Select the correct answerWhich of these can not be used for a variable name in Java?Optionskeywordidentifieridentifier & keywordnone of the mentioned
Question
Select the correct answer
What of these can not be used for a variable name in Java?
Options:
- keyword
- identifier
- identifier & keyword
- none of the mentioned
Solution
Break Down the Problem
- Identify the Options: Understand what each option represents in the context of variable naming rules in Java.
- Review Java Variable Naming Rules: Look into the rules that govern naming variables in Java.
Relevant Concepts
- Keywords: Reserved words in Java that have special meaning (e.g.,
class
,public
,static
). - Identifiers: Names given to variables, methods, classes, etc., which must follow specific naming conventions.
Analysis and Detail
- Keywords: Cannot be used as variable names in Java, as they are reserved for specific programming constructs.
- Identifiers: Allowed to be used for variable names as they are user-defined and must adhere to certain rules (e.g., starting with a letter, no spaces, etc.).
Verification
- Identifiers & Keywords: The phrase "identifier & keyword" suggests a combination, but in terms of naming rules, they cannot overlap since keywords are strictly prohibitive as variable names.
Final Answer
The correct answer is keyword. A keyword cannot be used for a variable name in Java.
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