Multiple choice technology programming languages

Which statement is/are correct ?

  1. You can not use C# keywords as the Identifiers

  2. abstract is a valid identifier .

  3. _Identifier and \u006fIdentifier are identical

  4. Identifiers can also contain unicode characters.

Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

In C#, you cannot use keywords as identifiers unless they are prefixed with '@'. Identifiers can also contain Unicode characters, making both statements correct.