Explore topic-wise MCQs in Javascript.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Javascript knowledge and support exam preparation. Choose a topic below to get started.

Explore topic-wise MCQs in Javascript.

Which is a more efficient code snippet?Code 1 :for(var n=10;n&gt;=1;n--){ document.writeln(n);}Code 2 :var n=10;while(n&gt;=1){ document.writeln(n); n++;}

What would be the most appropriate output for the following code snippet?var p=15 , q=10var object = { p : 20 }with(object) { alert(q)}

What happens in the following javascript code snippet?var num = 1;while (num &lt; 15) { console.log(num); num++;}

Consider the following statementsswitch(expression){ statements}In the above switch syntax, the expression is compared with the case labels using which of the following operator(s)?

Which is a more efficient code snippet?

A conditional expression is also called a _______________.

When an empty statement is encountered, a JavaScript interpreter __________.

What would be the most appropriate output for the following code snippet?

What happens in the following javascript code snippet?

The var and function are __________.

Which is a more efficient code snippet?Code 1 :for(var n=10;n>=1;n--){ document.writeln(n);}Code 2 :var n=10;while(n>=1){ document.writeln(n); n++;}

What happens in the following javascript code snippet?var num = 1;while (num < 15) { console.log(num); num++;}