Podcast
Questions and Answers
What is the purpose of a try-catch block in Java?
What is the purpose of a try-catch block in Java?
- To improve the performance of the program
- To handle exceptions that may occur during execution (correct)
- To execute code without interruption
- To define variables within its scope
What happens if no catch block matches the type of the thrown exception?
What happens if no catch block matches the type of the thrown exception?
- The exception is automatically handled
- The exception propagates to the next method in the call stack (correct)
- The program continues execution without interruption
- The program terminates immediately
How many catch blocks can be associated with a single try block?
How many catch blocks can be associated with a single try block?
- Only one catch block is allowed
- As many as needed to handle different exception types (correct)
- Only the default catch block is allowed
- Two catch blocks only - one for checked and one for unchecked exceptions
In which order should catch blocks be placed in relation to each other?
In which order should catch blocks be placed in relation to each other?
What will the following line of code output: System.out.println(ex); if ex is an instance of NewException?
What will the following line of code output: System.out.println(ex); if ex is an instance of NewException?
What type of error occurs due to incorrect syntax or violations of Java language rules during the compilation phase?
What type of error occurs due to incorrect syntax or violations of Java language rules during the compilation phase?
Which example is a common runtime error encountered during the execution of a Java program?
Which example is a common runtime error encountered during the execution of a Java program?
How are logical errors typically identified and fixed in a Java program?
How are logical errors typically identified and fixed in a Java program?
What happens when a runtime error occurs and is not handled in a Java program?
What happens when a runtime error occurs and is not handled in a Java program?
Which of the following statements about compile-time errors is true?
Which of the following statements about compile-time errors is true?
What mechanism allows Java programmers to handle exceptional situations during program execution?
What mechanism allows Java programmers to handle exceptional situations during program execution?
Which error type does NOT cause a program to generate an error message but results in incorrect behavior?
Which error type does NOT cause a program to generate an error message but results in incorrect behavior?
What term is used to describe errors that occur when a program is running, such as trying to divide by zero?
What term is used to describe errors that occur when a program is running, such as trying to divide by zero?
What is the main purpose of using exceptions in a program?
What is the main purpose of using exceptions in a program?
Which type of exception is checked at compile-time by the compiler?
Which type of exception is checked at compile-time by the compiler?
What happens when an unchecked exception occurs in a Java program?
What happens when an unchecked exception occurs in a Java program?
What keyword is used to create a user-defined exception in Java?
What keyword is used to create a user-defined exception in Java?
Which of the following is an example of an unchecked exception?
Which of the following is an example of an unchecked exception?
How are exceptions represented in Java?
How are exceptions represented in Java?
What is a characteristic of built-in exceptions in Java?
What is a characteristic of built-in exceptions in Java?
What must be understood to create a user-defined exception in Java?
What must be understood to create a user-defined exception in Java?
What happens when a 'throw' statement is encountered in a Java program?
What happens when a 'throw' statement is encountered in a Java program?
What type of exception will the catch block handle in the following code segment: 'catch(ArrayIndexOutOfBoundsException e)'?
What type of exception will the catch block handle in the following code segment: 'catch(ArrayIndexOutOfBoundsException e)'?
In the context of exception handling, what does the 'throws' keyword indicate?
In the context of exception handling, what does the 'throws' keyword indicate?
Which of the following statements best describes a typical use case of the 'throw' keyword?
Which of the following statements best describes a typical use case of the 'throw' keyword?
What is the result of running the code segment with 'int a[]=new int;'?
What is the result of running the code segment with 'int a[]=new int;'?
In the context of catch blocks, which exception type is caught by the generic catch block 'catch(Exception e)'?
In the context of catch blocks, which exception type is caught by the generic catch block 'catch(Exception e)'?
What will the output be if an ArithmeticException is thrown in the try block of the MultipleCatchBlock1 class?
What will the output be if an ArithmeticException is thrown in the try block of the MultipleCatchBlock1 class?
Which of the following statements is true regarding multiple catch blocks?
Which of the following statements is true regarding multiple catch blocks?
Study Notes
Types of Errors
- Compile-time errors occur during compilation, caused by syntax errors, like missing semicolons or undefined variables. These prevent the program from compiling.
- Runtime errors occur during program execution, caused by unexpected events like division by zero or accessing an invalid array index. These are handled with exception handling.
- Logical errors result in incorrect program behavior, are hard to detect as they don't cause crashes, and require careful debugging and testing.
Basic Concepts of Exception Handling
- Exception is an event that disrupts the normal flow of a program.
- Throwable is the root class for all exceptions in Java.
- Built-in exceptions are provided by Java libraries.
- Checked exceptions, also known as compile-time exceptions, must be handled by the programmer, usually within a try-catch block, or declared with the 'throws' keyword.
- Unchecked exceptions are not checked during compilation, often caused by user input or runtime errors.
- User-defined exceptions are custom exception classes extending the Exception class. They allow for specific exception handling in cases where the built-in exceptions are insufficient.
Try and Catch Block
- Try-catch block encloses code that may throw an exception.
- Try block contains the potential exception-causing code.
- Catch block handles specific exception types.
- Multiple 'catch' blocks can be used to handle different exception types in order of specificity.
Throw and Throws
- Throw keyword explicitly throws an exception object from within a method.
- Throws keyword indicates that a method might throw an exception of a certain type, requiring the caller to handle it.
- 'throw' is used in the code, while 'throws' is used in method signature.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on the types of errors in Java, including compile-time, runtime, and logical errors. This quiz also covers basic concepts of exception handling, throwable classes, and the differences between checked and unchecked exceptions.
