Exception Handling In C Plus Plus — Part 1 MCQs with Explanations

The correct answer is Option D: Using the 'noexcept' specifier Here's why: Exception handling in C++ allows you to deal with unexpected problems that occur during the execution of a program. A function can signal that something went wrong by "throwing" an exception. Let's break down the options: Option A: Using the 'throws' keyword - The `throws` keyword is not used in standard C++ for specifying exceptions. Languages like Java use `throws`. Option B: Using the 'exception' keyword - The `exception` keyword is related to exception classes but not to specifying if a function *might* throw an exception. Option C: Using the 'throws()' specifier - This is also incorrect. C++11 introduced `noexcept` for this purpose. Older C++ standards used something called exception specifications but they are largely deprecated and not the best practice to use anymore. Option D: Using the 'noexcept' specifier - The `noexcept` specifier is used to specify whether a function may throw an exception. If a function is declared `noexcept`, it promises *not* to throw any exceptions. If it *does* throw an exception, the program might terminate abruptly. The absence of `noexcept` does *not* mean the function *will* throw, only that it *might*.

A method to handle errors during runtime is the correct answer to “What is exception handling in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

throw is the correct answer to “Which keyword is used to throw an exception in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

To define the block of code that may generate exceptions is the correct answer to “What is the purpose of the 'try' block in exception handling in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

IOException is the correct answer to “Which of the following is not a standard exception class in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

To catch and handle exceptions is the correct answer to “What is the purpose of the 'catch' block in exception handling in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

assert function is the correct answer to “Which of the following is not a part of the exception handling mechanism in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It is a base class for all standard C++ exceptions is the correct answer to “What does the 'std::exception' class represent in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

catch (...) is the correct answer to “How do you catch all exceptions in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

what() is the correct answer to “Which function is used to retrieve the description of the exception in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

The program terminates abruptly is the correct answer to “What happens if an exception is thrown but not caught in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It is executed regardless of whether an exception is thrown or not is the correct answer to “Which of the following statements is true about the 'finally' block in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

To handle the exception at a different location is the correct answer to “What is the purpose of re-throwing an exception in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

<exception> is the correct answer to “Which header file is necessary for exception handling in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It throws an exception if a condition is false is the correct answer to “What is the function of the 'assert' macro in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

class MyException : public std::exception is the correct answer to “How do you define your own exception class in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It causes the program to crash is the correct answer to “What is the default behavior of an uncaught exception in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It represents errors detected during runtime is the correct answer to “What is the purpose of the 'std::runtime_error' class in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It indicates that a function will never throw an exception is the correct answer to “Which of the following is true about the 'noexcept' specifier in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It represents errors related to dynamic memory allocation is the correct answer to “What is the purpose of the 'std::bad_alloc' class in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

The program terminates unexpectedly is the correct answer to “What happens if an exception is thrown inside a 'catch' block in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

throw is the correct answer to “How do you re-throw the current exception in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It is an alternative to error codes is the correct answer to “Which of the following statements about exception handling in C++ is correct”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It represents a pointer to an exception object is the correct answer to “What is the purpose of the 'std::exception_ptr' class in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

Using a single catch block with multiple exception types is the correct answer to “How do you catch multiple exceptions of different types in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

class is the correct answer to “Which keyword is used to define a custom exception class in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It is called when an uncaught exception causes program termination is the correct answer to “What is the purpose of the 'std::terminate' function in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It prevents the 'new' operator from throwing exceptions is the correct answer to “What is the purpose of the 'nothrow' parameter in the 'new' operator in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

Using try-catch blocks outside the constructor is the correct answer to “How do you handle exceptions thrown from constructor initialization lists in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It represents errors in function calls is the correct answer to “What is the purpose of the 'std::bad_function_call' class in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It is executed regardless of whether an exception is thrown or not is the correct answer to “Which statement about the 'finally' block in C++ exception handling is true”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It represents exceptions nested within other exceptions is the correct answer to “What is the purpose of the 'std::nested_exception' class in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

Using a catch block with an ampersand (&) after the exception type is the correct answer to “How do you catch an exception by reference in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It represents errors in logical operations is the correct answer to “What is the purpose of the 'std::logic_error' class in C++ exception handling”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It leads to undefined behavior is the correct answer to “What happens if an exception is thrown inside a destructor in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

noexcept is the correct answer to “Which keyword is used to specify that a function will not throw any exceptions in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It checks if there are any uncaught exceptions is the correct answer to “What is the purpose of the 'std::uncaught_exception' function in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

<stdexcept> is the correct answer to “Which standard header file is required for exception handling in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

Using the 'noexcept' specifier is the correct answer to “How do you specify that a function will throw no exceptions in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.

It rethrows the current exception is the correct answer to “What is the purpose of the 'std::exception_ptr::rethrow' function in C++”. This question is standard in competitive examination syllabi for Exception Handling In C Plus Plus.