1) What is a dangling pointer?2) Which preprocessor directive is used to terminate conditional compilation?3) What is the difference between local and global variables?4) Can you access a structure member without the -> operator using a pointer to the structure?5) Which preprocessor directive is used to declare macros?6) What is dynamic memory allocation?7) List any 4 preprocessing directives?8) What are Structures?9) What is the use of the keyword “typedef ”?10) What are preprocessor directives?

A dangling pointer is a pointer that does not point to a valid object of the appropriate type. It usually occurs when an object is deleted or deallocated, without modifying the value of the pointer, so it still points to the memory location of the deallocated memory.

The #endif preprocessor directive is used to terminate conditional compilation.

Local variables are declared inside a function and can only be used within that function. Global variables are declared outside all functions and can be accessed by any function within the program.

Yes, you can access a structure member without the -> operator using a pointer to the structure. You would need to dereference the pointer using the * operator and then use the . operator to access the member.

The #define preprocessor directive is used to declare macros.

Dynamic memory allocation refers to the process of manually managing memory. In C, this is done using the malloc(), calloc(), realloc(), and free() functions.

Four preprocessing directives are #include, #define, #if, and #endif.

Structures in C are user-defined data types that allow us to store different types of data items together.

The typedef keyword is used in C to create an alias for existing data types. It's often used to simplify complex data type declarations.

Preprocessor directives are lines included in the code of programs that are not program statements but directives for the preprocessor. These lines are always preceded by a hash sign (#). They are used to make the program more efficient.