JavaScript Questions

March 14, 2023

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Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/u797631661/domains/codermantra.com/public_html/wp-includes/formatting.php on line 449

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509

JavaScript Questions

1 / 15

1. Which of the following is the language of javascript?

A. text/javascript

B. text/ECMAscript

C. text/Vbscript

D. javaScript VBscript

2 / 15

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

A. It is an ordered list of values

B. It is an ordered list of objects

C. It is an ordered list of string

D. It is an ordered list of functions

3 / 15

3. JavaScript code can be written in ____.

A. JavaScript file (.js file)

B. HTML document directly

C. JavaScript file and in HTML document directly

D. In style sheets (.css file)

4 / 15

4. What will be the output of the following code snippet?


var a = "Scaler";
var result = a.substring(2, 4);
document.write(result);

A. al

B. ale

C. cal

D. caler

5 / 15

5. What will be the output of the following code snippet?

var a = "hello";
var sum = 0;
for(var i = 0; i < a.length; i++) {
   sum += (a[i] - 'a');
}
print(sum);

A. 47

B. NaN

C. zero

D. None of the above

6 / 15

6. What is the use of the noscript tag in Javascript?

A. The contents are displayed by non-JS-based browser

B. clears all cookies ans cache

C. both A and B

D. None of the above

7 / 15

7. What will be the output of the following JavaScript code?

// Javascript code to compare the height
function height()
{ 
    var  height = 123.56;
    var type = (height>=190) ? "tall" : "short";
    return type;
}

A. short

B. 123.56

C. tall

D. 190

8 / 15

8. Which is the function that calls another function after a time interval?

A. setTimeout()

B. setTime()

C. callafter()

D. timeSet()

9 / 15

9. What will be the output of the following code snippet?

function solve(arr, rotations){
 if(rotations == 0) return arr;
 for(let i = 0; i < rotations; i++){
   let element = arr.pop();
   arr.unshift(element);
 }
 return arr;
}
// solve([44, 1, 22, 111], 5);

A. [111, 44, 1, 22]

B. [44, 1, 22, 111]

C. [111, 22, 1, 44]

D. [1, 22, 111, 44]

10 / 15

10. What will be the function of the following JavaScript program?

var scope = "js scope";
function checkscope() 
{
    var scope = "javascript scope"; 
    function f() 
    { 
         return scope; 
    }
    return f;
}

A. Returns the value in scope

B. Returns value null

C. Shows an error message

D. Returns exception

11 / 15

11. The process in which an object or data structure is translated into a format suitable for transferral over a network, or storage is called?

A. Object Serialization

B. Object Encapsulation

C. Object Inheritance

D. None of the above

12 / 15

12. Which object serves as the global object at the top of the scope chain?

A. Hash

B. Property

C. Element

D. Window

13 / 15

13. What does the ‘toLocateString()’ method do in JS?

A. Returns a localised object representation

B. Returns a localised string representation of an object

C. Returns parsed string

D. None of the above

14 / 15

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

A. It is an ordered list of values

B. It is an ordered list of objects

C. It is an ordered list of string

D. It is an ordered list of functions

15 / 15

15. Among the given statements, which statement defines closures in JavaScript?

A. JavaScript is a function that is enclosed with references to its inner function scope

B. JavaScript is a function that is enclosed with references to its lexical environment

C. JavaScript is a function that is enclosed with the object to its inner function scope

D. None of the mentioned

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