Cprogramminginterviewquestions 120622074544-phpapp01
- 2. Q.1: What is C language in your opinion?
- 3. Developed by Dennis Ritchie between 1969 & 1973. Developed at the Bell Laboratories, aimed to use with UNIX OS. Widely used for developing application software, though it was mainly invented for developing system software.
- 4. Q.2: What is a static variable in context of C language?
- 5. Declared inside a function. Declared for function name. Declared for Global parameters.
- 6. Q.3: Can you explain the difference between a normal variable and a pointer?
- 7. A normal variable can have any value and can be changed throughout the length of the program. A pointer defines the address where another variable is stored and not any value.
- 8. Q.4: What is the difference between calloc() and malloc()?
- 9. malloc() will create single block of memory of size specified by the user. Example - p=(int*)malloc(sizeof(int)*5) calloc() takes two arguments and zero initializes the memory. It can assign multiple blocks of memory for a variable. Example - p=(int*)calloc(5,sizeof(int)*5)
- 10. Q.5: What is the difference between printf() and sprint()?
- 11. Printf() outputs the data to the standard output device which is usually the computer monitor. Sprint() outputs the data to a character array.
- 12. Q.6: Which is the fastest sorting method you can use while programming in c language?
- 13. This is a question which falls into “There is no one-size-fits-all answer” category. But few options are- Quick sort. Radix sort. Merge sort.
- 14. Q.7: Is using functions or macros better when programming in C?
- 15. Macros are generally more efficient and faster. Macros cannot handle complex programming constructs and in such cases functions are used We can choose macros or functions based on our priority - speed vs. size of program.
- 16. Q.8: What is a Stack?
- 17. Stack is where information required to call and return function resides It also stores a functions local variable Stack follows a FIFO model
- 18. Q.9: What is the difference between C and C++?
- 19. C++ is an advanced version of C which introduced a lot of new features like classes and so on. It’s much more object oriented compared to the general purpose programming C was initially created for.
- 20. Q.10: Is it good to use goto statement?
- 21. goto statements are used to implement a local jump during program execution. It is not considered a good practice to use goto statements and should be avoided as much as possible.
- 22. For more C++ gyan, log on to- YourNextLeap.com