FAQS

C  FAQS

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  General

  
  
  • How can I convert a number to a string?
  • How can I convert a string to a number?
  • When should a type cast be used?
  • What is the difference between NULL and NUL?
  • Differentiate between functions read() and write().
  • What is static memory allocation and dynamic memory allocation?
  • Is it possible to execute code even after the program exits the main() function?
  • Can include files be nested?
  • Difference between calloc and malloc?
  
  
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  Functions

  
  
  • How do I write a function that takes variable number of arguments?
  • Difference between printf and sprintf?
  
  
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  Pointers

  
  
  • How do you print an address?
  • What is a const pointer?
  • What is the difference between const char *p, char const *p, and char* const p?
  • What is garbage collection?
  • When should a far pointer be used?
  
  
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  Strings

  
  
  • Write a fucntion that will reverse a string.
  • How to use function strdup( ) in a program?
  
  
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  Macros

  
  
  • How do you override a defined macro?
  • How can you check to see whether a symbol is defined?
  • What is the benefit of using an enum rather than a #define constant?
  • What's the difference between a null pointer, a NULL macro, the ASCII NUL character and a null string?
  
  

Data Structures FAQS

• Define Abstract data types (stack, queue, dequeue ... etch)
• Describe Stacks and name a couple of places where stacks are useful.
• What is the difference between Stack and Queue?
• Define hashing
• Describe one simple rehashing policy.
• Describe Depth first Search algorithm.
• What are the advantages and disadvantages of B-star trees over Binary trees?

C++ FAQS

• What are C++ storage classes?
• What is a Null object?
• When does a name clash occur?
• What is polymorphism?
• What are proxy objects?
• Difference between C structure and C++ structure?
• What is Constructor ? How it is called ?
• Differentiate between "new" and "malloc" ?
• Difference between overloading and overriding?
• Why doesn't C have nested functions?
• Describe the main characteristics of static functions.
• What is passing by reference?
• When do use "const" reference arguments in function?
• What is virtual function?
• What is the use of 'using' declaration?
• What is assignment operator?
• What is copy constructor?
• When are copy constructors called?
• What is conversion constructor?
• What is difference between template and macro??
• When are temporary variables created by C++ compiler?
• What is Memory alignment??
• What do you mean by Stack unwinding?

* We will also add FAQS for other technology.
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