Computer Systems

Data Rep - Numbers

100

The largest positive integer that can be stored in 1 byte?

255

200

Convert 11000101

197

300

Convert 189 into binary

10111101

400

Floating Representation is used to store REAL numbers. The 2 elements stored are called? 

Mantissa 

Exponent

500

Identify the Mantissa and Exponent values from the following: 0.1876 x 10⁵

Exponent = 5

Mantissa = 1876

Data Rep - Text & Graphics

100

Capital A in the ASCII code is...?

65 = 01000001

200

A grid of pixels. Each pixel stores a binary colour code? What is?

Bitmapped Graphic

300

Describe how Vector graphics are stored in the computer's memory?

Objects are stored and defined by a set of attributes. e.g. line colour, fill colour, x,y coordinates

400

How many bits are required for the following: 

Troon Fest#1

96bits

500

Higher - What text encoding system uses 16 bits per character to provide a much larger character set than the Extended ASCII?

Unicode. UTF-16

Computer Structure

100

The 3 parts of the CPU are...?

ALU, Registers & Control Unit

200

The part of the processor that coordinates the timing of operations...

Control Unit

300

Temporary storage locations on the CPU are...

Registers

400

The part of the system that transfers instructions from RAM to the CPU during a read operation or from the CPU to RAM during a write operation.

Data bus

500

Describe the concept of addressability in relation to RAM?

Each memory location is identified by a unique binary address.

Security & Environment

100

The security measure used to scramble data into an unreadable form. What is?

Encryption

200

What security measure prevents malware from gaining access to your computer system or network?

Firewall

300

You can reduce your environmental impact when using a Computer  System by...

Reducing screen brightness

Using sleep mode after period of inactivity.

Don't leave on standby when not in use.

400

Using a caesar cipher key of + 2 what word is encrypted below:

ECV

CAT

500

What techniques does a Firewall use to protect your system? Describe 2

IP Blocking

Data Packet Filtering

Lucky Dip

100

RAM stands for... 

Random Access Memory

200

1024 Megabytes equals 1...

What is the file extension for an external CSS style sheet?

Gigabyte

300

State the translator that converts HLL into machine code in one operation?

Compiler

400

ASCII stands for?

American Standard Code for Information Interchange

500

Describe an advantage an Interpreter has over a Compiler?

Translates line by line so error reporting occurs after each line.