In JDBC, what represents a single instance of a particular database session? Question 2Select one:a.a threadb.an opened connectionc.a closed connectiond.a pipe

Analyzing the Question

The question is asking about what represents a single instance of a database session in JDBC (Java Database Connectivity).

Evaluating the Options

1. a. a thread - A thread is a unit of execution, but it doesn't represent a database session itself.
2. b. an opened connection - An opened connection in JDBC is specifically used to interact with the database, representing a session.
3. c. a closed connection - A closed connection does not represent an active session; it is disconnected from the database.
4. d. a pipe - A pipe is not relevant in the context of JDBC sessions.

Conclusion

Given the explanations above, the most accurate answer that represents a single instance of a particular database session in JDBC is:

Final Answer: b. an opened connection.