Algorithms
Complexity Analysis and Asymptotic Notations
Marks 1Marks 2
Searching and Sorting
Marks 1Marks 2
Divide and Conquer Method
Marks 1Marks 2
Greedy Method
Marks 1Marks 2
P and NP Concepts
Marks 1Marks 2
Dynamic Programming
Marks 1Marks 2
1
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
Consider the following functions: F(n) = 2n
G(n) = n!
H(n) = nlogn
Which of the following statements about the asymptotic behaviour of f(n), g(n), and h(n) is true?
A
f(n) = O (g(n)); g(n) = O(h(n))
B
f(n) = $$\Omega$$ (g(n)); g(n) = O(h(n))
C
g(n) = O (f(n)); h(n) = O(f(n))
D
h(n) = O (f(n)); g(n) = $$\Omega$$ (f(n))
2
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
You are given the post order traversal, P, of a binary search tree on the n element, 1,2,....,n. You have to determine the unique binary search tree that has P as its post order traversal. What is the time complexity of the most efficient algorithm for doing this?
A
$$\Theta \,(\log n)$$
B
$$\Theta \,(n)$$
C
$$\Theta \,(n\log n)$$
D
None of the above, as the tree cannot be uniquely determined.
3
GATE CSE 2007
MCQ (Single Correct Answer)
+2
-0.6
In the following C function, let n $$ \ge $$ m.
int gcd(n,m)
{
if (n % m == 0) return m;
n = n % m;
return gcd(m,n);
}
How many recursive calls are made by this function?
A
$$\Theta(\log_2n)$$
B
$$\Omega(n)$$
C
$$\Theta(\log_2\log_2n)$$
D
$$\Theta(\sqrt{n})$$
4
GATE CSE 2007
MCQ (Single Correct Answer)
+2
-0.6
What is the time complexity of the following recursive function?
int DoSomething(int n){
 if(n <= 2)
     return 1;
 else
     return (floor(sqrt(n)) + n);
}
A
$$\Theta \,({n^2})$$
B
$$\Theta \,(n\,{\log _2}\,n)$$
C
$$\Theta \,({\log _2}\,n)$$
D
$$\Theta \,({\log _2}\,{\log _2}\,n)$$
GATE CSE Subjects
Theory of Computation
Operating Systems
Algorithms
Digital Logic
Database Management System
Data Structures
Computer Networks
Software Engineering
Compiler Design
Web Technologies
General Aptitude
Discrete Mathematics
Programming Languages
Computer Organization