Learn MCQ Questions of Programming Languages JAVA, HTML, CSS, PHP, JAVASCRIPT, HTML MCQ Questions 1

Manisha Agrawal • 9.32K Points
Tutor III

Q. JVM stands for ____

(A) Java vacuum machine

(B) Java void machine

(D) Java Virtual model

Category: JAVA

Show Answer Discuss Share

Sandeep • 6.47K Points
Tutor III

Q. Which of the variables serve as symbolic constants

(A) Boolean

(B) Char

(D) Final

Category: JAVA

Show Answer Discuss Share

Correct answer - Option (D)
Explanation:

                                            Final keyword serves as constant in Java.

Chandani • 9.73K Points
Tutor III

Q. Which of the following is not javascript data types?

(A) Null type

(B) Undefined type

(D) All of the mentioned

Category: JavaScript

Show Answer Discuss Share

Correct answer - Option (D)
Explanation:

                                            JavaScript is a dynamic, loosely typed language. Variables in JavaScript aren’t tied to any specific value type, and each variable can be assigned and reassigned to values of all the types.

Chandani • 9.73K Points
Tutor III

Q. Will the following JavaScript code work?

Code:

var js = (function(x) {return x*x;}(10));

(A) Exception will be thrown

(B) Memory leak

(D) Yes, perfectly

Category: JavaScript

Show Answer Discuss Share

Correct answer - Option (D)
Explanation:

                                            For functions expressed as expressions, the function name is optional in Javascript. Sometimes function expressions are defined and used right away.

Chandani • 9.73K Points
Tutor III

Q. What will be the output of the following JavaScript code snippet?

Code:

// JavaScript Equalto Operators
function equalto()
{
    let num=10;
    if(num==="10")
        return true;
    else
        return false;
}

(A) false

(B) true

(D) runtime error

Category: JavaScript

Show Answer Discuss Share

Correct answer - Option (A)
Explanation:

                                            A === operator in JS is only true if the operands are of the same type and the contents match. Two strings are strictly equal when they have the same sequence of characters, same length, and same characters in corresponding positions. In this case, we are comparing an integer and a string so it will be false.

Chandani • 9.73K Points
Tutor III

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

Code:

// JavaScript Comparison Operators
function compare()
{
    let a=2;
    let b=2.0;
    if(a==b)
        return true;
    else
        return false;
}

(A) false

(B) true

(D) runtime error

Category: JavaScript

Show Answer Discuss Share

Correct answer - Option (B)
Explanation:

                                            The == in JS convert different types of operands to the same type before making the comparison whereas a strict comparison === results in true value if the operands are of the same type and the contents match.

Chandani • 9.73K Points
Tutor III

Q. 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

(D) It is an ordered list of functions

Category: JavaScript

Show Answer Discuss Share

Correct answer - Option (A)
Explanation:

                                            An array in JavaScript is an ordered list of values, each value is referred to as an element, and it is identified by an index. An array can include values of many sorts and the length of an array dynamically sized.

Chandani • 9.73K Points
Tutor III

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

Code:

<p id="demo"></p>
<script>
var js = 10;
js *= 5;
document.getElementById("demo").innerHTML = js;
</script>

(A) 10

(B) 50

(D) Error

Category: JavaScript

Show Answer Discuss Share

Correct answer - Option (B)
Explanation:

                                            The *= operator in javascript is a shorthand expression for the multiplication of a particular number. It is a combination of two operators * and = .