Practice Handling Exceptions And Closing Resources (19.9) - Database Connectivity (e.g., JDBC)

Practice: Handling Exceptions and Closing Resources

Lesson 19.9Database Connectivity (e.g., JDBC)

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10 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the purpose of closing JDBC resources?
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Think about what happens if resources aren't closed.
Question 2.
What does SQLException indicate?
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Relate this to interactions with databases.
3Question 3.
What is the recommended way to manage resources in JDBC?
- Using manual close statements
- Try-with-resources
- Ignoring resource closure
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Consider which method simplifies coding.
4Question 4.
True or False: It is safe to ignore closing JDBC resources.
- True
- False
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Think about the consequences of leaving resources open.
Question 5.
Implement JDBC code with resource management that connects to a MySQL database and executes a query using try-with-resources while handling SQLEdception.
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Don't forget to include the SQL statements and handle the connection properly.
Question 6.
Discuss how an unclosed Statement might affect the performance of a Java application in a multi-user environment.
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Consider what happens to system resources when they're not being freed up.

6 more questions in this section. Enroll free to practise them all.