Quantitative aptitude and basic computer aptitude quiz

1)The retail price of rice decreased from Rs. 16 kg to Rs. 12 per kg. Find the percentage decrease.
a. 25%
b. 33.3%
c. 12.5%
d. 20%

2)A train 280 meters long is moving at a speed of 60 km/hr. The time taken by the train to cross a platform 220 meters long is
(a) 30 seconds
(b) 25 seconds
(c) 35 seconds
(d) 20 seconds

Basic Computer quiz

Q.1 If h is any hashing function and is used to hash n keys in to a table of size m, where n<=m, the expected number of collisions involving a particular key x is :
(A) less than 1. (B) less than n.
(C) less than m. (D) less than n/2.
Ans:A

Q.2 Let A be an adjacency matrix of a graph G. The th ij entry in the matrix K A , gives
(A) The number of paths of length K from vertex Vi to vertex Vj.
(B) Shortest path of K edges from vertex Vi to vertex Vj.
(C) Length of a Eulerian path from vertex Vi to vertex Vj.
(D) Length of a Hamiltonian cycle from vertex Vi to vertex Vj.
Ans:B