computer science 💀

The Associative Law means

Numbers equal the same, no matter which way round they are.

Data + Meaning = ?

Information

ASCII stands for

American standard code for information interchange

How many cores is a dec core

10

What is lossless compression

Is not permanent and temporary

In ASCII, how many bits is 1 character

8 bits

How do you work out the compression file size with only the original size and compression ratio

E.g 200MB 10:1 ?

Divide 200 by 10, then multiply by 1

What are the main components inside a CPU

Arithmetic Logic Unit

Register

Control Unit

What is overflow

Overflow is where a value exceeds the maximum value a register can hold. If you had the value 10000000 stored in an 8 bit register, the result would be 00000000, as it’s lost the leading one, destroying the value.

How many bits in a nibble

4

What is lossy compression

Permanent

What types of Meta Data are included in all files

File name

File type

File size

How to convert binary to Denary

Add headings above numbers, circle the values with 1 underneath then add them together

How many cores in a hex core

6

To go from bits to bytes you…

Divide by 8

What is cache

The fastest way to process data, type of RAM.

More the better, but is expensive

Has 3 levels, each having a high/low clock speed of memory and a high/low amount of memory

What are the key components of a computer

CPU

Motherboard

RAM

What is the Idempotent Law

A.A = A

A +A = A

Level 1 cache is allocated to

1 single core

The fastest memory, but the smallest amount

To up from bytes to bits you…

Multiply by 8

How many calculations per second is 1GHz

1000MHz

Binary shifting

Shifting is where all the numbers shift one place left or right.

PC

Program Counter

CIR

Current Instruction Register

ACC

Accumulator

MAR

Memory Address Register

MDR

Memory Data Register