CSE2001: Exception Handling and Templates in C++

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Questions and Answers

What is the primary reason why runtime errors are referred to as exceptions?

  • They are always syntax errors
  • They occur during the linking phase of a program
  • They cannot be caught during compilation time (correct)
  • They are caused by user input

What is an example of a compile-time error?

  • Logical error in the program's logic
  • File not found while attempting to read the file in program
  • Incorrect import of library functions and methods (correct)
  • Attempting to divide by zero

What is the main purpose of exception handling in C++?

  • To debug the program
  • To improve program performance
  • To handle runtime errors effectively (correct)
  • To handle syntax errors

What is the term used to describe problems that occur in a program due to an illegal operation performed by the user or by the fault of a programmer?

<p>Errors (D)</p>
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What is the purpose of the throw keyword in C++?

<p>To throw exceptions (A)</p>
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What are the two main types of errors in programming?

<p>Compile-time errors and runtime errors (A)</p>
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What type of data can be thrown as an exception in C++?

<p>Both basic data types and user-defined objects (C)</p>
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What is an example of a runtime error that is an exception in C++?

<p>Attempting to divide by zero (B)</p>
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What is the purpose of the catch block in C++?

<p>To catch and handle exceptions (D)</p>
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In C++, what determines the type of exception to be caught?

<p>The exception declaration in parentheses (C)</p>
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What is the purpose of the try block in C++?

<p>To wrap potentially problematic code (B)</p>
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What is the main purpose of exception handling in C++?

<p>To separate the error handling code from the normal code (D)</p>
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What is the term used to describe the code within a try/catch block?

<p>Protected code (B)</p>
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What is the purpose of the throw statement in exception handling?

<p>To throw an exception from anywhere within a code block (B)</p>
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How many catch statements can be listed in a try/catch block?

<p>Multiple (C)</p>
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What determines the type of exception thrown by the throw statement?

<p>The type of the result of the expression (A)</p>
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What is the benefit of using exception handling in C++?

<p>It allows the program to end gracefully by giving a proper error message (D)</p>
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Study Notes

Exception Handling

  • Errors are problems that occur in a program due to illegal operations performed by the user or programmer, also known as bugs or faults.
  • There are two main types of errors in programming: compile-time errors and run-time errors.
  • Compile-time errors are caught during compilation time, examples include syntax errors, library references, incorrect import of library functions and methods, and uneven bracket pairs.
  • Run-time errors, also known as exceptions, are not caught during compilation time and can cause serious issues if not handled effectively.

Throwing Exceptions

  • An exception is a problem that arises during the execution of a program, such as attempting to divide by zero or encountering a 'file not found' error.
  • In C++, exceptions can be thrown using the throw keyword.
  • Both basic data types and user-defined objects can be thrown as exceptions.

Catching Exceptions

  • The catch block following the try block catches any exception.
  • The type of exception to be caught is specified in parentheses following the catch keyword.
  • Multiple catch statements can be used to catch different types of exceptions.

Try-Catch Block

  • A try-catch block is used to separate error handling code from normal code.
  • The try block contains protected code that might generate an exception.
  • The catch block catches the exception and handles it.

Exception Handling in C++

  • Exception handling in C++ involves using try, catch, and throw keywords to handle exceptions.
  • Exception handling helps to prevent the normal execution of the system from being halted, and instead, ends the program gracefully with a proper error message.

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