Flashcards
1.4.1 Data types
Cards in this deck (15)
- 1Most significant bit (MSB),the bit position in a binary value having the greatest value (left one)
- 2Sign + magnitude ,The MSB is used to indicate the sign, 0 is positive, 1 is negative
- 3Twos complement,More effective, the MSB is used to store the negative of the largest number
- 4Overflow error,When a calculation causes the value to exceed the amount of bits, this leads the extra bits to be deleted, causes logical errors and could cause the system to crash
- 5How does the size of the mantissa affect the number,More bits in the mantissa improves the accuracy but reduces the range
- 6How does the size of the exponent affect the number,More bits in the exponent improves the range but reduces the accuracy
- 7Bitwise operation,a binary operation that takes 2 bit patterns of equal length and performs a logical operation on them
- 8NOT operation on a binary number,reverses the value of each bit
- 9AND operation on a binary number,useful for checking conditions stored in a binary value, masking with 1 returns the operand bit value, masking with a 0 excludes the operand bit
- 10OR operation on a binary number,resets individual bits, masking with a 1 will set the bit to 1, masking with 0 will return to original bit
- 11XOR operation on a binary number,checks the operand bit and mask bit are the same, if theyre the same it will return 0, if not return 1
- 12Operand,bit pattern being operated on
- 13Mask,bit pattern being used with the operand
- 14ASCII,7 bits, 128 characters
- 15Unicode,16/32 bits, 65,536/4 billion
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- A level Computer Science Flashcards on 1.4.1 Data types, created by Ben Rawlins on 10/04/2024.
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- Ben Rawlins
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