Cognizant Coding and Programming Round 3

Question 1

What is the output of the following C code: int x = 5; printf("%d", x++);

Accepted Answer

5

Answer

Post-increment (x++) uses the current value of x (5) in the expression, then increments it afterward.

Question 2

Which of the following best describes a hash collision?

Accepted Answer

Two keys map to the same hash value

Answer

A hash collision occurs when two distinct keys produce the same hash index, requiring a resolution strategy.

Question 3

What does the SQL statement 'SELECT DISTINCT' do?

Accepted Answer

Removes duplicate rows from the result set

Answer

DISTINCT eliminates duplicate rows from the query result, returning only unique values.

Question 4

In object-oriented programming, what is encapsulation?

Accepted Answer

Bundling data and methods that operate on it within a class

Answer

Encapsulation bundles data (fields) and behavior (methods) together in a class while restricting direct external access.

Question 5

Which traversal of a binary search tree produces nodes in sorted order?

Accepted Answer

In-order

Answer

In-order traversal (left → root → right) visits BST nodes in ascending sorted order.

(Cognizant) Cognizant Test Practice Test