JavaScript Questions & Answers – Embedding JavaScript in HTML

This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Embedding JavaScript in HTML”.

1. Which of the following is a way of embedding Client-side JavaScript code within HTML documents?
a) From javascript:encoding
b) External file specified by the src attribute of a “script” tag
c) By using a header tag
d) By using body tag
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2. When does JavaScript code appear inline within an HTML file?
a) Between the “script” tag
b) Outside the “script” tag
c) Between or Outside the “script” tag
d) Between the header tag
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3. Which character in JavaScript code will be interpreted as XML markup?
a) !
b) >
c) &
d) .
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4. Which is the root element in a HTML document?
a) HTML
b) HEAD
c) SCRIPT
d) BODY
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5. What is the code for getting the current time?
a) now = new Date();
b) var now = new Date();
c) var now = Date();
d) var now = new Date(current);
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6. What is the code to start displaying the time when the document loads?
a) onload = displayTime;
b) window. = displayTime;
c) window.onload = displayTime;
d) window.onload = start;
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7. One of the main advantage of using src attribute is ____________
a) It becomes self-cached
b) It makes the HTML file modular
c) It restricts manipulation in the HTML file
d) It simplifies the HTML files
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8. What will be done if more than one page requires a file of JavaScript code?
a) Downloads that many times
b) Retrives from the browser cache
c) Must be re executed
d) Must be included in all the pages
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9. What is the default value of the type attribute?
a) text/css
b) text/javascript
c) html
d) xml
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10. The language is commonly used to __________________
a) Specify the user’s language
b) Specify the language going to be scripted
c) No longer in use
d) Specify the programmer’s favourable language
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11. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
var numbers1 = [4, 9];
var numbers2 = numbers1.map(myFunction);
document.getElementById("demo").innerHTML = numbers2;
function myFunction(value, index, array) 
{
  return value * 2;
}
</script>

a) 8 9
b) 8 18
c) 4 9
d) Error
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12. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
var numbers = [45, 4, 9, 16, 25];
var ans = numbers.reduce(myFunction);
document.getElementById("demo").innerHTML = sum;
function myFunction(total, value, index, array) 
{
  return total + value;
}
</script>

a) 100
b) 99
c) 0
d) error
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13. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
var numbers = [45, 4, 9, 16, 25];
var arr= numbers.every(myFunction);
document.getElementById("demo").innerHTML =arr;
function myFunction(value, index, array) 
{
   return value > 18;
}
</script>

a) true
b) false
c) 0
d) error
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14. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
var numbers = [45, 4, 9, 16, 25];
var someOver18 = numbers.some(myFunction);
document.getElementById("demo").innerHTML = "Some over 18 is " + someOver18;
function myFunction(value, index, array) 
{
  return value > 10;
}
</script>

a) True
b) False
c) Error
d) Undefined
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15. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
var arr = ["1", "1", "2", "1"];
var a = arr.lastIndexOf("1");
document.getElementById("demo").innerHTML = (a + 1);
</script>

a) 2
b) 3
c) 4
d) 0
View Answer

Sanfoundry Global Education & Learning Series – Javascript Programming.