How many standard codes are there in ASCII?

128

256

512

American Standard Code for Information Interchange (ASCII) is the most commonly used format for text files in computers. ASCII is currently in two formats: standard ASCII and extended ASCII.
In standard ASCII format, there are 128 symbols and each alphabetic, numeric, or special character is represented with a 7-bit binary number.
In extended ASCII format, there are 256 characters represented by 8 bits, and these additional characters are used to represent additional symbols (e.g. foreign letters, currency symbols, drawing symbols, etc.).

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