Cognizant Technical Screening

Question 1

What is the time complexity of binary search in a sorted array?

Accepted Answer

O(log n)

Answer

O(n)

Answer

O(n^2)

Answer

O(1)

Question 2

Which of the following is a primary function of a database index?

Accepted Answer

To improve query performance

Answer

To store metadata

Answer

To encrypt data

Answer

To normalize data

Question 3

Which programming language is commonly used for backend web development?

Accepted Answer

Python

Answer

HTML

Answer

CSS

Answer

Bootstrap

Question 4

What does the 'public' keyword signify in Java?

Accepted Answer

Accessible from any other class

Answer

Accessible only within the package

Answer

Accessible only to the class

Answer

Accessible to subclasses only

Question 5

Which protocol is used for secure communication over the internet?

Accepted Answer

HTTPS

Answer

HTTP

Answer

FTP

Answer

SMTP

Question 6

What is the primary purpose of version control systems like Git?

Accepted Answer

Track changes in source code

Answer

Compile source code

Answer

Monitor runtime performance

Answer

Encrypt source code