FC0-U71 Tech Concepts and Terminology Practice Question
A technician is explaining how data is represented and processed in a computer. Which TWO of the following statements accurately describe the relationship between bits, bytes, and storage capacities? (Choose two.)
⚠ Common exam trap
The trap here is assuming that kilobyte always means 1,000 bytes, when in many computing contexts it historically meant 1,024 bytes, and confusing the order of magnitude between megabytes and gigabytes.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A nibble is half a byte and can represent 16 different values.
A byte is 8 bits and can represent 256 values, and a nibble is 4 bits with 16 possible values. These two statements accurately describe standard data units. The other statements contain common misconceptions about decimal versus binary prefixes, unit order, and the nature of a bit. The technician should use these correct relationships to explain data representation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A kilobyte (KB) is always equal to 1,000 bytes in all contexts.
Why it's wrong here
While the decimal definition of a kilobyte is 1,000 bytes, in many computing contexts it historically referred to 1,024 bytes. The binary prefix kibibyte (KiB) explicitly means 1,024 bytes. Storage manufacturers often use decimal, while operating systems may use binary. Because the statement says 'always,' it is incorrect. The technician should recognize that context determines whether KB means 1,000 or 1,024.
- ✗
A megabyte (MB) is larger than a gigabyte (GB).
Why it's wrong here
A megabyte is smaller than a gigabyte. One gigabyte is typically 1,024 megabytes in binary terms, or 1,000 megabytes in decimal terms. The statement reverses the order of magnitude. In the scenario, the technician should clarify that GB represents a larger unit than MB. This is a common point of confusion, but the correct hierarchy is byte, kilobyte, megabyte, gigabyte, terabyte.
- ✓
A nibble is half a byte and can represent 16 different values.
Why this is correct
A nibble is 4 bits, which is half of an 8-bit byte. With 4 bits, there are 2^4 = 16 possible combinations, so it can represent values from 0 to 15. This is often used in hexadecimal notation, where each hex digit corresponds to one nibble. This statement is accurate and useful for understanding how binary data is grouped and displayed. The technician should confirm this as a correct description.
- ✗
A bit can store more than two states, allowing it to represent multiple characters.
Why it's wrong here
A bit is the smallest unit of data and can exist in only one of two states: 0 or 1. It cannot represent more than two states. Multiple bits are combined to represent more complex data, but a single bit is binary. The statement is incorrect because it misrepresents the fundamental nature of a bit. In the scenario, the technician should correct this misconception by explaining that bits are binary and combine to form larger units.
- ✓
A byte consists of 8 bits and can represent 256 different values.
Why this is correct
A byte is defined as 8 bits, and since each bit has two possible states, 2^8 equals 256 distinct combinations. This allows a byte to represent values from 0 to 255 in unsigned form. This statement is accurate and fundamental to understanding data representation. In the scenario, the technician should confirm that a byte's capacity to represent 256 values is correct, as it underpins character encoding and binary arithmetic.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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