Question
Define an exception and analyse the primary systemic and logical causes behind exception
generation. How are exceptions handled in Java? Design a custom, user-defined exception class to
validate human age inputs (e.g., throwing an exception if the input is negative or exceeds a realistic
biological threshold)
Answer :
Word Count : 641
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Skip in 10
An exception is an abnormal condition or unexpected event that occurs during the execution of a program and disrupts the normal flow of instructions. In Object-Oriented Programming using Java, an exception represents an error or unusual situation that can be detected and handled by the program itself. Exceptions are objects in Java that are created from classes derived from the `Throwable` class. They provide a structured mechanism for identifying, reporting, and managing runtime problems without causing sudden program termination. Exception generation in Java occurs due to various systemic and logical causes. Systemic causes are related to the environment, hardware, or external resources on which a program depends. One common systemic cause is insufficient memory, which may result in an `OutOfMemoryError` when the Java Virtual Machine cannot allocate additional memory. Hardware failures, unavailable files, network problems, or database connection failures can also generate exceptions. For example, attempting to access a file that does not exist may produce a `FileNotFoundException`. Similarly, communication failures with external systems can lead to input-output exceptions. Logical causes arise due to mistakes or incorrect assumptions made while designing or coding a program. Common logical causes include dividing a number by zero, accessing an invalid array index, using an object reference that has not been initialized, and converting data into an incompatible format. For example, if a program tries to access the fifth element of an array containing only three elements, an `ArrayIndexOutOfBoundsException` occurs. These errors are usually caused by improper validation,
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