1.2 Memory & Storage full topic revision | OCR J277 9-1 Computer Science

Revision notes and explanations for 1.2 Memory & Storage - OCR J277
9-1 Computer Science.

0:00 What is memory?
1:17 What is read-only memory?
2:08 What is virtual memory?
3:08 Exam questions on Memory
3:59 What is secondary storage?
5:19 What are the types of storage?
10:25 Exam questions on storage
11:10 What is binary?
12:40 What does file size mean?
13:03 Different storage amounts
14:40 How to convert file sizes without a calculator
17:06 Exam questions on file size conversions
17:45 Conversions between denary and binary
18:34 How to count in binary
20:29 How to carry out denary & binary conversions
23:38 Exam questions on binary conversions
25:20 How to perform binary addition
28:08 Adding binary exam example with overflow
29:57 What is an overflow error?
30:39 Exam questions on binary addition
31:15 How to perform a binary shift
34:22 What effect does a binary shift to the left have?
35:20 What effect does a binary shift to the right have?
35:40 Exam questions on binary shifts
36:09 What is a character set?
37:25 What is ASCII?
38:13 What is UNICODE?
39:00 Remembering the ASCII binary alphabet
40:58 Exam questions on character sets
41:46 What is an image?
42:05 What is colour depth?
43:43 What is image resolution?
44:47 Calculating an image file size in bits
45:46 What is metadata?
46:26 Exam questions on image representation
47:32 How is sound sampled?
47:50 How is sound converted?
48:23 What affects the size and quality of a sound?
49:25 Calculating the size of a sound file in bits
51:27 Exam questions on sound representation
52:41 What is compression?
52:49 Why would you compress a file?
53:35 Types of compression
57:58 Exam questions on compression
__________________________________________________________

I'd recommend pausing the video on the questions at the end to test yourself on this topic - additionally, make yourself flash cards to test yourself, example:

On the front: what affects the CPU performance?
On the back: The CPU clock speed will determine how many FDE cycles can be performed in one second. The CPU can execute more instructions with additional cores as each core works independently.

Mr Moore

__________________________________________________________

#computerscience #revision #memoryandstorage

1.2 Memory & Storage full topic revision | OCR J277 9-1 Computer Science
1.2 Memory & Storage full topic revision | OCR J277 9-1 Computer Science
OCR Computer Science
OCR Computer Science
Computer Science GCSE
Mr Moore Computer Science
Mr Moore GCSE Computer Science
9-1 OCR Computer Science
1.1 systems architecture
J277
J277 computer science j277 revision
Computer science revision
OCR j277 computer science
What is compression?
What is compression?
lossy compression
lossless compression
lossy and lossless compression
lossy compression explained
lossless compression explained