Persistent Technical C Questions

Persistent Recruitment mode :Campus recruitment

College : Government Engineering College, Aurangabad

RECRUITMENT FOR: Development/Testing

The test consisted of a 1hr technical objective questions and 1hr ,Programming test. Tech. 
Questions There were six sections and each consist of 5 questions

Computer Algorithms
1. Time Complexity
2. Which of the following cannot be implemented efficiently in Linear Linked List

1. Quicksort
2. Radix Sort
3. Polynomials
4. Insertion Sort
5. Binary Search

3. In binary search tree , n=nodes, h=height of tree.
What's complexity?
1. o(h)
2. o(n*h)
3. o(nLogn)
4. o(n*n)
5. None

C Programs
1. Printf("%d%d",i++,i++);
1. Compiler Dependent
2. 4 4
3. 4 3
4. 3 4
5. None of Above
2. void main()
{
printf("persistent");
main();
}
1. Till stack overflows 
2. Infinite
3. 65535
4. 34423
5. None
3. Swapping
4. what does it do?
void f(int n)
{
if(n>0)
{
if(A[i]>A[j])
swap();
}
else
f(n-1);
}
1. Swap
2. Sort in Ascending order
3. Sort in Descending order
4. Computes permutation
5.
5. Given a Fibonacci function
f1=1;f2=1
fn=f(n-1)+f(n-2) which of the following is true?
1. Every Second element is even
2. Every third element is odd
3. The series increases monotonally
4. For n>2, fn=ceiling(1.6 * f(n-1))
5. None
Operating System
1. Where the root dir should be located 
1. Anywhere on System disk
2. Anywhere on Disk'
3. In Main memory
4. At a fixed location on Disk
5. At fixed location on System Disk
2. Problem on Concurrency
3. Problem on Round Robin Algorithm

General
1. If x is odd, in which of the following y must be
even
1. X+Y=5
2. 2(X+Y)=7
3. 2X + Y =6
4. X+2Y=7

2. 1000! How many digits? What is the most significant and Least significant digit

Theory
1. If a production is given
S -> 1S1
0S0
00
11
Then which of the following is invalid 
1. 00101010100
.
2. Context free grammar cannot recognize
1. if-then-else
2. var
3. loops
4. syntax
5. None
.
DBMS
1. If table A has m rows and table B has n rows then how many rows will the following query return
SELECT A.A1,B.B1
FROM A,B
WHERE A.A3=B.B3
1. <=(m*n)
2. m*n
3. <=(m+n)
4. >=(m+n) and <=(m*n)
5. m+n

2. A Query optimizer optimizes according to which of the following criteria
1. Execution time
2. Disk access
3. CPU usage
4. Communication time
5. None

3. Which of the following is not a characteristic of a transaction
1. Atomicity
2. Consistency
3. Normalization
4. Isolation
5. Durability

4. The def. of Foreign key is there to support
1. Referential integrity
2. Constraint

5. Problem
Process A Process B
WRITELOCK(X) WRITELOCK(Y)
READ(X) READ(Y)
... ...
1. The problem is serializable
2. The problem is not serializable 
3. It can be run in parallel

PROGRAMMING SECTION 
(This consisted of Two programs to be solved in 1 hour.) 
A sparse matrix is a matrix in which a node with val=0 is not represented. The whole matrix is represented by a Linked list where node typedef struct Node
{
int row;
int col;
int value;
sparsematrix next;
}Element, *sparsematrix;
The problem is, if there are two matrix given suppose m1 and m2, then add them and return the resultant sparsematrix.
If suppose there are N functions say from 0,1,2,... N-1 and it's given that A[i][j]=1 if the function i contains a call to
func. j otherwise A[i][j]=0, then write a function that will form groups of related functions and print them line by line and at the end print the number of total groups