A high-frequency trading application needs to send and receive financial data with minimal latency. What WebSocket features make it suitable for this application?
- Caching and client-side data storage
- Long polling and server-sent events
- Multiplexing and low latency
- Request-response pattern and reliable message delivery
WebSockets, with features like multiplexing and low latency, are suitable for high-frequency trading applications, as they enable efficient, bidirectional communication with minimal delay in data transmission.
What is a common practice to reduce the load on a servlet?
- Caching
- Database Connection Pooling
- Lazy Loading
- Multithreading
Database Connection Pooling is a common practice to reduce the load on a servlet by efficiently managing and reusing database connections, improving performance.
Which of the following is a recommended approach to handle database connections in servlets?
- Closing connections after each request
- Connection pooling
- Opening new connections for each request
- Using a singleton connection
Connection pooling is a recommended approach for handling database connections in servlets, as it optimizes resource usage and enhances performance.
Why is it important to close resources like database connections in servlets?
- All of the above
- To avoid memory leaks
- To conserve memory
- To improve performance
Closing resources like database connections is important to avoid memory leaks and ensure efficient memory usage in servlets.
How does using the PreparedStatement in servlets improve performance?
- PreparedStatements allow for batch processing.
- PreparedStatements are precompiled, reducing SQL parsing overhead.
- PreparedStatements are suitable for handling large datasets.
- PreparedStatements automatically manage database connections.
Using PreparedStatements in servlets improves performance as they are precompiled, reducing SQL parsing overhead, which leads to better execution speed.
How does the sendRedirect() method communicate the new URL to the client's browser?
- Via HTTP headers
- Via HTTP status code
- Via URL parameters
- Via server-side cookies
The sendRedirect() method communicates the new URL to the client's browser by sending an HTTP redirect response with the new URL in the HTTP headers.
What is the benefit of implementing the SingleThreadModel interface in servlets?
- Enhanced concurrent processing.
- Improved thread safety.
- Reduced memory consumption.
- Simplified servlet lifecycle.
Implementing the SingleThreadModel interface in servlets provides improved thread safety by ensuring that only one thread can execute the service method at a time, preventing concurrent access issues.
In HTTP servlets, which method is commonly used for handling form submissions?
- doGet()
- doPost()
- init()
- service()
The doPost() method in HTTP servlets is commonly used for handling form submissions as it is designed for processing data sent in the body of an HTTP POST request.
To minimize server load, servlets can implement _________ to handle asynchronous processing.
- Asynchronous Servlets
- Listeners
- Synchronization
- Threads
To minimize server load, servlets can implement Asynchronous Servlets to handle asynchronous processing and improve the overall scalability of the application.
Which HTTP method is idempotent and used primarily for retrieving data?
- DELETE
- GET
- POST
- PUT
The GET method is idempotent and is used primarily for retrieving data from the server.