Podcast
Questions and Answers
What is the purpose of JDBC in Java?
What is the purpose of JDBC in Java?
Which statement accurately describes the components of JDBC?
Which statement accurately describes the components of JDBC?
In which packages are JDBC classes defined?
In which packages are JDBC classes defined?
What is the correct sequence to create a database connection using JDBC?
What is the correct sequence to create a database connection using JDBC?
Signup and view all the answers
Which method is used to perform DML statements in JDBC?
Which method is used to perform DML statements in JDBC?
Signup and view all the answers
How many transaction isolation levels are provided by the JDBC through the Connection interface?
How many transaction isolation levels are provided by the JDBC through the Connection interface?
Signup and view all the answers
Which method in JDBC API is static and synchronized?
Which method in JDBC API is static and synchronized?
Signup and view all the answers
What methods are required to load a database driver in JDBC?
What methods are required to load a database driver in JDBC?
Signup and view all the answers
Parameterized queries can be executed by?
Parameterized queries can be executed by?
Signup and view all the answers
What does setAutoCommit(false) do in JDBC?
What does setAutoCommit(false) do in JDBC?
Signup and view all the answers
Study Notes
JDBC Overview
- JDBC (Java Database Connectivity) allows Java programs to interact with a wide range of databases and perform various database operations.
JDBC Components
- JDBC architecture consists of two components: JDBC API (Application Programming Interface) and JDBC Driver.
JDBC Packages
- JDBC classes are defined in two packages: java.sql and javax.sql.
Database Connection Sequence
- To create a database connection using JDBC, the correct sequence is:
- Load the JDBC driver
- Establish a connection with the database
- Create a Statement object
- Execute a query using the Statement object
- Process the results
- Close the resources
DML Statements
- The executeUpdate() method is used to perform DML (Data Manipulation Language) statements in JDBC.
Transaction Isolation Levels
- JDBC provides five transaction isolation levels through the Connection interface: READ_UNCOMMITTED, READ_COMMITTED, REPEATABLE_READ, SERIALIZABLE, and NONE.
Static and Synchronized Method
- The DriverManager class has a static and synchronized method called registerDriver().
Loading a Database Driver
- To load a database driver in JDBC, the following methods are required:
- Call Class.forName() to load the driver class
- Call DriverManager.getConnected() to establish a connection with the database
Parameterized Queries
- PreparedStatements can execute parameterized queries.
Commit and Rollback
- setAutoCommit(false) disables the auto-commit mode, allowing multiple statements to be executed together as a single transaction.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of Java Database Connectivity (JDBC) with this set of multiple-choice questions. Whether you are preparing for a Java interview or a competitive exam, these questions will help you assess your understanding of JDBC concepts and operations.
