In positional numeral systems used for digital electronics, the hexadecimal digit set extends from 0–9 and A through which final letter?

Introduction / Context:
Hexadecimal (base 16) is widely used to concisely express binary values, since each hex digit represents exactly 4 bits. Knowing the exact digit range is foundational for reading memory dumps and configuring low-level systems.

Given Data / Assumptions:

• Hexadecimal base is 16.
• Decimal digits cover 0–9; additional symbols map to 10–15.
• Letters A–F represent 10–15 respectively.

Concept / Approach:
The hex sequence is {0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F}. Therefore, the final letter in the sequence is F. This mapping directly aligns with 4-bit binary: 0000 to 1111 equals 0 to F.

Step-by-Step Solution:

Verification / Alternative check:
Any standard ASCII/Unicode table and programming language formatters (e.g., printf %X) confirm that hex digits end at F.

Why Other Options Are Wrong:

• E: second-to-last; equals decimal 14.
• G: not a valid hex digit.
• D: equals decimal 13; not the final letter.
• None of the above: incorrect because F is correct.

Common Pitfalls:
Confusing base-16 with base-14 or assuming letters continue beyond F; misreading lowercase vs uppercase (both are accepted, but the set still ends at F).

Final Answer:
F