?– The exception class defines mild error conditions that your program encounters. Exceptions can occur when trying to open the file, which does not exist, the network connection is disrupted, operands being manipulated are out of prescribed ranges, the class file you are interested in loading is missing. The error class defines serious error conditions that you should not attempt to recover from. In most cases it is advisable to let the program terminate when such an error is encountered.

The garbage collector invokes an object’s finalize() method when it detects that the object has become unreachable. In Java, the finalize() method is a method of the Object class, and it is called by the garbage collector before an object is reclaimed (garbage collected). However, there are no guarantees about when the finalize() method will be called or whether it will be called at all. The Java documentation explicitly states that it is typically not recommended to rely on finalize() for resource…

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Thread class and Runnable interface can be used to create threads and using Runnable interface is the most advantageous method to create threads because we need not extend thread class here. In Core Java, the primary classes and interfaces used to create threads are: Thread class: The Thread class itself is used to create and manage threads. You can extend the Thread class and override its run() method to define the code that will be executed by the thread. Example:…

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An I/O filter is an object that reads from one stream and writes to another, usually altering the data in some way as it is passed from one stream to another. In the context of Core Java, an I/O filter typically refers to an object that is used to perform filtering on data as it is read from or written to a stream. Input/Output (I/O) streams in Java are used for reading from or writing to various sources, such as…

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No, it is not the main method in which you define variables. Global variables is not possible because concept of encapsulation is eliminated here. In Java, the concept of global variables, as traditionally understood in some other programming languages like C, doesn’t directly apply. In Java, variables are typically declared within a class, method, or block, and their scope is limited to that particular context. However, if you want to create variables that can be accessed globally across different parts…

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No abstract class cannot be instantiated i.e you cannot create a new object of this class No, an abstract class cannot be instantiated in Java. An abstract class is a class that is declared with the abstract keyword. It may have abstract methods (methods without a body) that must be implemented by its subclasses. Abstract classes cannot be instantiated on their own because they may contain incomplete or abstract methods, and it doesn’t make sense to create objects of an…

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: A class can have a block of initializer code that is simply surrounded by curly braces and labeled as static e.g. Code: public class Demo{ static int =10; static{ System.out.println(�Hello world�); } } And this code is executed exactly once at the time of class load In Java, a static initializer block is a block of code within a class that is executed only once when the class is loaded into the Java Virtual Machine (JVM). It is used…

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?– Every computer connected to a network has an IP address. An IP address is a number that uniquely identifies each computer on the Net. An IP address is a 32-bit number. In Java, InetAddress is a class that represents an Internet Protocol (IP) address. It is part of the java.net package and provides methods for working with IP addresses. The InetAddress class can be used to create instances representing both IPv4 and IPv6 addresses. Here’s a brief overview of…

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