Flashcards
Computing Unit 3 and 4
Cards in this deck (28)
- 1What base is Decimal ?Base 10
- 2What base is Binary ?base 2
- 3What base is Hexadecimal ?base 16
- 4Why is hexadecimal used ?It is used to simplify how binary is represented.
- 5Binary to Decimal Binary to hexadecimal decimal to hexadecimal1111 1111 = 255
1111 1111 = FF
255 = FF - 6BitA bit is either 0 or 1
- 7ByteA byte is a group of 8 bits
- 8What does b represent ?It is a bit
- 9What does B represent ?It is a byte
- 10How does kilo-, mega-, giga- ,tera- correspond to qualities of bytes?kilo, 1 kB is 1,000 bytes
mega, 1 MB is 1,000 kilobytes
giga, 1 GB is 1,000 Megabytes
tera, 1 TB is 1,000 Gigabytes. - 11What is 00110001+ 00000011+ 01010101=010001001 = 137
- 12What is 'B' in 7 bit ASCII ?66
- 13What does ASCII stand for?American standard code for information interchange
- 14What was the original language for ASCII?American
- 15Why was Unicode created?It was created because you can speak in different languages and so you can use emojis. Also you can use accents.
- 16What is extended ASCII?8 bit ACII
- 17Pixel shot for?Picture element
- 18ASCII 7 bit uses a certain number of characters that can be encoded, what is this number?127
- 19What are the limitations of ACSII?It's only 7 bits.
Many languages have more than 128 characters.
You can only use American language. - 20Why we use binary to represent data in computers?It can be either on or off
- 21Why does cache size affect the CPU performance?The larger the cache the more instructions can be accessed quicker.
- 22Four events that take place during the fetch-execute cycle?Fetch
Decode
Execute
Store - 23Two differences between ASCII and UNICODEACSII uses 7 bit
UNICODE is 16/32 bits - 24How many colours can be represented by a with a 2 bit colour depth.4 colours
- 25What is meant by sample resolution depth in regards to representing sound as binary?Number of bits per sample.
- 26Two differences between ROM and RAMRom is non-volatile and RAM is.
ROM is typically smaller than RAM. - 27Two examples of secondary storage?Optical drive
Magnetic drive - 28ROMRead only memory you can only read from it.
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- Flashcards on Computing Unit 3 and 4, created by Arjun Rana on 07/03/2017.
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- Arjun Rana
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