A bit is a single binary digit (0 or 1), the smallest unit of digital data. A byte is a group of 8 bits that can represent 256 different values (0 to 255), enough to encode one text character. All digital storage and communication is measured in bits and bytes.
A bit is the smallest piece of data. A byte is enough to store one character.
Showing a random 20 of 50 problems.
Example 1
hard
How many bytes are in 2 GiB?
Example 2
medium
How many bytes are needed to store the text "COMPUTE" in ASCII (one byte per character)?
Example 3
medium
You need a unique code for each of 500 items. How many bits and how many whole bytes are required?
Example 4
easy
How many different values can 2 bits represent?All 4 two-bit patterns: 00, 01, 10, 11 — confirming 2^2 = 4 values
Example 5
easy
What is the smallest unit of digital data?
Example 6
medium
An image is 800 × 600 pixels. Each pixel uses 24 bits (8 bits each for red, green, blue). What is the uncompressed file size in megabytes?
Example 7
medium
A value needs 12 bits. How many whole bytes are required to store it?
Example 8
easy
How many values can 4 bits represent?
Example 9
medium
How many bits does a single ASCII character require?
Example 10
easy
How many bytes are in 16 bits?
Example 11
easy
A file is `8 bits`. How many bytes is that?
Example 12
challenge
To address every byte in 1 MiB (2^20 bytes) of memory uniquely, how many address bits are required?
Example 13
medium
Adding one bit to a value's width changes the number of representable values how?Each extra bit doubles the number of representable values: 2^1 = 2, 2^2 = 4, …, 2^6 = 64
Example 14
easy
How many values can 6 bits represent?
Example 15
challenge
A counter is 8 bits and currently holds 255. It is incremented by 1. What value does it hold (assuming unsigned wraparound)?Top row = 255 (11111111); bottom row = 0 (00000000) after overflow — unsigned 8-bit wraparound
Example 16
medium
A `200 Mb/s` connection. How many megabytes per second is that (approx, using 8 bits per byte)?
Example 17
medium
How many bytes are needed to store the text "HELLO" in ASCII (one byte per character)?
Example 18
medium
Removing one bit from a value's width changes the number of representable values how?
Example 19
medium
A pixel uses 2 bytes (16 bits) for color. How many distinct colors can it represent?
Example 20
hard
You're storing 70,000 unique IDs. What is the minimum number of WHOLE BYTES per ID?