Answer / nishant

CRITICAL_SECTION :- CRITICAL_SECTION (CS) objects are initialized and deleted but do not have handles and are not shared by other processes. A variable should be declared to be of type CRITICAL_SECTION. Threads enter and leave a CS, and only one thread at a time can be in a specific CS. EnterCriticalSection blocks a thread if another thread is in the section. The waiting thread unblocks when another thread executes LeaveCriticalSection. If a thread already owns the CS, it can enter again without blocking; that is, CRITICAL_SECTIONs are recursive. CRITICAL_SECTIONs have the advantage of not being kernel objects and are maintained in user space. This usually, but not always, provides performance improvements.

Mutex: - mutexes can be named and have handles, they can also be used for interprocess synchronization between threads in separate processes. Mutex objects are similar to CSs, but, in addition to being process-sharable, mutexes allow time-out values and become signaled when abandoned by a terminating process.A thread gains mutex ownership (or locks the mutex) by waiting on the mutex handle (WaitForSingleObject or WaitForMultipleObjects), and it releases ownership with ReleaseMutex.

Semaphore :- Semaphores maintain a count, and the semaphore object is signaled when the count is greater than 0. The semaphore object is unsignaled when the count is 0.

Event :- Events are used to signal other threads that some event, such as a message being available, has occurred.

What is the difference between the ASSERT and VERIFY macros?

4 Answers  

---

Q1. A. What is unary operator? List out the different operators involved in the unary operator. B. What is an adjust field format flag? Q2. A. Distinguish between a # include and #define. B. Can a list of string be stored within a two dimensional array? Q3. A. Explain how a pointer to function can be declared in C++? B. List the merits and demerits of declaring a nested class in C++? Q4. A. What are the syntactic rules to be avoid ambiguity in multiple inheritence? B. Explain the operation of overloading of an assignment operator. Q5. A. Explain how the virtual base class is different from the conventional base classes of the opps. B. Explain how an exception handler is defined and invoked in a Program. Q6. A. What is a binary file? List the merits and demerits of the binary file usagein C++. B. Write short notes on Text Manipulation Routines. C. Write bites in Turbo c++ Header ("Include") Files.

3 Answers   ABC, HCL, Infosys,

---

What is serialization ?which function is responsible for serializing data ?

5 Answers  

---

What is CALLBACK? How it work? what is the advantage of CALLBACK, please explain with an example

6 Answers  

---

Tell me about different kinds of synchranization objects ?

6 Answers  

---

What is the use of CObject::Dump function ?

4 Answers  

---

how to repaint when working with horizontal scroll bar

0 Answers  

---

Psychic Window Technique

2 Answers   E Logic, Wild Net,

---

1)How to change the size of a button at run time ?

1 Answers  

---

1)does Frame Thickness in MFC?

1 Answers   winfoware,

---

What is the difference between Struts and JSF? Pls list some most suitable differences.

0 Answers  

---

List out the parameters of WinMain Function.

2 Answers   Mphasis,

---