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Home » Placement Papers » Persistent Placement Papers »Persistent Placement Paper 3

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Persistent Placement Paper 3


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Persistent paper(based on memory).

THERE ARE TWO ROUND OF WRITTEN.

IN THE 1ST ROUND it was objective which consists of 6 sections AND EACH SECTION HAS 5 QS. Duration 1hour

1ST SECTION:( DATA STRUCTURE)

1. question from binary search tree ans(250)
2.
3. hash table problem ans(5)
4. adjacent matrix to calculate shortest path ans(7)
5.


2ndSECTION (C LANGAUGE)

1 what is int(*(*ptr (int))(void)
2. recursion to find the value of GET(I don't remaember the digit but it is 2 arguments (ans 6)
3.
4 recursion function to calculate fun(4,9)( ans e)
5 problem from strcmp

3rd SECTION(O.S)

1.
2 string reference is given calculate the page fault based on LRU (ans:3 or 6)
3cache hit ratio numerical (ans 98%)
4 ans 360 (but I am not sure)
5

4TH SECTION(DBMS)

1. query is given based on table employ(eno,name,salary..),workl(eno,.),project(pno,..)
select eno from employ where eno in(select eno from workl groupby eno where count(*)=(select count(*) from project))
2.select eno from emply where salary=salary
3.which is not required in trascation
options are (a).atomicity (b)isolation (c)normalization (d)concerrancy
4.
5

5TH SECTION(TOC)

1. one transtion state is given identify the grammer it accept
1
2. 0
0 1 1,0
option are( a) (10)* (b) string starting from 1 (c) ) string starting from 0
(d) 1*0*

2.totolagy ans(b)
3
4
5 S->1S1
S->00
S->11
S->0S0
Option are (a) 00100100 {b) 110010001(c) I don't remember


6th SECTION (GENERAL COMPUTER)

1
2. difference between packet swiching and circuit swiching
3. what is the probiblity of the occurance of 7 beetween 0 and 999 ans(18/25)
4. ans (360)
5. ans (37000)


SECOND ROUND (OF 1HOUR) (VERY VERY TOUGH)

TWO C PROGRAMS ARE GIVEN

Q1. U have to write the function for matrix addition using link list.

It is called "sparse matrix" .The structure for the element is as follows.

Typedef struct element{
Int row;
Int column;
Int value;
Element * next;
}element,sparsematrin*;

If value contains zero then there should not be node assign for that.U have to also check boundary condition in your program.

Function is:
SparseMatrix SmAdd(SaprseMatrix m1,SparseMatrix m2)
( Revised concept of linked list and have a look at coding..)

Q2.Problem:-

One boy has to climb steps. He can climb 1 or 2 steps at a time.
Write a function that will returns number of way a boy can climb the steps.
Int WaytoSteps(int n)
(eg:- suppose number of steps is n=4 ,the function will return 5

(one-one-one-one ,one-one-two, one-two-one-,two-one-one, two-two)
second round is vey important for getting selected.




 

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