Advanced Java Programming · Unit 4 · 4 hrs
Database Connectivity
Exam-focused notes for Database Connectivity (Advanced Java Programming, CSC419): what the TU syllabus asks and how it has actually been tested, with 9 solved past questions from this unit.
What this unit covers
- JDBC Architecture, JDBC Driver Types, JDBC Configuration, Managing Connections, Statements, Result Set, SQL Exceptions
- DDL and DML Operations using Java, Prepared Statements, Multiple Results, Scrollable Result Sets, Updateable Result Sets, Row Sets and Cached Row Sets, Transactions, SQL Escapes
DDL and DML Operations using Java, Prepared Statements, Multiple Results, Scrollable Result Sets, Updateable Result Sets, Row Sets and Cached Row Sets, Transactions, SQL Escapes
What do you mean by SQL escape? Describe about scrollable and updateable result sets. [5]
--- SQL Escape (also called SQL escape syntax) is a standard JDBC mechanism that allows Java programs to use database-independent SQL syntax for features that differ across database vendors (such as date literals, stored procedure calls, outer joins, scalar...
Full solved answer →Assume a table MOVIE(id, title, genre). Now, using JDBC, perform the following queries; a. Add any three records to the MOVIE table. b. Using a prepared statement, update the genre to 'Comedy' having the title 'Jatra'. [5]
--- --- Step Method Used Purpose ---------------------------- Load driver Class.forName() Registers MySQL JDBC driver Connect DriverManager.getConnection() Opens DB connection Insert records stmt.executeUpdate() Returns number of rows affected Prepared stat...
Full solved answer →What is row set? Explain cached row set in detail. [5]
A RowSet is a Java interface that extends the ResultSet interface and provides a more flexible and convenient way to handle tabular data from a database. It is part of the javax.sql package. - It is a JavaBean component, meaning it supports event handling, ...
Full solved answer →You are hired by a reputed software company which is going to design an application for 'Movie Rental System'. Your responsibility is to design a schema named MRS and create a table named Movie(id, Title, Genre, Language, Length). Write a program to design a GUI form to take input for this table and insert the data into table after clicking the OK button.[10]
--- Note: Java AWT (Abstract Windowing Toolkit) is used to develop GUI/window-based applications. JDBC interfaces such as Connection, Statement, and ResultSet are used to communicate with the database. A Type 4 (Pure Java) JDBC driver is used here as it dir...
Full solved answer →What are the benefits of using JDBC? What is prepared statement? [5]
--- JDBC (Java Database Connectivity) is a Java API that enables Java applications to interact with databases. The key benefits are: 1. Platform Independence / Cross-Platform: JDBC is cross-platform, meaning Java applications using JDBC can run on any opera...
Full solved answer →How prepared statements are different with statement? List the types of JDBC driver. [5]
--- Feature Statement PreparedStatement --------- Definition Used to execute simple, static SQL queries Used to execute precompiled, parameterized SQL queries SQL Compilation SQL is compiled every time it is executed SQL is compiled only once and reused Par...
Full solved answer →JDBC Architecture, JDBC Driver Types, JDBC Configuration, Managing Connections, Statements, Result Set, SQL Exceptions
Describe the role of Result Sets. What is wrong in the following code?
public class Point {
int p;
public void setP(int p) {
p = p;
}
}
[5]
--- A Result Set in Java (specifically java.sql.ResultSet) represents the result of a database query. It acts as a cursor that points to the data returned from executing a SQL SELECT statement via JDBC. Role Description ------------------- Data Retrieval Ho...
Full solved answer →Explain JDBC driver types. What is scrollable result set? [5]
There are 4 types of JDBC drivers: --- - To use a Type 1 driver, an ODBC driver must be installed and configured on the client machine. - This driver does not directly interact with the database. - It converts JDBC method calls into ODBC method calls, which...
Full solved answer →Write short notes on: a. JDBC drivers b. Java server pages [2.5+2.5]
--- JDBC (Java Database Connectivity) provides a standard API for Java applications to interact with databases. A JDBC driver is a software component that enables Java applications to communicate with a database by translating JDBC method calls into databas...
Full solved answer →Make Unit 4 stick
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