Array And Function MCQ question and answer in javascript with solution

1.

Consider the code snippet given below

var count = [1,,3];

What is the observation made?

A. The omitted value takes “undefined”

B. This results in an error

C. This results in an exception

D. None of the mentioned

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2.

Consider the following code snippet

var a1 = [,,,]; 
var a2 = new Array(3); 
0 in a1 
0 in a2

The result would be

A. true false

B. false true

C. true true

D. false true

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3.
The pop() method of the array does which of the following task ?

A. decrements the total length by 1

B. increments the total length by 1

C. prints the first element but no effect on the length

D. None of the mentioned

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4.

Consider the following code snippet :

if (!a[i]) continue ;

What is the observation made ?

A. Skips the undefined elements

B. Skips the non existent elements

C. Skips the null elements

D. All of the mentioned

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5.
What will happen if reverse() and join() methods are used simultaneously ?

A. Reverses and stores in the same array

B. Reverses and concatenates the elements of the array

C. Reverses

D. All of the mentioned

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1.
Consider the code snippet given below
`var count = [1,,3];`
What is the observation made?

Answer & Solution

2.
Consider the following code snippet
`var a1 = [,,,]; var a2 = new Array(3); 0 in a1 0 in a2`
The result would be

Answer & Solution

3.
The pop() method of the array does which of the following task ?

Answer & Solution

4.
Consider the following code snippet :
`if (!a[i]) continue ;`
What is the observation made ?

Answer & Solution

5.
What will happen if reverse() and join() methods are used simultaneously ?

Answer & Solution

Array And Function MCQ question and answer in javascript with solution

1. Consider the code snippet given below var count = [1,,3]; What is the observation made?

Answer & Solution

2. Consider the following code snippet var a1 = [,,,]; var a2 = new Array(3); 0 in a1 0 in a2 The result would be

Answer & Solution

3. The pop() method of the array does which of the following task ?

Answer & Solution

4. Consider the following code snippet : if (!a[i]) continue ; What is the observation made ?

Answer & Solution

5. What will happen if reverse() and join() methods are used simultaneously ?

Answer & Solution

1.
Consider the code snippet given below
`var count = [1,,3];`
What is the observation made?

2.
Consider the following code snippet
`var a1 = [,,,]; var a2 = new Array(3); 0 in a1 0 in a2`
The result would be

3.
The pop() method of the array does which of the following task ?

4.
Consider the following code snippet :
`if (!a[i]) continue ;`
What is the observation made ?

5.
What will happen if reverse() and join() methods are used simultaneously ?