How many unique characters does the standard ASCII encoding system represent?

Computer Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Computer Mcqscomputer-mcqs
Published
7 Jun 2017
Last updated
28 May 2026

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Explanation

The original ASCII (American Standard Code for Information Interchange) uses 7 bits to encode each character, allowing for 128 distinct symbols. While extended ASCII uses 8 bits and supports 256 characters, the basic ASCII set is limited to 128 unique codes. This system was designed to represent text and control commands in computers and communication devices, enabling standardized data exchange.

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