When designing a system for reporting purposes, what techniques would you use to ensure minimal impact on the transactional database system?
- Caching, Denormalization, Stored Procedures, Asynchronous Processing
- Data Warehousing, Materialized Views, Scheduled ETL Processes, Read-Only Replicas
- Indexing, Query Optimization, Database Partitioning, Load Balancing
- Vertical Scaling, Horizontal Scaling, Compression, Normalization
Techniques like data warehousing, materialized views, scheduled ETL processes, and read-only replicas can help ensure minimal impact on the transactional database system in a reporting system.
What enables servlets to handle requests asynchronously?
- Asynchronous Servlets
- Event Listeners
- RequestDispatcher
- Servlet Containers
Servlets handle requests asynchronously through the use of Asynchronous Servlets, allowing them to perform tasks concurrently without blocking the processing of other requests.
How is an asynchronous task started in a servlet?
- asyncTask.start()
- beginAsync()
- initAsync()
- startAsync()
An asynchronous task in a servlet is started using the startAsync() method. This method initiates asynchronous processing and returns an AsyncContext for managing the asynchronous task.
How is a servlet configured in a web application?
The tag is used to define a servlet in the web.xml file. The element specifies the fully qualified name of the servlet class, providing the configuration necessary for the servlet container to manage the servlet.
Which interface must be implemented by a servlet for asynchronous processing?
- AsyncListener
- AsyncProcessor
- Asynchronous
- Callable
A servlet must implement the Async interface to support asynchronous processing. This interface provides methods for starting and completing asynchronous tasks.
What is the purpose of the AsyncContext in asynchronous servlets?
- To manage asynchronous operations
- To manage request attributes
- To manage servlet configuration
- To manage session attributes
The purpose of the AsyncContext in asynchronous servlets is to manage asynchronous operations, providing methods for starting and completing asynchronous tasks.
How does asynchronous processing affect the servlet's lifecycle?
- Extends the servlet lifecycle
- No impact on the servlet lifecycle
- Pauses the servlet lifecycle
- Shortens the servlet lifecycle
Asynchronous processing can extend the servlet lifecycle, as it allows tasks to continue beyond the usual request-response cycle, providing more flexibility in handling long-running operations.
The method __________ is called to start asynchronous processing in a servlet.
- asynchronous()
- beginAsync()
- initAsync()
- startAsync()
The startAsync() method is called to initiate asynchronous processing in a servlet.
The __________ method of AsyncContext is used to dispatch the request to another servlet.
- dispatch()
- forward()
- include()
- sendRedirect()
The dispatch() method of AsyncContext is used to dispatch the request to another servlet during asynchronous processing.
What is the primary use of RequestDispatcher in servlets?
- Forwarding requests
- Initializing servlets
- Processing GET requests
- Sending redirect responses
The primary use of RequestDispatcher in servlets is for forwarding requests to another resource (servlet, JSP, or HTML) on the server.