Flashcards
Representation of data in computer systems
Cards in this deck (48)
- 1What is the Base-10 number system known as?Denary
- 2What is the Base-2 number system known as?Binary
- 3What digits can be used in the binary number system?0s and 1s
- 4What is the binary value 11111111 in denary?255
- 5How many bits are there in a byte?8
- 6How many bytes are there in a kilobyte?1024
- 7How many bits are there in a nibble?4
- 8What name is given to the unit of data larger than a kilobyte?Megabyte
- 9What does 1024 gigabytes equal?1 terabyte
- 10What is the binary value 00101011 in denary?43
- 11What is the binary value 00010010 in denary?18
- 12What is the denary value 108 in binary?01101100
- 13What is the denary value 16 in binary?00010000
- 14What is the denary value 62 in binary?00111110
- 15What is the result of this in binary? 00100100 + 0000110100110001
- 16What is the result of this in denary? 11000101 + 00001100209
- 17What is the result of this in binary? 11010011 - 1000100101001010
- 18What is the result of this in denary? 10010101 - 0100101174
- 19What is the Base-16 number system known as?Hexadecimal
- 20What does 'overflow' mean?When a number is too large to fit into the allocated number of bits. Some bits are lost, leaving an incorrect value.
- 21What is the denary value 10 in hexadecimal?A
- 22What is the hexadecimal value F in denary?15
- 23What is the binary value 0101 in hexadecimal?5
- 24What is the denary value 201 in hexadecimal?C9
- 25What is the hexadecimal value F3 in denary?243
- 26What is the binary value 01001100 in hexadecimal?4C
- 27What is the hexadecimal value 3D in binary?00111101
- 28What is a character set?The characters available to a computer
- 29How many bits does ASCII use for each character?7
- 30What language is ASCII designed for?English
- 31What does ASCII stand for?American Standard Code for Information Interchange
- 32How many bits does the Unicode character encoding system use?Up to 32 bits, but it can also use a 16-bit version
- 33How many character possibilities does Unicode allow for?More than 4 billion possibilities
- 34What is colour depth/bit depth?The number of bits used for each pixel. More bits mean more colours can be represented.
- 35What is resolution?The number of pixels per unit, eg. ppi (pixels per inch)
- 36What is metadata?Information about the image data which allows the computer to recreate the image from binary data in the file. It must comtain height and width (in pixels) and the colour depth in bpp (bits per pixel)
- 37What is the term for sound that continuously varies?Analogue
- 38How is analogue sound converted into digital sound?The sound wave is sampled at set intervals and the values are recorded.
- 39What is meant by 'sample rate'?The number of times the sound is sampled per second.
- 40What is sample rate measured in?Hz (Hertz), eg. 50Hz = 50 samples taken per second
- 41What is meant by 'bit rate'?The space available for each second, measured in kilobits per second (kbits/s).
For example, 128kbits/s is 128 kilobits per second of sampled sound. - 42What is meant by an 'address'?A location in main memory where data or instructions are stored
- 43What two parts is an instruction decoded into?Operator and operand
- 44What is meant by the term 'register'?A special fast access part of the CPU, which stores data in use by the CPU
- 45What is a program counter?A register in the CPU, which keeps the address of the next instruction
- 46What is an operator?Part of an instruction which tells the CPU what to do
- 47What is an operand?The part of an instruction what to apply the operation to
- 48What is an accumulator?A register in the CPU which stores data currently in use by the CPU
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- Description
- Flashcards for OCR Computing, section 4 (representation of data in computer systems)
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- san wis
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- Created by lilymate · Apr 26, 2016
- Copied by san wis · Apr 26, 2016
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