Title: Characters
Course: Quiz Statistics Report Test Course

Q: Match the number values to each description.

All questions refer to a commonly used character set that uses 7 bits to code each character.
- The largest number you can have with seven bits is | 127
- The lowest number you can have with seven bits is | 000
- This means that the number of different characters in the character set are | 128
- The first character in this character set is called 'NULL', the denary number code for it is | 0
- The character code for A is 065 and B is 066, the character code for 'H' is | 072
- The last character in this character set is called 'DEL', the denary number code for it is | 127
Also offered: 071; 128; 073; 001; 255; 256; 070; 109; 254

Q: Match up the character set with the correct definition.
- A 7 bit character set with the full British alphabet and punctuation symbols is called | ASCII
- A 16 bit character set with 65,536 characters including international alphabets is called | Unicode
- An 8 bit character set with 255 characters is called | EBCDIC
Also offered: Unikey; Bitkey; Bitcode; USDICC; Qwerty

Q: When a user presses a key on a computer keyboard, what happens next?
- The keyboard controller detects which key has been pressed and a number code to represent that character is transmitted in binary to the computer.
- The keyboard controller CPU sends the character to the computer as an ASCII string
- A NULL code is detected and transmitted to the keyboard controller CPU
- The keyboard controller uses a hexidecimal register to transmit the character data to the input bus on the computer
- The number code for the keyboard is converted from binary to denary and then the keyboard controller sends it to the computer
- The keyboard controller checks to see if the user has selected a Unicode character, if not it waits for a different key to be pressed
A: The keyboard controller detects which key has been pressed and a number code to represent that character is transmitted in binary to the computer.