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.
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.
Which of the following techniques is effective for reducing response time in servlets?
- Disabling servlet caching.
- Increasing the servlet buffer size.
- Minimizing the use of session objects.
- Using asynchronous processing.
Using asynchronous processing in servlets is effective for reducing response time by allowing the server to handle other tasks while waiting for I/O operations, leading to improved overall system responsiveness.
How does connection pooling in servlets optimize database interactions?
- By caching database query results
- By establishing a new connection for each request
- By increasing the size of the database
- By reusing existing database connections
Connection pooling optimizes database interactions by reusing existing database connections, reducing the overhead of establishing a new connection for each request.