Placement Papers - HP

Hi, I'm a final year MCA student. I attended HP campus interview and got selected for 10 months internship program.
IT was a pool campus in VVCE, Mysore
They offered job 4 B.E students.

They selected MCA students 4 internship and  we'll be converted as full time employees depending on our performance during the internship.
Stipend s 15,500/month and I've been assigned a java project

Placement pattern s as follows:

1.Written test:

20 questions on Reasoning(directions, seating arrangement,

Blood relations,venn diagrams,true-false logic),

25 technical questions(OS,DBMS,C, unix commands)

2.Technical Interview:

Basic java programs to write.
Explain the concepts of Object-oriented programming, Inheritance,

Abstract class, Interface, static keyword, multi-threading,synchronize,

Context switching, garbage collection, method overloading, overriding,

Exception handling, Collections,Servlets.

Basic SQL queries, joins, key constraint.
                     
3.Manager round:

Asked simplest puzzles that can b easily answered,
Mainly they check ur confidence level in tis...
                   
John's mother has 3 children-1 s March and the others April, what's the name f 3rd child?
                   
I've 3 coins - 2 r f equal size and 1 s fake... given a weighing machine, find the fake coin by weighing just once .how?
                   
By joining 3 points how do u obtain 4 equilateral triangles f same dimension?
                   
a+b+c=abc... find a, b,c?
                   
In a running race, if u overtake d person in 2nd position,  which place will u secure?
Few more puzzles, I don't remember exactly..

4.HR round:

Usual questions like - tell me about yourself, hobbies? y did u join MCA?
Whats your aim in life? why HP? ready to relocate r? and so on

U can clear all the rounds if u retain your confidence till the end.... shud ve gud .      
Technical knowledge(programming) also... B answerable 2
Whatever you mention in your resume....A d Best:).