Exception Handling in Object-Oriented Programming: Enhance Program Robustness

Question 1

In Java, which type of exception requires explicit handling by the developer?

Accepted Answer

Checked exception

Answer

Unchecked exception

Answer

System exception

Answer

Custom exception

Question 2

What's the main goal of exception handling in Java?

Accepted Answer

Help programs recover from errors

Answer

Prevent errors from happening

Answer

Make code look better

Answer

Fix all errors automatically

Question 3

Which of the following is a user-defined exception type in Java?

Accepted Answer

CustomException

Answer

CheckedException

Answer

UncheckedException

Answer

RuntimeException

Question 4

What's the main purpose of using exception handling?

Accepted Answer

Handle errors during program execution

Answer

Prevent errors from happening

Answer

Make programs run faster

Answer

Reduce the need for testing

Question 5

In Java, how do you define a custom exception class that extends the Throwable class?

Accepted Answer

public class CustomException extends Throwable

Answer

static class CustomException extends Throwable

Answer

class CustomException extends Error

Answer

class CustomException implements Throwable

Question 6

In Java, what is the correct order of exception classes from most general to most specific?

Accepted Answer

Throwable → Exception → Error

Answer

Error → Exception → Throwable

Answer

Exception → Throwable → Error

Answer

Error → Throwable → Exception

Question 7

Which of the following is a potential drawback of using exception handling in software development?

Accepted Answer

It can make code more complex.

Answer

It can prevent all program crashes.

Answer

It can replace the need for thorough testing.

Answer

It can always identify the root cause of an error.

Question 8

Which of the following is NOT an advantage of exception handling in object-oriented programming?

Accepted Answer

Improved performance

Answer

Improved code readability

Answer

Reduced code complexity

Answer

Increased code reliability

Question 9

Which of the following is a **disadvantage** of exception handling in object-oriented programming?

Accepted Answer

Increased code complexity

Answer

Improved code readability

Answer

Enhanced program robustness

Answer

Reduced development time

Question 10

In Java, which class serves as the foundation for all exceptions?

Accepted Answer

Throwable

Answer

Exception

Answer

Error

Answer

RuntimeException

Question 11

What is a key advantage of using exception handling in software development?

Accepted Answer

Prevents unexpected program termination

Answer

Increases program execution speed

Answer

Reduces the need for testing

Question 12

In Java, how do you raise an exception?

Accepted Answer

Use the throw keyword followed by an instance of the Exception class.

Answer

Create an instance of the Exception class.

Answer

Return an instance of the Exception class from a method.

Answer

Print the stack trace of the Exception class.

Question 13

What is the primary advantage of utilizing exception handling in software development?

Accepted Answer

Facilitates error management and recovery

Answer

Enhances code reusability

Answer

Simplifies code structure

Question 14

What is the primary goal of exception handling in object-oriented programming?

Accepted Answer

Identifying and recovering from errors during program execution

Answer

Enhancing program performance

Answer

Simplifying the coding process

Answer

Providing debugging information

Question 15

What is a key benefit of using exception handling in software development?

Accepted Answer

Graceful error handling

Answer

Improved code readability

Answer

Increased program speed

Question 16

In Java, which exception handling approach enhances program clarity and effective error management?

Accepted Answer

Utilizing specific exception classes to handle only the relevant exceptions in the current context

Answer

Declaring generic exception classes to handle all possible exceptions

Answer

Ignoring exceptions and assuming they won't occur during program execution

Question 17

Which of the following is a potential drawback of using exception handling in object-oriented programming?

Accepted Answer

Increased code complexity

Answer

Improved code readability

Answer

Increased program robustness

Answer

Easier debugging

Question 18

Which of the following is NOT an advantage of exception handling in object-oriented programming?

Accepted Answer

Increased program performance

Answer

Improved program reliability

Answer

Enhanced program maintainability

Answer

Simplified debugging process

Question 19

Which of the following is **not** an advantage of exception handling in Java?

Accepted Answer

Increased program performance

Answer

Improved program robustness

Answer

Simplified error handling

Answer

Enhanced code maintainability

Question 20

How does exception handling enhance programming?

Accepted Answer

Improves program robustness and reliability

Answer

Increases code complexity

Question 21

When a method cannot be executed due to an invalid input parameter, which exception type is most suitable?

Accepted Answer

IllegalArgumentException

Answer

Error

Answer

IOException

Question 22

During testing and debugging, which exception handling principle is crucial for ensuring optimal program behavior?

Accepted Answer

Handle only relevant exceptions within the current code block.

Accepted Answer

Provide clear error messages to identify the exception's root cause.

Answer

Use the Exception class to handle all exceptions.

Answer

Avoid handling exceptions to allow the program to terminate abruptly.

Question 23

In Java, what is the primary purpose of the `finally` block within a try-catch block?

Accepted Answer

To execute essential program cleanup code, regardless of whether an exception occurs.

Answer

To handle exceptions that are not caught by any preceding catch blocks.

Answer

To provide an alternative execution path when an exception is thrown.

Answer

To define the exception that will be thrown by the try block.

Question 24

In Java, what's the key difference between using the `try-with-resource` statement and traditional try-catch blocks for handling resources?

Accepted Answer

The `try-with-resource` statement automatically closes resources, while try-catch blocks require manual closing.

Answer

Traditional try-catch blocks handle checked exceptions, while `try-with-resource` handles unchecked exceptions.

Answer

The `try-with-resource` statement can only be used with specific resources, unlike try-catch blocks.

Answer

The `try-with-resource` statement is much faster than try-catch blocks.

Question 25

How does exception handling enhance the robustness and reliability of Java programs? Explain the key benefits it offers for error management and code quality.

Accepted Answer

Exception handling ensures graceful error handling, preventing abrupt program termination.

Accepted Answer

Exception handling enables efficient error logging and monitoring, facilitating issue identification and resolution.

Accepted Answer

Exception handling improves code readability and maintainability by separating error handling logic from the main program flow.

Answer

Exception handling introduces unnecessary overhead and performance penalties.

Question 26

Which practice is considered poor in exception handling?

Accepted Answer

Catching all exceptions in a single catch block

Answer

Using specific exception types for each potential error

Answer

Providing informative error messages in exception handlers

Answer

Logging exceptions for debugging

Question 27

What is the fundamental distinction between checked and unchecked exceptions?

Accepted Answer

Checked exceptions require explicit handling in code, while unchecked exceptions do not.

Answer

Checked exceptions are thrown by the JVM, while unchecked exceptions are user-defined.

Answer

Unchecked exceptions are thrown by the JVM, while checked exceptions are user-defined.

Answer

Checked exceptions do not require explicit handling in code, while unchecked exceptions do.

Question 28

When is it appropriate to throw a custom exception?

Accepted Answer

To indicate an error condition specific to your program

Answer

To handle exceptions gracefully

Answer

To log exceptions to the console

Answer

To prevent the program from crashing

Question 29

What is the difference between `throw` and `throws` in Java?

Accepted Answer

`throw` throws an exception, while `throws` declares that a method may throw an exception

Answer

`throws` throws an exception, while `throw` declares that a method may throw an exception

Answer

There is no difference between `throw` and `throws`

Answer

`throw` declares that a method may throw an exception, while `throws` throws an exception

Question 30

How does exception propagation contribute to centralized exception handling and improved code maintainability?

Accepted Answer

Exception propagation enables centralized exception handling, allowing for custom exception recovery logic in a designated location.

Answer

Exception propagation hinders code maintainability by allowing exceptions to be handled anywhere in the call stack.

Answer

Exception propagation eliminates the need for try-catch blocks, resulting in more concise code.

Answer

Exception propagation should be avoided to prevent exceptions from disrupting program flow.

Question 31

What happens when an exception remains unhandled in a program?

Accepted Answer

The program abruptly terminates without providing any error information.

Answer

The program proceeds as if no error occurred.

Answer

The program exits gracefully, providing a detailed error report.

Answer

The program enters an infinite loop, repeatedly attempting to handle the exception.

Question 32

Which of the following is NOT an advantage of exception handling in Java programming?

Accepted Answer

Enhanced performance

Answer

Improved code readability

Answer

Increased modularity

Answer

Simplified debugging

Question 33

Which class in Java is the superclass of all exceptions and errors?

Accepted Answer

Throwable

Answer

Exception

Answer

Error

Answer

RuntimeException

Question 34

What is the purpose of the 'finally' block in Java's exception handling?

Accepted Answer

To execute code that should always run, regardless of whether an exception occurs.

Answer

To provide an alternative path of execution if an exception occurs.

Answer

To declare variables that can be used within the try or catch blocks.

Answer

To terminate the program if an exception occurs.

Question 35

Which of the following is a disadvantage of using exception handling in Java?

Accepted Answer

Increased code complexity

Answer

Improved program robustness

Answer

Easier debugging

Answer

Separation of normal and exceptional code

Question 36

What is the difference between a checked and an unchecked exception in Java?

Accepted Answer

Checked exceptions must be explicitly handled or declared as thrown, while unchecked exceptions can be ignored.

Answer

Unchecked exceptions must be explicitly handled or declared as thrown, while checked exceptions can be ignored.

Answer

Checked exceptions are thrown by the JVM, while unchecked exceptions are thrown by user code.

Answer

Unchecked exceptions are thrown by the JVM, while checked exceptions are thrown by user code.

Question 37

Which keyword in Java is used to manually throw an exception?

Accepted Answer

throw

Answer

assert

Answer

raise

Answer

except

Question 38

What is the main advantage of using a try-with-resources statement over a try-catch statement in Java?

Accepted Answer

Resources are automatically closed, preventing resource leaks.

Answer

It can handle both checked and unchecked exceptions.

Answer

It is more efficient in handling exceptions.

Answer

It is easier to write and understand.

Question 39

Which of the following is an example of a good exception message in Java?

Accepted Answer

The input value is invalid.

Answer

An error occurred.

Answer

NullPointerException

Answer

System failure.

Question 40

What is the primary function of a logger in Java's exception handling?

Accepted Answer

To write exception messages to a log file or console.

Answer

To handle exceptions that are thrown by the JVM.

Answer

To suppress the display of exception messages.

Answer

To create custom exception classes.

Question 41

In a Java program that processes user input, which exception should you use to handle invalid input?

Accepted Answer

IllegalArgumentException

Answer

ArithmeticException

Answer

IndexOutOfBoundsException

Answer

NullPointerException

Question 42

When using a global exception handler in Java, it's important to consider its potential drawbacks. Which of the following is a disadvantage of utilizing a global exception handler?

Accepted Answer

Loss of specific error details

Answer

Improved code organization

Answer

Simplified debugging

Answer

Increased performance costs

Question 43

Which of the following is **not** a type of exception handling in Java?

Accepted Answer

Compile-time handling

Answer

Checked exception handling

Answer

Unchecked exception handling

Answer

Runtime exception handling

Question 44

What is the advantage of using a 'finally' block in exception handling?

Accepted Answer

It guarantees that a set of code will always be executed, regardless of whether an exception is thrown.

Answer

It allows for handling multiple exceptions in a single block.

Answer

It helps in debugging by providing more information about the exception.

Question 45

What is the primary distinction between a checked and an unchecked exception?

Accepted Answer

Checked exceptions must be explicitly handled in the method signature, while unchecked exceptions do not.

Answer

Checked exceptions are always more severe than unchecked exceptions.

Question 46

What is the purpose of a 'throws' clause in a method signature in Java?

Accepted Answer

To declare the checked exceptions that the method may throw

Answer

To handle exceptions that are thrown by called methods

Answer

To declare the unchecked exceptions that the method may throw

Question 47

What is the purpose of the 'finally' block in exception handling?

Accepted Answer

To clean up resources and execute code regardless of whether an exception occurred.

Answer

To declare the type of exception that the method can throw.

Answer

To catch exceptions that are not handled by other catch blocks.

Question 48

Which exception is thrown when attempting to access an array element outside its valid indices?

Accepted Answer

ArrayIndexOutOfBoundsException

Answer

IllegalArgumentException

Answer

IndexOutOfBoundsException

Answer

ClassCastException

Question 49

What is the main difference between 'throw' and 'throws' keywords?

Accepted Answer

Throw is used to raise an exception immediately, while throws declares the exceptions that a method might throw.

Answer

Throw is used to handle exceptions, while throws declares the exceptions that a method will handle.

Question 50

When defining your own exception classes, it is a best practice to:

Accepted Answer

Inherit from the Exception class and provide a clear error message in the constructor.

Answer

Inherit from the RuntimeException class and provide a generic error message in the constructor.

Answer

Do not inherit from any base exception class and always use generic error messages.

Question 51

What is the primary purpose of the 'try-with-resources' statement?

Accepted Answer

To declare and automatically close resources.

Answer

To suppress exceptions that are not handled.

Answer

To handle multiple exceptions in a single statement.

Answer

To create a block of code that is guaranteed to execute.

Question 52

Which of the following is a potential drawback of using exception handling?

Accepted Answer

Performance overhead due to additional exception handling code.

Answer

Improved code organization and maintainability.

Answer

More robust and reliable programs.

Question 53

What is the primary use of the 'suppressedExceptions' property of an exception in Java?

Accepted Answer

To store a list of exceptions that occurred as a result of the main exception.

Answer

To store the message associated with the exception.

Answer

To provide a stack trace of the exception.

Question 54

Which of the following is a best practice for designing exception messages?

Accepted Answer

Keep them concise, specific, and actionable.

Answer

Use technical jargon and exception codes to convey the error.

Answer

Provide lengthy and detailed stack traces in the message.

Answer

Use generic phrases like 'An error occurred' or 'Something went wrong'.

Question 55

Which of the following is the superclass of all exceptions in Java?

Accepted Answer

Throwable

Answer

Error

Answer

Exception

Answer

RuntimeException

Question 56

What is the primary purpose of a 'try-catch' block?

Accepted Answer

To handle specific exceptions gracefully and provide alternative execution paths.

Answer

To prevent exceptions from occurring.

Answer

To recover automatically from all exceptions.

Question 57

Which of the following statements correctly demonstrates how to throw a 'NullPointerException'?

Accepted Answer

String str = null; str.length();

Answer

String str = "Hello"; str.charAt(-1);

Answer

int[] arr = new int[5]; arr[5] = 10;

Answer

try { throw new NullPointerException(); } catch (Exception e) {}

Question 58

What is the key difference between 'checked' and 'unchecked' exceptions?

Accepted Answer

Checked exceptions must be handled or declared in the method signature, while unchecked exceptions can be propagated without being handled.

Answer

Checked exceptions are thrown by the JVM, while unchecked exceptions are thrown by code.

Answer

Checked exceptions are more severe than unchecked exceptions.

Question 59

What is the main benefit of using multiple 'catch' blocks?

Accepted Answer

To handle different types of exceptions separately and provide specific responses.

Answer

To reduce the number of 'try' blocks required.

Answer

To prevent exceptions from being propagated.

Question 60

Which of the following is considered a best practice for exception handling?

Accepted Answer

Use specific exception types and provide meaningful error messages.

Answer

Handle all exceptions in a single 'catch' block.

Answer

Suppress exceptions using 'try-catch' blocks without handling them.

Question 61

What is the role of the 'Exception' class in the Java exception hierarchy?

Accepted Answer

It serves as the base class for all other exceptions.

Answer

It provides methods for creating custom exceptions.

Answer

It is used primarily for debugging purposes.

Answer

It handles all types of exceptions.

Question 62

Which of the following is an example of defining a custom exception?

Accepted Answer

class MyException extends Exception { ... }

Answer

throw new NullPointerException();

Answer

String str = null; str.length();

Answer

try { ... } catch (Exception e) { ... }

Question 63

What is the purpose of the 'finally' block in exception handling?

Accepted Answer

Always executes, regardless of whether an exception occurs

Answer

Determines the type of exception that will be thrown

Answer

Specifies the action to be taken when an exception is caught

Question 64

Which exception class is the superclass of all exceptions in Java?

Accepted Answer

Throwable

Answer

Error

Answer

Exception