Mapping variables in Informatica are used to store values that can change during the session but remain constant throughout the execution of a mapping. They are defined in the mapping designer and can be used in expressions, filters, and transformations. You typically use them to maintain state information, such as counting records or accumulating totals, which can be referenced in subsequent transformations within the same mapping.
Java Database Connectivity (JDBC) works by providing a standard API that allows Java applications to interact with databases. It uses a driver manager to establish a connection to the database, and then it allows the application to send SQL queries and retrieve results through a set of interfaces and classes. JDBC supports different types of drivers (e.g., JDBC-ODBC bridge, native-API driver, network protocol driver, and thin driver) to communicate with various database systems.
The advantage of using a PreparedStatement is that it helps prevent SQL injection attacks, improves performance by allowing the database to cache the query plan, and makes it easier to execute parameterized queries safely.
The Java skill section on takluu.com is designed for freshers, intermediate developers, and experienced professionals aiming to crack Java-based technical interviews with confidence. Java remains one of the most in-demand programming languages, and mastering it opens the door to countless opportunities in backend development, enterprise solutions, Android apps, and cloud-based platforms.
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Each topic is structured to help you revise quickly and efficiently, with quizzes and mock interviews to assess your understanding. Our content is curated by experts who have worked with Java across different domains and keep the material aligned with current industry trends.
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