (Relational) Operators 3. Bitwise Operators 4. Logical Operators 5. Assignment Operators 6. Special Operators

Question 55

compares the two operands.

Answer 55

JavaScript Comparison Operators

Question 56

perform bitwise operations on operands.

Answer 56

JavaScript Bitwise Operators