Which of these keywords is used to prevent content of a variable from being modified?Select one:laststaticconstantfinal

Step 1: Break Down the Problem

We need to identify which keyword among the options provided is used to prevent a variable's content from being modified.

Step 2: Relevant Concepts

1. Static: This keyword indicates that a variable is associated with the class rather than instances of the class. It does not prevent modifications.
2. Constant: This is not a keyword in the context of many programming languages but refers to the concept of variables whose values cannot change. However, it is not a recognized keyword in most programming languages.
3. Final: In languages like Java, marking a variable as final means that the variable can be assigned only once, and its value cannot be changed thereafter.

Step 3: Analysis and Detail

• Static does not prevent modification; it only changes how the variable is accessed.
• Constant is more of a concept than a keyword.
• Final explicitly specifies that the variable is unchangeable once initialized.

Step 4: Verify and Summarize

The final keyword effectively prohibits any further modification of the variable's content after its initial assignment.

Final Answer

The correct answer is final.