7 - Javascript

Question 1

Name some JS math objects

Answer 1

Math.max(x,y,z….,n)
Math.min….
Math.pow(x, y) (x to the power of y)
Math.sqrt(x)

Question 2

Name some examples of the ‘document. object methods

Answer 2

document. write(string)

document. writeln(string)

Question 3

Example of a window object

Answer 3

window.alert(“Welcome to MMU”);

Question 4

Properties are object attributes, true or false?

Answer 4

True document is the object, bgcolor is the property of:

document.bgcolor:

Question 5

What are methods?

Answer 5

Methods are actions applied to objects ie document.write(“Hello World”);

• document is the object
• write is the method

Question 6

onclick is a…

Answer 6

JS event:

<br></br>

<a>
Hover Me!</a>

Question 7

Functions are named statements that perform tasks?

Answer 7

True. ie:

function myFunction (){
statement here
}

Question 8

What can be popped up to get the user to enter something?

Answer 8

window.prompt(“Enter first number”, “0”);

Question 9

How do we call the following function in a button?

function myFunction() {
   	document.write(Date());
}

Answer 9

Try it

Question 10

How do we get an element by its id?

Answer 10

If the top of the code has:

<p> The date will appear here </p>

document,getElementById(“date”[this calls the date element].innerHTML = “21st Jan 2013”[this passes this text back to the date id];

Question 11

The 5 layers of the networking model are:

Answer 11

Application Layer (http)
Transport layer (tcp)
Internetwork layer (ip)
Network interface layer (ethernet)
Physical layer