[amp_mcq option1=”254″ option2=”256″ option3=”268″ option4=”155″ correct=”option1″]
The correct answer is A. 254 characters.
An email address is a unique identifier that is used to send and receive emails. It is typically composed of a username, followed by the “@” symbol, and then the domain name. The username can be up to 64 characters long, and the domain name can be up to 253 characters long. This means that the total length of an email address can be up to 254 characters.
Option B is incorrect because it is the maximum number of characters that can be stored in a single field in a database. However, this does not mean that the maximum length of an email address is 256 characters.
Option C is incorrect because it is the maximum number of characters that can be stored in a single line in a text file. However, this does not mean that the maximum length of an email address is 268 characters.
Option D is incorrect because it is the maximum number of characters that can be stored in a single character in a programming language. However, this does not mean that the maximum length of an email address is 155 characters.