Section 1: Representation of Numbers Flashcards
1
Q
Q: What is the binary (Base 2) system used for in computers?
A
A: It represents data using 0s and 1s, corresponding to electrical states (on/off).
2
Q
Q: How do you convert a binary number to a decimal number?
A
A: Sum the binary digits, each multiplied by 2^n, where n is the position from the right, starting at 0.
3
Q
Q: How do you convert a decimal number to binary?
A
A: Use successive division by 2, recording remainders, and read them from bottom to top.
4
Q
Q: What is hexadecimal (Base 16), and why is it useful?
A
A: Hexadecimal is a compact way to represent binary, grouping 4 binary digits into one hex digit (0–9, A–F).
5
Q
Q: How are octal (Base 8) numbers related to binary?
A
A: Octal groups binary digits in sets of 3.
