how to set Nth bit of variable by using MACRO

3 Answers   HCL,

---

1. What is the output of printf("%d") 2. What will happen if I say delete this 3. Difference between "C structure" and "C++ structure". 4. Diffrence between a "assignment operator" and a "copy constructor" 5. What is the difference between "overloading" and "overridding"? 6. Explain the need for "Virtual Destructor". 7. Can we have "Virtual Constructors"? 8. What are the different types of polymorphism? 9. What are Virtual Functions? How to implement virtual functions in "C" 10. What are the different types of Storage classes? 11. What is Namespace? 12. What are the types of STL containers?. 13. Difference between "vector" and "array"? 14. How to write a program such that it will delete itself after exectution? 15. Can we generate a C++ source code from the binary file? 16. What are inline functions? 17. Talk sometiming about profiling? 18. How many lines of code you have written for a single program? 19. What is "strstream" ? 20. How to write Multithreaded applications using C++? 21. Explain "passing by value", "passing by pointer" and "passing by reference" 22. Write any small program that will compile in "C" but not in "C++" 23. Have you heard of "mutable" keyword? 24. What is a "RTTI"? 25. Is there something that I can do in C and not in C++? 26. Why preincrement operator is faster than postincrement? 27. What is the difference between "calloc" and "malloc"? 28. What will happen if I allocate memory using "new" and free it using "free" or allocate sing "calloc" and free it using "delete"? 29. What is Memory Alignment? 30. Explain working of printf. 31. Difference between "printf" and "sprintf". 32. What is "map" in STL? 33. When shall I use Multiple Inheritance? 34. What are the techniques you use for debugging? 35. How to reduce a final size of executable? 36. Give 2 examples of a code optimization.

2 Answers  

---

what are brk, sbrk?

1 Answers   Oracle,

---

Why void main is used in c?

0 Answers  

---

If the static variable is declared as global, will it be same as extern?

1 Answers   Samsung,

---

---

how many keywords are available in 'c' language a) 32 b) 34 c) 45 d) 48

1 Answers  

---

What is the use of getchar functions?

0 Answers  

---

What is meant by gets in c?

0 Answers  

---

What is the purpose of realloc()?

0 Answers  

---

Average of a couple 10 years ago was 25. The average remains same after having a child and twins after 3 years. What is the present age of the first child

10 Answers   IBM, Infosys,

---

void main() { static int i = 5; if(--i) { main(); printf("%d ",i); } } what would be output of the above program and justify your answer? }

5 Answers   C DAC, CDAC, Infosys, Wipro,

---

write a program to compare 2 numbers without using logical operators?

5 Answers   IBM,

---