w3schools JavaScript quiz
1. Inside which HTML element do we put the JavaScript? <scripting> <script> <js> <javascript>
<script>
25. Is JavaScript case-sensitive? No Yes
Yes
12. How does a FOR loop start? for i = 1 to 5 for (i = 0; i <= 5) for (i = 0; i <= 5; i++) for (i <= 5; i++)
for (i = 0; i <= 5; i++)
7. How do you create a function in JavaScript? function = myFunction() function myFunction() function:myFunction()
function myFunction()
10. How to write an IF statement for executing some code if "i" is NOT equal to 5? if (i != 5) if (i <> 5) if i =! 5 then if i <> 5
if (i != 5)
9. How to write an IF statement in JavaScript? if (i == 5) if i == 5 then if i = 5 if i = 5 then
if (i == 5)
11. How does a WHILE loop start? while (i <= 10; i++) while (i <= 10) while i = 1 to 10
while (i <= 10)
13. How can you add a comment in a JavaScript? 'This is a comment <!--This is a comment--> //This is a comment
//This is a comment
19. JavaScript is the same as Java. True False
False
14. How to insert a comment that has more than one line? /*This comment has more than one line*/ //This comment has more than one line// <!--This comment has more than one line-->
/*This comment has more than one line*/
4. What is the correct syntax for referring to an external script called "xxx.js"? <script name="xxx.js"> <script src="xxx.js"> <script href="xxx.js">
<script src="xxx.js">
22. How do you declare a JavaScript variable? var carName; v carName; variable carName;
var carName;
5. The external JavaScript file must contain the <script> tag. False True
False
2. What is the correct JavaScript syntax to change the content of the HTML element below? <p id="demo">This is a demonstration.</p> document.getElement("p").innerHTML = "Hello World!"; #demo.innerHTML = "Hello World!"; document.getElementByName("p").innerHTML = "Hello World!"; document.getElementById("demo").innerHTML = "Hello World!";
document.getElementById("demo").innerHTML = "Hello World!";
18. What is the correct JavaScript syntax for opening a new window called "w2" ? w2 = window.open("http://www.w3schools.com"); w2 = window.new("http://www.w3schools.com");
w2 = window.open("http://www.w3schools.com");
23. Which operator is used to assign a value to a variable? x = - *
=
3. Where is the correct place to insert a JavaScript? The <body> section Both the <head> section and the <body> section are correct The <head> section
Both the <head> section and the <body> section are correct
17. How do you find the number with the highest value of x and y? ceil(x, y) Math.max(x, y) Math.ceil(x, y) top(x, y)
Math.max(x, y)
16. How do you round the number 7.25, to the nearest integer? rnd(7.25) Math.rnd(7.25) Math.round(7.25) round(7.25)
Math.round(7.25)
6. How do you write "Hello World" in an alert box? alertBox("Hello World"); alert("Hello World"); msgBox("Hello World"); msg("Hello World");
alert("Hello World");
8. How do you call a function named "myFunction"? myFunction() call function myFunction() call myFunction()
myFunction()
20. How can you detect the client's browser name? client.navName navigator.appName browser.name
navigator.appName
21. Which event occurs when the user clicks on an HTML element? onclick onmouseover onmouseclick onchange
onclick
24. What will the following code return: Boolean(10 > 9) true false NaN
true
15. What is the correct way to write a JavaScript array? var colors = (1:"red", 2:"green", 3:"blue") var colors = "red", "green", "blue" var colors = ["red", "green", "blue"] var colors = 1 = ("red"), 2 = ("green"), 3 = ("blue")
var colors = ["red", "green", "blue"]