Bangalore Interview on 16/05/2007

Firstly there was aptitude test at 10PM. It was for 1 hour and had 50 questions with negative marking .
I attempted 42 and scored 30 .It had same pattern as previous papers. Comprehension, data interpretation, logical reasoning, numerical analysis.
After test we had PPT for 45 minutes. It ended at 12.30. Then they announced results at 1 pm. 65 got through and i was 1 among them.
Then interview started at 2. technical interview was first.
int: tell me about yourself?
int: your family background?
int: what are the subjects you are studying in this semester?
i was still coninuing to tell 1 by 1. i said MECHATRONICS at last
int: what did you study in mechatronics ?
me: sensors, transducers, actuactors, microprocessors sir
int: where are those microprocessors used in real life?
me: they are used in ECU's of automobiles, washing machines, refrigerators
int: whats their role in refrigerators?
me: there will be some sensors in refrigerator that will sense temperature inside the refrigerator, after sensing the temperature it will send the
info to microprocessor.
microprocessor will compare it with desired temperature, if it is more or less, then it will increase or decrease the temperature inside the
refrigerator.
int: how? how microprocessor reduce temperature?
me: microprocessor will reduce the voltage supplied to the cooler, so there will be less cooling and obviously temperature inside the
refrigerator will increase.
int: solve this problem
7 ltrs of water at 900c and 3 ltrs of water at 600c are mixed and what will be the final temperature at steady state?
me:( i wrote V1T1=V2T2 ) around 75-80 sir.
int: how?
me: coz water at 90c is more in quantity, so it doesn't reduce much.
int: what if water at 60c is more?
me: it will be come down to 65-70.
int: what if both are of same quantity?
me: it will be around 70-75
int: ok, do u know C?
int: where it is practically used?
me: it can be used to find interest and to program many other banking related problems.
int: calculate interest for Rs.10k for 9months @ 5% RI?
me: wrote down the formula SI=PTR/100, and solved it.
int: If you are given to program a banking software, what are the things you are going to collect from customer?
me: told about interest rate, period, principal amount.
int: dont you ask his name first?
me: i will ask his DOB, place, nationality, age, occupation. they are all primary things.
int:: do u have any questions?
me: asked him about training
Hr:
int: why is marks decreasing?
int: whats the difference between C and C++ ?
me: explained
int: any questions?
me:
ah .. s... sir.. again asked d dame question ant training and dragged it.
int: explained n said improve your presentation skill.
me: i will certainly do sir. when r u going to announce theresults, sir?
int: i will call you (!!!) or i will inform placement officer, it was very nice talking to you, thankks
Finally results were announced at 6pm, only 10 got through!