C/C++ Questions

How do you write a program which produces its own source code as its output?

How can I find the day of the week given the date?

Why doesn’t C have nested functions?

What is the most efficient way to count the number of bits which are set in a value?

How can I convert integers to binary or hexadecimal?


How can I call a function, given its name as a string?

How do I access command-line arguments?

How can I return multiple values from a function?

How can I invoke another program from within a C program?

How can I access memory located at a certain address?

How can I allocate arrays or structures bigger than 64K?

How can I find out how much memory is available?

How can I read a directory in a C program?

How can I increase the allowable number of simultaneously open files?

What’s wrong with the call fopen(”c:\newdir\file.dat”, “r”)?

* 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?

* 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?