Javascript Online Test

function printArray(a) 
{
     var len = a.length, i = 0;
     if (len == 0)
        console.log("Empty Array");
     else 
     {
         do 
         {
             console.log(a[i]);
         } while (++i < len);
     }
}
printArray([
    1, 2, 3, 4, 5
]);

1. Prints the numbers in the array in order

2. Prints the numbers in the array in the reverse order

3. Prints 0 to the length of the array

4. Prints "Empty Array"

Correct Answer : A

1. JSON.stringify()

2. JSON.toString()

3. JSON.serialize()

4. JSON.text()

Correct Answer : A

1. Load time errors

2. Run time errors:

3. Logical Errors:

4. All of the above

Correct Answer : B

1. Get the object

2. Dereference the current scope chain

3. Reference the current scope chain

4. Return the value

Correct Answer : C

1. Functions are declared in the scope

2. Functions are executed using scope chain

3. Functions are declared outside the scope

4. Variables are declared within the function

Correct Answer : B

1. AvailHeight

2. ColorsDepth

3. AvailWidth

4. ColorDepth

Correct Answer : B

1. Make computations in HTML simpler

2. Minimize storage requirements on the web server

3. Increase the download time for the client

4. None of the mentioned

Correct Answer : B

1. pop()

2. reduce()

3. push()

4. reduceRight()

Correct Answer : D

1. changeOrder(order)

2. reverse()

3. sort(order)

4. None of the above.

Correct Answer : B

1. Infiniti

2. Null

3. Undefined

4. NaN

Correct Answer : B

1. It uses bitwise checking

2. It uses === and !== instead

3. It uses equals() and notequals() instead

4. It uses equalto()

Correct Answer : B

1. Reverse

2. Shift

3. Slice

4. Splice

Correct Answer : D

var book = {
“main title”: “JavaScript”,
‘sub-title’: “The Definitive Guide”,
“for”: “all audiences”,
author: {
firstname: “David”,
surname: “Flanagan”
}
};

1. properties

2. property values

3. property names

4. objects

Correct Answer : C

1. fixed()

2. fontcolor()

3. fontsize()

4. bold()

Correct Answer : C

1. It controls spacing in the resulting JSON string

2. All three statements are false

3. It removes whitespace

4. It is an optional parameter

Correct Answer : C

1. document.getElement ("demo").innerHTML = "I am a developer";

2. document.getElementById ("demo").innerHTML = "I am a developer";

3. document.getId ("demo") = "I am a developer";

4. document.getElementById ("demo").innerHTML = I am a developer;

Correct Answer : B

1. toString()

2. toFixed()

3. toLocaleString()

4. toPrecision()

Correct Answer : A

1. Value

2. Object

3. There are none

4. Key

Correct Answer : C

1. { "meals" : { "breakfast" , "lunch" , "dinner" } }

2. { "meals" : [ "breakfast" , "lunch" , "dinner" ] }

3. [ "meals" : { "breakfast" , "lunch" , "dinner" } ]

4. [ {"meals" : { "breakfast" , "lunch" , "dinner" } } ]

Correct Answer : B

1. Load Scripts programmatically

2. Load JavaScript files manually

3. Load JavaScript files programmatically

4. All of the mentioned

Correct Answer : C

1. A space

2. A semicolon

3. A comma

4. A colon

Correct Answer : D

1. String

2. Object

3. Serialized Object

4. All of the mentioned

Correct Answer : B

1. Primitive

2. Reference types

3. All of the above

4. None of the above

Correct Answer : C

1. .jn

2. .js

3. .jsn

4. .json

Correct Answer : D

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

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. Variable used in the code doesn't exist

2. Variable is not assigned to any value

3. Property doesn't exist

4. All of the above

Correct Answer : D

1. JavaScript is a stripped-down version of Java

2. JavaScript's syntax is loosely based on Java's

3. They both originated on the island of Java

4. None of the above

Correct Answer : B

1. JSON.parse('({"FirstName": "John", "LastName":"Doe"})');

2. JSON.parse("{'FirstName': 'John', 'LastName':'Doe'}");

3. JSON.parse("({'FirstName': 'John', 'LastName':'Doe'})");

4. JSON.parse('{"FirstName": "John", "LastName":"Doe"}');

Correct Answer : D

1. High level programming language

2. Assembly level programming language

3. Machine level programming language

4. Low level programming language

Correct Answer : A