Javascript Online Test

1. False, JSON is language independent.

2. False, JavaScript must be available although it is not necessary to use.

3. True, though all browsers have JavaScript enabled.

4. True, though JavaScript is readily available in today's browsers.

Correct Answer : A

1. [objectName.]eval(numeric)

2. [objectName.]eval(string)

3. [EvalName.]eval(string)

4. [EvalName.]eval(numeric)

Correct Answer : B

1. Floating numbers

2. Representation of functions that returns a value

3. \f is not present in JavaScript

4. Form feed

Correct Answer : D

1. Objects

2. Variables

3. Functions

4. Graphics

Correct Answer : D

1. A space

2. A semicolon

3. A comma

4. A colon

Correct Answer : D

1. clearInvocation()

2. cancelInvocation()

3. clearInterval()

4. clear()

Correct Answer : C

1. Not a valid JSON string

2. Array

3. Class

4. Object

Correct Answer : B

1. Throws Error

2. It returns the decimal values in string form

3. If returns only the integer portion of the number

4. None of the above

Correct Answer : C

var a = 10;
var b = 0;
document.write(a/b);

1. Nothing is printed

2. 0 is printed

3. Infinity is printed

4. Some Garbage Value

Correct Answer : C

1. True

2. False

Correct Answer : A

1. Object

2. Array

3. Class

4. Not a valid JSON string

Correct Answer : A

1. High level programming language

2. Assembly level programming language

3. Machine level programming language

4. Low level programming language

Correct Answer : A

1. Syntax error

2. Missing of semicolons

3. Division by zero

4. All of the mentioned

Correct Answer : C

1. <script src="demo.js">

2. <script source="demo.js">

3. <script ref="demo.js">

4. <script type="demo.js">

Correct Answer : A

1. Before each iteration, the interpreter evaluates the variable expression and assigns the name of the property

2. The iterations can be infinite when an interpreter is used

3. The body of the loop is executed only once

4. the iteration is finite when an interpreter is used

Correct Answer : A

1. Primitive

2. Reference types

3. All of the above

4. None of the above

Correct Answer : C

1. Single Quote

2. Double Quote

3. Single Quote or Double Quote

Correct Answer : B

1. To store information remotely.

2. To send and receive bits of data.

3. To store information locally.

Correct Answer : B

1. Class, parameters, object’s extensible flag

2. Prototype, class, objects’ parameters

3. Prototype, class, object’s extensible flag

4. Native object, Classes and Interfaces and Object’s extensible flag

Correct Answer : C

1. A lightweight data-encoding framework. Java Omnipresent Notation.

2. A lightweight data-interchange format. JavaScript Object Notation.

3. A lightweight data-interchange format. Java Objective Notion.

4. A lightweight database framework. JavaScript Object Notation.

Correct Answer : B

1. JSONTokener

2. JSONParser

3. JParser

4. ParserJ

Correct Answer : A

1. changeOrder(order)

2. reverse()

3. sort(order)

4. None of the above.

Correct Answer : B

1. AvailHeight

2. ColorsDepth

3. AvailWidth

4. ColorDepth

Correct Answer : B

1. String

2. Object

3. Serialized Object

4. All of the mentioned

Correct Answer : B

1. toString()

2. toFixed()

3. toLocaleString()

4. toPrecision()

Correct Answer : A

1. It is used to quickly create JSON text.

2. It quickly converts JSON to Java strings.

3. It is used to create number strings in JSON.

4. It is used to create JSON ordered pairs.

Correct Answer : A

1. Undefined

2. Number

3. Boolean

4. Float

Correct Answer : D

1. Value

2. Object

3. There are none

4. Key

Correct Answer : C

1. Object

2. Date

3. Array

4. String

Correct Answer : B

1. Faster transfer times over the internet

2. Parsing JSON is noticeably faster than parsing XML

3. Web apps have a smaller footprint

Correct Answer : A