Yr 9 Unit 1 - Cracking the Code

The way binary codes are used to represent different types of data such as numbers and letters is known as?

• Photographic manipulation

• Binary coding

• Data Representation

• Data manipulation

The binary code 1111111 equals what in denary code?

• 0 - 200

• 0 - 255

• 256

• 65356

What is ASCII used for?

• transferring 16 bit hexadecimal codes

• transferring data electronically

• Digitising music files for use by by users

• Unlocking the BIOS

How many different characters could be represented using 7 bits?

• 100

• 87

• 120

• 128

Answer explanation

A seven bit system can include 128 characters from 0 - 127

Binary 1001011 equals the letter K on an ASCII keyboard

• TRUE

• FALSE

Answer explanation

The ASCII table has a unique binary code for every character. Starting with A =01

B=10 C=11 D=100.

Can you see the pattern emerging? Because it is binary ( 0 and 1) the count moves the '1' up every time the letter changes.

How many different characters can be represented on a standard keyboard?

Answer explanation

There is no standard keyboard, you may find 101 or 107. However, it is widely accepted that most keyboards have 104 characters. Want to count your Qwerty Zzzzzz

Do you think a 7 bit code provides enough bits to represent all the characters in the English language?

• YES

• NO

• NO IDEA

What other systems convert binary code into text?

• EBCDIC

• UNICODE

• BAUDOT

• IBM

What is this meme describing?

• Getting rid of a pest on the mobile phone

• A bug keeping a girl awake

• debugging a program

• Clearing a command line mistake

What is Groot trying to do?