Exception Handling in Object-Oriented Programming for Biology Majors

Question 1

Which of the following is considered a checked exception?

Accepted Answer

IOException

Answer

ArithmeticException

Answer

IndexOutOfBoundsException

Answer

NullPointerException

Question 2

What is the purpose of the 'throw' keyword in exception handling?

Accepted Answer

To propagate an exception to the caller method

Answer

To create a new exception object

Answer

To terminate the program

Answer

To handle an exception within the current method

Question 3

Which practice is discouraged in exception handling?

Accepted Answer

Handling all possible exceptions

Answer

Using specific exceptions

Answer

Providing descriptive error messages

Answer

Propagating exceptions

Question 4

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

Accepted Answer

Increased program performance

Answer

Improved code readability

Answer

Enhanced error detection

Answer

Reduced debugging time

Question 5

To minimize the need for exception handling, which defensive programming practice is recommended?

Accepted Answer

Validating inputs and data structures

Answer

Ignoring potential error conditions

Answer

Assuming that all function calls will succeed

Answer

Disabling exception propagation

Question 6

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

Accepted Answer

To handle errors and exceptions

Answer

To prevent errors from occurring

Answer

To terminate the program gracefully

Answer

To log errors to a file

Question 7

Which is considered a best practice for exception handling?

Accepted Answer

Using specific catch blocks for different exceptions

Answer

Catching all exceptions in a single catch block

Answer

Ignoring exceptions to improve program performance

Answer

Rethrowing exceptions instead of handling them

Question 8

Explain the key difference between a checked exception and an unchecked exception.

Accepted Answer

Checked exceptions must be handled, while unchecked exceptions can be ignored

Answer

Unchecked exceptions must be handled, while checked exceptions can be ignored

Answer

Checked exceptions indicate programming errors, while unchecked exceptions indicate runtime errors

Answer

Unchecked exceptions indicate programming errors, while checked exceptions indicate runtime errors

Question 9

Describe the benefits of using exception handling specifically in biological computing applications.

Accepted Answer

Improved reliability and robustness

Answer

Reduced program complexity

Answer

Increased code readability

Answer

Faster program execution

Question 10

Which of the following is not an advantage of exception handling?

Accepted Answer

Increased program size

Answer

Early error detection

Answer

Improved program stability

Answer

Reduced debugging time

Question 11

In exception handling, what is the purpose of the try-catch block?

Accepted Answer

To identify and manage exceptions that may arise during code execution

Answer

To prevent any exceptions from being thrown

Answer

To ignore exceptions that occur within the code

Answer

To exclusively handle specific types of exceptions

Question 12

What is the role of the finally block in exception handling?

Accepted Answer

To execute code irrespective of whether an exception occurs

Answer

To capture unhandled runtime exceptions

Answer

To re-throw an exception caught in the catch block

Answer

To prevent the propagation of an exception

Question 13

Which principle is considered best practice for exception handling?

Accepted Answer

Handle only exceptions that are likely to occur

Answer

Handle all possible exceptions in every code block

Answer

Use generic exception classes to catch any type of exception

Answer

Avoid using exception handling altogether

Question 14

Which method is used to explicitly throw an exception?

Accepted Answer

throw

Answer

try

Answer

catch

Answer

finally

Question 15

Which of the following is NOT a key benefit of exception handling in object-oriented programming?

Accepted Answer

Boosted program execution speed

Answer

Improved error management

Answer

Enhanced code stability

Answer

Simplified code readability

Question 16

Which statement accurately describes the 'try' block in exception handling?

Accepted Answer

It encapsulates code that has the potential to generate an exception.

Answer

It manages exceptions that occur within its scope.

Answer

It must be accompanied by a 'catch' block.

Answer

It is mandatory to include a 'finally' block after each 'try' block.

Question 17

What is the primary purpose of the 'throws' keyword in method signatures?

Accepted Answer

It indicates that the method is capable of throwing a particular exception.

Answer

It manages exceptions generated by the method.

Answer

It prevents the method from being invoked if an exception is thrown.

Answer

It is used to trap exceptions that occur within the method body.

Question 18

Which type of exception is thrown when an object is accessed improperly, such as attempting to access an index that exceeds the bounds of an array?

Accepted Answer

ArrayIndexOutOfBoundsException

Answer

NullPointerException

Answer

NumberFormatException

Answer

FileNotFoundException

Question 19

Which practice exemplifies good exception handling?

Accepted Answer

Providing clear and informative error messages to the user

Answer

Employing a generic 'catch' block to manage all exceptions

Answer

Re-throwing exceptions without providing additional context

Answer

Handling only the most probable exceptions

Question 20

What is the primary function of a 'finally' block?

Accepted Answer

It ensures execution of code regardless of whether an exception is thrown.

Answer

It manages exceptions that occur within its scope.

Answer

It can only be used in conjunction with a single 'catch' block.

Answer

It is mandatory to include a 'finally' block after every 'try' block.

Question 21

Which of the following is NOT a valid exception handling structure in Java?

Accepted Answer

catch-try

Answer

try-catch

Answer

try-finally

Answer

try-catch-finally

Question 22

What is the difference between a 'throw' and a 'throws' statement?

Accepted Answer

A 'throw' statement throws an exception, while a 'throws' statement indicates that a method may throw an exception.

Answer

A 'throws' statement throws an exception, while a 'throw' statement indicates that a method may throw an exception.

Answer

There is no difference between a 'throw' and a 'throws' statement.

Answer

A 'throw' statement can only be used within a 'try' block, while a 'throws' statement can be used anywhere in a method.

Question 23

What happens when a Java program encounters an exception that isn't caught or handled?

Accepted Answer

The program stops with an error message.

Answer

The program runs without any issues.

Answer

The exception is automatically sent to the function that called it.

Answer

The program gets stuck in a loop that never ends.

Question 24

Exception chaining is primarily used to:

Accepted Answer

Preserve the original error context

Answer

Improve code readability

Answer

Enhance program performance

Question 25

Which class is the base for all exceptions in Java?

Accepted Answer

Throwable

Answer

Exception

Answer

Error

Answer

RuntimeException

Question 26

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

Accepted Answer

To manage exceptions that may occur during code execution

Answer

To define new exception types

Answer

To terminate program execution in case of an exception

Answer

To prevent exceptions from being thrown

Question 27

What is the distinction between throwing and propagating an exception?

Accepted Answer

Throwing creates a new exception, while propagating re-throws an existing one

Answer

Propagating creates a new exception, while throwing re-throws an existing one

Answer

There is no difference between throwing and propagating an exception

Answer

Throwing is used for synchronous exceptions, while propagating is used for asynchronous exceptions

Question 28

What is a key advantage of using a finally block when handling exceptions?

Accepted Answer

It ensures that cleanup code is executed regardless of whether an exception occurs

Answer

It improves performance by avoiding unnecessary try-catch blocks

Answer

It simplifies exception handling by combining multiple catch blocks

Answer

It allows for custom exception handling based on specific conditions

Question 29

What is the purpose of the Exception.printStackTrace() method?

Accepted Answer

To print the stack trace of an exception to the console

Answer

To create a new exception with a custom message

Answer

To handle an exception without re-throwing it

Answer

To suppress an exception and prevent it from being propagated

Question 30

What is the fundamental difference between checked and unchecked exceptions?

Accepted Answer

Checked exceptions must be explicitly handled, while unchecked exceptions are handled implicitly

Answer

Checked exceptions are more severe than unchecked exceptions

Answer

Unchecked exceptions are subclasses of checked exceptions

Answer

There is no difference between checked and unchecked exceptions

Question 31

Which of the following is NOT a type of exception constructor?

Accepted Answer

Copy constructor

Answer

Default constructor

Answer

Parameterized constructor

Answer

No-argument constructor

Question 32

What is a primary benefit of using custom exceptions?

Accepted Answer

Improved error handling and readability

Answer

Reduced code complexity

Answer

Increased program performance

Answer

Elimination of the need for try-catch blocks

Question 33

Which of the following is NOT an advantage of exception handling?

Accepted Answer

Enhanced application performance and efficiency

Answer

Improved program stability and error management

Answer

Reduced code complexity and maintainability

Answer

Easier error debugging and troubleshooting

Question 34

Which exception class serves as the ultimate superclass for all other exceptions in Java?

Accepted Answer

Throwable

Answer

Exception

Answer

Error

Answer

RuntimeException

Question 35

Identify the correct syntax for declaring a custom exception in Java.

Accepted Answer

public class MyException extends Exception

Answer

public class MyException extends Throwable

Answer

public class MyException implements Exception

Answer

public class MyException throws Exception

Question 36

Which of the following exception types requires explicit handling in the code (checked exception)?

Accepted Answer

FileNotFoundException

Answer

ArithmeticException

Answer

IndexOutOfBoundsException

Answer

RuntimeException

Question 37

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

Accepted Answer

To close resources and perform cleanup actions

Answer

To execute code regardless of whether an exception occurs

Answer

To catch any remaining unhandled exceptions

Answer

To provide an alternative mechanism for handling errors

Question 38

Which of the following approaches represents a best practice for error handling in Java?

Accepted Answer

Utilize specific exception classes to handle specific errors

Answer

Handle all exceptions within a single catch block

Answer

Always rethrow exceptions whenever encountered

Answer

Ignore exceptions and allow the program to terminate abruptly

Question 39

Describe the key advantage of the 'try-with-resources' statement over the traditional 'try-catch' block.

Accepted Answer

It automatically closes resources in the 'finally' block, simplifying resource management.

Answer

It handles only checked exceptions, making code more robust.

Answer

It offers improved performance and efficiency.

Answer

It is incompatible with custom exception classes.

Question 40

Which of the following is an inappropriate technique for handling exceptions in Java?

Accepted Answer

Ignoring exceptions and letting the program terminate without handling them

Answer

Utilizing 'catch' blocks to handle exceptions

Answer

Employing 'try-with-resources' for resource management

Answer

Throwing exceptions using 'throw'

Question 41

What is the primary purpose of the 'printStackTrace()' method?

Accepted Answer

To provide a detailed description of the exception and its stack trace

Answer

To identify the exact line of code where the exception occurred

Answer

To automatically handle and resolve the exception

Answer

To terminate the program execution immediately

Question 42

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

Accepted Answer

MyCustomException

Answer

IOException

Answer

NullPointerException

Answer

ArithmeticException

Question 43

How does inheritance contribute to the exception hierarchy?

Accepted Answer

Subclasses inherit the behavior of their superclass's exceptions, enhancing exception handling capabilities.

Answer

Inheritance forces all subclasses to override their superclass's exceptions, ensuring consistency in exception handling.

Answer

Exceptions are always thrown and caught within the same class, and inheritance does not affect this process.

Question 44

Explain the significance of exception handling in biological computing applications.

Accepted Answer

Exception handling prevents program crashes by allowing developers to anticipate and handle errors.

Answer

Exception handling optimizes program performance by minimizing debugging efforts.

Answer

Exception handling ensures the accuracy of biological data processing.

Question 45

In exception handling, which of these practices is recommended?

Accepted Answer

Using specific exception types

Accepted Answer

Throwing exceptions when appropriate

Accepted Answer

Documenting exceptions clearly

Answer

Handling all exceptions in a single catch block

Question 46

What is the key difference between using 'try-with-resources' and 'try-catch-finally' for exception handling?

Accepted Answer

Try-with-resources automatically closes resources, while try-catch-finally requires manual resource closure.

Answer

Try-catch-finally handles checked exceptions, while try-with-resources handles unchecked exceptions.

Answer

Try-with-resources can only manage one resource at a time.

Question 47

The primary purpose of exception handling is to:

Accepted Answer

Catch and manage errors gracefully

Answer

Prevent errors from occurring

Answer

Ignore errors and continue executing

Answer

Terminate the program immediately upon detecting an error

Question 48

What is the purpose of a try-catch block in Java?

Accepted Answer

To catch and handle exceptions that may occur within the try block

Answer

To prevent exceptions from being thrown

Answer

To terminate the program if an exception occurs within the try block

Answer

To ignore any exceptions that occur within the try block

Question 49

What is the difference between throwing and catching an exception?

Accepted Answer

Throwing an exception indicates an error has occurred, while catching an exception handles the error

Answer

Catching an exception indicates an error has occurred, while throwing an exception handles the error

Answer

Throwing and catching an exception are synonymous

Answer

Throwing an exception prevents an error from occurring, while catching an exception handles the error

Question 50

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

Accepted Answer

Use specific catch blocks to handle different types of exceptions

Answer

Catch all exceptions in a single catch block

Answer

Ignore exceptions whenever possible

Answer

Throw exceptions whenever possible to avoid handling them

Question 51

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

Accepted Answer

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

Answer

To catch and handle exceptions that occur within the try block

Answer

To throw an exception if an error occurs within the try block

Answer

To ignore any exceptions that occur within the try block

Question 52

Which of the following is NOT a benefit of using exception handling?

Accepted Answer

Elimination of all possible errors

Answer

Improved code readability and maintainability

Answer

Increased program robustness and stability

Answer

Reduced likelihood of program crashes

Question 53

Which exception type in Java is commonly used to indicate an invalid operation?

Accepted Answer

IllegalArgumentException

Answer

IOException

Answer

NullPointerException

Answer

IndexOutOfBoundsException