1. Where is the correct place to insert a JavaScript?
answer : Both the <head> section and the <body> section are correct
2. What is the correct syntax for referring to an external script called "xxx.js"?
answer : <script src="xxx.js">
3. The external JavaScript file must contain the <script> tag.
answer : False
4. How do you create a function in JavaScript?
answer : function myFunction()
5. How to write an IF statement for executing some code if "i" is NOT equal to 5?
answer : if (i != 5)
6. How can you add a comment in a JavaScript?
answer : //This is a comment
7. How to insert a comment that has more than one line?
answer : /*This comment has
more than one line*/
8. How do you declare a JavaScript variable?
answer: var carName;
9.output for this(check this logic same qus will not cum)
<script>
var x = 16 + 4 + "Volvo";
document.getElementById("demo").innerHTML = x;
</script>
answer: 20Volvo
10.output for this(check this logic same qus will not cum)
<script>
var x = "Volvo" + 16 + 4;
document.getElementById("demo").innerHTML = x;
</script>
answer: Volvo164
11.which style is not used in javascript
answer: Hyphens
12.null === undefined------------->>false
null == undefined--------------->>true
13. switch(sample) { switch(sample) {
case "1" case "1"
text = "thirteen"; text = "thirteen";
BREAK;
case "2" case "2"
text = "forteen"; text = "forteen";
BREAK; BREAK;
case "3" case "3"
text = "fifteen"; text = "fifteen";
BREAK; BREAK;
default default
text = "default."; text = "default.";
} BREAK }
14.
ANS:-DEFAULT THIRTEEN FORTEEN
15.output for this(check this logic same qus will not cum)
<script>
var x = 5 + C + 5*3;
document.getElementById("demo").innerHTML = x;
</script>
answer:
16.How to write using console in browser?
answer: console.log()
17.How java script code will be written?
answer: inside curly braces {}
18.How will you assign a value to variable?
answer: (=)assignment operator.
19.Without <script> tags if java script is written how it will consider?
1.ignore the lines.
2.print as plain text.
3.print in web page.
4.consider as html code
answer:print as plain text.
20.what is the correct keyword to declare a function?
answer:function.
21.which program is correct when user clicks on a button?
answer:
<p id="demo">A Paragraph</p>
<button type="button" onclick="myFunction()">Try it</button>
<script>
function myFunction() {
document.getElementById("demo").innerHTML = "Paragraph changed.";
}
</script>
22. <script>
document.getElementById(typeof false);
answer: boolean.