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Pune - 14 November 2006 by Persistent

Details of Pune - 14 November 2006 by Persistent conducted by Persistent for job interview.
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PERSISTENT PAPER ON 14th NOVEMBER AT PUNE

Hi
I have attended the persistent written test.

The paper consists of 2 test.
Test 1 -- consists of only technicalobjective questions, It has six sections & each have 5 Qns.
The sections are --
1. C Programming
2. Theory
3. Genera
4. OS
5. Database
6. Data Structures


1st SECTION(Data structures and Alogorithm.)

1)From the following when 43 will not be found by binary search (a series was given with last element 43 in each)

2)On which maximum operations cannot be performed .if we want to use abstract data type.
a)Array
b)Hash Table
c)Linked List
d)Heap
e)Binary Tree

3)A hash table has a size of 11 and data filled in its position like{3,5,7,9,6}how many comparisons have to be made if data is not found in the list in worst case
a) 2
b) 6
c) 11
d)
ANS:- 2

4)Forest with n Trees and having p edges then
a)n(1-p)
b) n = p +2
c) n-p+1
d)
e)

5)Find the shortest path from B to E
ANS: 7
one Question on Postfix.


2ndSECTION (C LANGAUGE)

1) what is int(*(*ptr (int))(void)
a)Pointer to function with no arguments(void) and return pointer to integer.
b)----
c)

2)func(char *s1,char * s2)
{
char *t;
t=s1;
s1=s2;
s2=t;
}
void main()
{
char *s1=?jack?, *s2=?jill?;
func(s1,s2);
printf(?%s %s ?,s1,s2);
}

OUTPUT jack jill

3) void main()
{
int a[5] ={1,2,3,4,5},i,j=2,b;
for (i =0;i 0 0
Find out the string

3)

5th section General

1)Probability to find digits which not contain 7 between 100 to 999
Ans=18/25

2)Difference between Packet switching & Circuit Switching.
Ans= CS take more time to established circuit.

3)in cache memory 100ns an in main memory 200ns what is the cache hit ratio.what % should be cache memory so that not more than 20 % is main memory accessed.
a.90%
b.95%
c.98%
d80%

4)From the set {a,b,c,d,e,f} find no. of arrangements for 3 alphabets with no data repeated.
ANS=360. OR for 4 alpha ANS=720.

5)

6th section (DBMS)

1)employee(eno,ename)
works_on(eno,pno,ename)
project(pno, project)
select ename from employee where eno in(select eno from works_on where pno =(select *from project)
what is the output ?
a)Employee who works on all project.
b)Employee who works one project .
c) name of employee who works on more than one project.
d)

2)Select ename from employee where salary = salary

3)what is the use of B-tree
a) has fixed index file size
b) is better for queries like < >=
c) searching will be easy
d)

4)Question on inner Join returning N- tuples & Full outer Join returns M- tuples. For both Variables are given & in options relationship is given to find whichever have greater tuples.And variable D is given------
a)then N= M
b) N = M + D
c)
d)

5) To save space which option is better
a) write all join operation then select then project
b) write all join operation then projects then select
c)write all join operation then select between project


Test 2- Consist of Two Questions. In this we have to make a C program.

Q.1)
Inward-spiral order matrix.
i.e you have to traverse the matrix in clockwise manner and display the elements,
for eg.

1 2 5 4
8 9 7 1
9 7 6 3
2 3 5 8

output should be 1, 2, 5, 4, 1, 3, 8, 5, 3, 2, 9, 8, 9, 7, 6, 7

Q.2)
insert operation on doubly link list.