Select all character sets that are allowed in base64 string / sequence.Choose 2 options.

Question

BlackTom AI · Accepted Answer

To determine which character sets are allowed in a base64 string, it helps to recall the base64 alphabet and padding rules.
Option a: Special symbols such as ;"% — These characters are not part of the base64 alphabet. Base64 uses a specific 64-character set and does not include semicolons, quotes, percent signs, or similar symbols, so this is incorrect.
Option b: !@# symbols — Similar issue here: these punctuation marks are not included in the base64 64-character set, so this option is also incorrect.
Option c: Alphanumeric values — The base64 alphabet is composed of A–Z, a–z, and 0–9, which are precisely alphanumeric characters. This option correctly describes part of the allowed set.
Option d: + / = symbols — The base64 alphabet includes the plus (+) and slash (/) characters as the two non-alphanumeric symbols in its 64-character set, and = is used for padding in base64-encoded strings. This option correctly identifies allowed symbols, including the padding character. 
In summary, options c and d correctly describe characters that can appear in base64 strings, while options a and b describe characters that are not part of the base64 character set.

MTH-1235-001 - 51223 - 202505 Final Exam

Select all character sets that are allowed in base64 string / sequence.Choose 2 options.

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