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.
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.
Which of these is not a type of memory area in the Java Virtual Machine (JVM)?
- Cache
- Heap
- Registers
- Stack
Cache is not a type of memory area in the Java Virtual Machine (JVM). The primary memory areas in JVM include Heap, Stack, and Registers.
Using _________ instead of concatenation in loops for string manipulation enhances performance in servlets.
- CharArray
- String
- StringBuffer
- StringBuilder
Using StringBuilder instead of concatenation in loops for string manipulation enhances performance in servlets because StringBuilder is more efficient in handling string concatenation operations.
In high-performance servlets, _________ pattern can be used to manage resource-intensive objects.
- Command
- Flyweight
- Observer
- Singleton
In high-performance servlets, the Flyweight pattern can be used to manage resource-intensive objects efficiently by sharing common parts of state among multiple objects.
For optimal servlet performance, session data should be kept to a minimum, utilizing ________ for state management.
- Cookies
- Hidden Fields
- Session Tracking
- URL Rewriting
For optimal servlet performance, session data should be kept to a minimum, utilizing Session Tracking for state management.
To improve scalability, servlets can delegate database reads to ________ instances.
- Observer
- Singleton
- Stateful
- Stateless
To improve scalability, servlets can delegate database reads to Stateless instances, as they do not maintain client-specific state between method calls.
A servlet handling massive data queries is experiencing performance issues. What optimization technique should be prioritized?
- Caching results
- Increasing server hardware
- Minifying CSS and JavaScript files
- Optimizing database queries
Optimizing database queries would be a key strategy in this scenario, as it directly addresses the performance issues associated with handling massive data queries.