C++ Programming MCQ Test 1 : Question 3

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Which of the following is a correct identifier in C++ ?

abc_1234

$abc_var

7ABC_var

7abc.var

sec

Please first select an option.

• abc_1234: This is a valid identifier as it starts with a letter "a" and contains letters, digits, and underscores.
• $abc_var: This is not a valid identifier because the first character is a dollar sign ($), which is not allowed in C++ identifiers.
• 7ABC_var: This is not a valid identifier because it starts with a digit "7." Identifiers cannot begin with a digit; they must start with a letter or underscore.
• 7abc.var: This is not a valid identifier because it contains a dot (.) character. Dot is not allowed in C++ identifiers.

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