When a thread acquires a lock for a synchronized method, it ________ the entry of other threads for all synchronized methods.
- blocks
- ignores
- permits
- suspends
When a thread acquires a lock for a synchronized method, it blocks the entry of other threads for all synchronized methods in the same object or class. This means that while one thread is inside a synchronized method, other threads attempting to enter any synchronized method of the same object or class will be blocked until the lock is released by the executing thread. This ensures exclusive access to synchronized methods, preventing data corruption in multi-threaded scenarios.
Which method should be used to release the resources held by a Statement object immediately?
- close()
- execute()
- finalize()
- release()
In JDBC, the close() method should be used to release the resources held by a Statement object immediately. This method should be called when you're done using a Statement to free up resources, like database connections and memory. The other options do not serve this purpose.
Which of the following classes are byte stream classes in Java?
- FileInputStream and FileOutputStream
- FileInputStream and Reader
- FileReader and FileOutputStream
- FileReader and Writer
Byte stream classes in Java are used for handling binary data. The correct options are FileInputStream and FileOutputStream, as they are used to read and write binary data to files. FileReader and Reader are character stream classes used for reading text data, not binary data.
What is the difference between an abstract class and an interface when Java 8 introduced default methods in interfaces?
- An abstract class can contain both abstract and concrete methods, whereas an interface can only have abstract methods.
- An abstract class cannot be extended, but an interface can be implemented.
- An abstract class cannot have any methods with default implementations, while an interface can have default methods.
- An abstract class cannot have constructors, but an interface can have default constructors.
In Java 8, interfaces were enhanced to support default methods, which provide a default implementation. The key difference between an abstract class and an interface is that an abstract class can have both abstract and concrete methods, whereas an interface can only have abstract methods. This allows for multiple inheritance of behavior through interfaces while maintaining the ability to inherit state through abstract classes.
Which sorting algorithm repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order?
- Bubble Sort
- Insertion Sort
- Merge Sort
- Quick Sort
Bubble Sort is a simple sorting algorithm that repeatedly steps through the list to be sorted, compares adjacent elements, and swaps them if they are in the wrong order. It is known for its simplicity but is less efficient than other sorting algorithms like Quick Sort and Merge Sort in terms of time complexity.
How does route summarization affect the size of the routing table in a network?
- Decreases the size by removing unnecessary routes
- Has no impact on the size of the routing table
- Increases the size by adding more specific routes
- Reduces the size by aggregating multiple routes into a single summary route
Route summarization reduces the size of the routing table by aggregating multiple routes into a single summary route, which helps in efficient routing table management.
For automated network deployment and testing, the use of _______ tools can significantly reduce manual intervention and human errors.
- Monitoring
- Orchestration
- Configuration Management
- DevOps
The use of configuration management tools can significantly reduce manual intervention and human errors in automated network deployment and testing.
In a network using VLSM, how is the subnet size determined for different network segments?
- Subnet size is determined by the geographical location of each segment
- Subnet size is determined by the number of hosts in each segment
- Subnet size is determined by the specific requirements of each segment
- Subnet size is fixed and the same for all segments
In VLSM, the subnet size is determined based on the specific requirements of each network segment, allowing for flexibility in addressing.
The encapsulation of various network layer protocols within IP is a fundamental feature of _______ tunnels.
- PPTP
- L2TP
- GRE
- SSL/TLS
The encapsulation of various network layer protocols within IP is a fundamental feature of GRE tunnels.
What type of cabling is recommended for a network that requires a bandwidth of up to 10 Gbps over a distance of 100 meters?
- Coaxial
- Ethernet
- Fiber Optic
- Twisted Pair
Twisted pair cabling, especially Cat6 or Cat6a, is recommended for a network that requires a bandwidth of up to 10 Gbps over a distance of 100 meters.