10 Questions
What is the primary purpose of a Data Access Layer (DAL) in software development?
To provide a standardized and centralized way to access and manipulate data in a database.
What is the main advantage of using a Data Access Object (DAO) interface?
It provides a layer of abstraction between the business logic and the data access logic, making it easier to switch between different databases or data access technologies.
What is the purpose of using prepared statements in CRUD (Create, Read, Update, Delete) operations?
To improve security by preventing SQL injection attacks and to improve performance by reducing the overhead of dynamically generated SQL statements.
What is the benefit of using threads in a Java program?
To allow for concurrent execution of tasks, improving the responsiveness and throughput of the program.
What is the purpose of an Executor in Java?
To manage a pool of threads and execute tasks asynchronously, improving the performance and scalability of the program.
How does a Data Access Object (DAO) interface facilitate the interaction between the business logic and the data storage?
A DAO interface acts as an abstraction layer, encapsulating the data access logic and providing a standardized interface for the business logic to interact with the data storage.
What is the benefit of using a thread pool instead of creating a new thread for each task?
Using a thread pool reduces the overhead of creating and destroying threads, improves system resource utilization, and enhances scalability.
How does a prepared statement improve the security of a CRUD operation?
A prepared statement helps prevent SQL injection attacks by separating the SQL code from the data, ensuring that the SQL code is not modified by the input data.
What is the purpose of iterating through a ResultSet to populate a Collection of Objects?
Iterating through a ResultSet to populate a Collection of Objects enables the retrieval of data from a database and its conversion into a format usable by the application.
What is the role of a blocking IO method in a client-server connection, and provide an example?
A blocking IO method causes the program to wait until the input/output operation is complete, ensuring that the program does not proceed until the necessary data is available.
Test your understanding of Java concepts, including Data Access Layers, Data Access Objects, and multithreading. Learn to write prepared statements, iterate through ResultSets, and deploy Runnables in multiple threads for concurrent task execution.
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