What type of error is indicated by the code snippet System.outt.println("Hello");?

The code snippet provided contains a typo: "System.outt.println" instead of "System.out.println." This kind of mistake is classified as a syntax error, which occurs when the code deviates from the rules of the programming language. Syntax errors are detected by the compiler or interpreter before the program is run, preventing it from executing altogether.

In this case, the compiler does not recognize "outt" as a valid component of the Java print system, leading to the program failing to compile. Thus, the code snippet will not be executed due to this violation of the language's syntax rules, which underscores the importance of correct spelling and adherence to the structure defined by the programming language.

Other types of errors like run-time errors occur during execution under certain conditions, semantic errors relate to logic but do not necessarily break the syntax, and logic errors lead to incorrect behavior despite the code running without crashes. The presence of a syntax error makes it clear that the program cannot compile until the issue is resolved, affirming the correctness of the answer.