C Question

· Difference between arrays and pointers?
· What is the purpose of realloc( )?
· What is static memory allocation and dynamic memory allocation?
· How are pointer variables initialized?
· Are pointers integers?
· What is a pointer variable?
· What is a pointer value and address?
· What is a method?
· What are the advantages of the functions?
· What is the purpose of main( ) function?
· What is an argument? differentiate between formal arguments and actual arguments?
· What is a function and built-in function?
· What is modular programming?
· When does the compiler not implicitly generate the address of the first element of an array?
· What are the characteristics of arrays in C?
· Differentiate between a linker and linkage?
· What are advantages and disadvantages of external storage class?
· Diffenentiate between an internal static and external static variable?
· What are the advantages of auto variables?
· What is storage class and what are storage variable?
· Which expression always return true? Which always return false?
· Write the equivalent expression for x%8?
· Why n++ executes faster than n+1?
· What is a modulus operator? What are the restrictions of a modulus operator?
· What is the difference between a string and an array?
· Is it better to use a pointer to navigate an array of values,or is it better to use a subscripted array name?
· Can the sizeof operator be used to tell the size of an array passed to a function?
· Is using exit() the same as using return?
· Is it possible to execute code even after the program exits the main() function?
· What is a static function?
· Why should I prototype a function?
· How do you print an address?
· Can math operations be performed on a void pointer?
· How can you determine the size of an allocated portion of memory?
· What is a “null pointer assignment” error? What are bus errors, memory faults, and core dumps?
· What is the difference between NULL and NUL?
· What is the heap?
· Can the size of an array be declared at runtime?
· What is the stack?
· When should a far pointer be used?
· What is the difference between far and near?
· Is it better to use malloc() or calloc()?
· Why should we assign NULL to the elements (pointer) after freeing them?
· When would you use a pointer to a function?
· How do you use a pointer to a function?
· Can you add pointers together? Why would you?
· What does it mean when a pointer is used in an if statement?
· Is NULL always defined as 0?
· What is a void pointer?
· What is a null pointer?
· How many levels of pointers can you have?
· What is indirection?
· How do you print only part of a string?
· How can I convert a string to a number?
· How can I convert a number to a string?
· What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used?
· How can you check to see whether a symbol is defined?
· How do you override a defined macro?
· What is #line used for?
· What is a pragma?
· What are the standard predefined macros?
· How can type-insensitive macros be created?
· How many levels deep can include files be nested?
· Can include files be nested?
· Can you define which header file to include at compile time?
· What is the difference between #include and #include “file”?
· Is it better to use a macro or a function?
· How are portions of a program disabled in demo versions?
· What is the benefit of using an enum rather than a #define constant?
· What is the benefit of using #define to declare a constant?
· Can a file other than a .h file be included with #include?
· How can you avoid including a header more than once?
· What will the preprocessor do for a program?
· What is a macro, and how do you use it?
· What is Preprocessor?
· How can I make sure that my program is the only one accessing a file?
· How can I open a file so that other programs can update it at the same time?
· How do you determine whether to use a stream function or a low-level function?
· What is the difference between text and binary modes?
· How can you restore a redirected standard stream?
· How do you redirect a standard stream?
· How can I search for data in a linked list?
· How can I sort a linked list?
· What is hashing?
· What is the quickest searching method to use?
· What is the easiest searching method to use?
· How can I sort things that are too large to bring into memory?
· What is the quickest sorting method to use?
· What is the easiest sorting method to use?
· What is the benefit of using const for declaring constants?
· Can static variables be declared in a header file?
· What is the difference between declaring a variable and defining a variable?
· Is it acceptable to declare/define a variable in a C header?
· When should a type cast not be used?
· When should a type cast be used?
· How can you determine the maximum value that a numeric variable can hold?
· How reliable are floating-point comparisons?
· Can a variable be both const and volatile?
· When should the volatile modifier be used?
· When should the register modifier be used? Does it really help?