What happens when a variable is passed to a function "by value" in C?, The function receives the memory address and can modify the original variable., The function receives a copy of the variable and cannot change the original variable outside the function., The function automatically converts the variable into a pointer., The original variable is temporarily deleted until the function finishes executing., Why is it required to cast a void pointer (e.g., (int *)ptr) before dereferencing it?, Because a void pointer takes up less memory and needs to be expanded., To convert the void pointer into a function pointer., To prevent the pointer from becoming a dangling pointer., Because the compiler does not know the data type stored at that address, so casting tells it how to interpret the bytes., Which of the following best describes a "wild pointer"?, A pointer that has been declared but not initialized, containing a random garbage address., A pointer that points to a function instead of data., A pointer that still holds the address of an object that is no longer valid., A pointer that has been explicitly set to a safe, empty state., What is the primary benefit of using callbacks (function pointers)?, They allow a function to run faster by skipping memory allocation., They automatically reset dangling pointers to NULL to prevent crashes., They let the caller decide the exact behavior at runtime, making the called function flexible and reusable., They eliminate the need to use the indirection operator (*)..

Activity

بواسطة
طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

)
استعادة الحفظ التلقائي: ؟