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If you are starting to looking for a job, get an interview arranged with yahoo it will give you some real good preparation so that you can crack other interviews easily. One of my friend attended it few days back, here are the questions asked

Telephonic Round
Design classes for the following problem A Customer Can have multiple bank accounts A Bank account can be owned by multiple customers When customer logs in he sees list of account, opn clicking on an account he sees list of transactions

Round 1
1. How to call a C++ function which is compiled with C++ compiler in C code?
2. When you deliver your C++ headers and C++ library of a class (what all can you change in the class so that application using your class does not need to recompile the code)
3. How do you initialize a static member of a class with return value of some function?
4. How can one application use same api provided by different vendors at the same time ?
5. If you are given the name of the function at run time how will you invoke the function?

Round 2
1. When will you use shell script/perl ahead of C/C++ ?
2. How does yahoo handles billions of requests, does it create a thread per request or a process ?
3. How does HTTP works?
4. How to count number of unique music titles downloaded from a log file which contains an entry of all music title downloaded?
5. What is the difference between COM and CORBA?
6. What is webservice ?