C

#pragma inline only tells the compiler that source code of program contain inline assembly language code .In c we can write assembly language program with help of asm keyword.

A pointer is pointer to another pointer which can be pointer to others pointers and so on is known as multilevel pointers. We can have any level of pointers.

The pointer which can point or access whole the residence memory of RAM i.e. which can access all the 16 segments is known as huge pointer.

Yes, we can rename any function using typedef keyword. It is useful when function declaration is too complex and we have to give any simple name or if we have to create more numbers of function of the same type.

Keyword static is used for declaring static variables in c. This modifier is used with all data types like int, float, double, array, pointer, structure, function etc.

Both .com and .exe program are executable program but .com program execute faster than .exe program. All drivers are .com program. .com file has higher preference than .exe For example:

TSO means terminate but stay outside. It is that program, which release the main memory after the execution of the program. Example ms paint, notepad, turbo c compilers etc.



TSR means terminate but stay residence .It is those program, which after the execution of the program does not release the RAM (main memory).e.g. antivirus.

Turbo c is an IDE of c programming language created by Borland. Turbo C 3.0  is based on MS DOS operation  system. It is one of the most popular c compilers. It uses 8086 microprocessor which is 16 bit microprocessor. It has 20 address buses and 16 data bus. Its word length is two byte.

fgets() is safer than gets(), because we can specify a maximum input length. Neither one is completely safe, because the compiler can't prove that programmer won't overflow the buffer he pass to fgets ().

Both copy a string. strcpy wants a buffer to copy into. strdup allocates a buffer using malloc().

Unlike strcpy(), strdup() is not specified by ANSI .