1.2.4 Data Storage Flashcards
What is 0101 in denary? (1)
5
What is 11001111 in denary? (1)
207
What is 151 in binary? (2)
10010111 (1 mark per nibble)
What are the rules of binary addition? (4)
0 + 0 = 0. 0 + 1 = 1. 1 + 1 = 0 carry 1. 1 + 1 + 1 = 1 carry 1.
What is an overflow error? (2)
An extra carry bit (1) that cannot fit into the bits provided (1).
Convert 39 from hexadecimal to denary (1)
57
Convert 203 from denary to hexadecimal (2)
CB (one mark per digit)
Convert 10010011 from binary to hexadecimal (2)
93 (one mark per digit)
Convert FA from hexadecimal to binary (2)
11111010 (one mark per nibble)
How can you multiply a binary number by 2? (1)
Move all of the bits 1 place to the left.
How can you divide a binary number by 2? (1)
Move all the bits 1 place to the right.
What is a character set? (1)
The characters a computer system understands / displays.
How many potential characters can you store with a byte? (1)
256
How many potential characters can you store with 7 bits? (1)
128
How many characters can ASCII represent? (1)
128