Cognizant Core Knowledge and Fundamentals 2

Question 1

Which data structure uses LIFO (Last In, First Out) order?

Accepted Answer

Stack

Answer

Queue

Answer

Linked List

Answer

Tree

Question 2

What is the time complexity of binary search on a sorted array of n elements?

Accepted Answer

O(log n)

Answer

O(n)

Answer

O(n²)

Answer

O(n log n)

Question 3

In object-oriented programming, which concept allows a subclass to provide a specific implementation of a method already defined in its superclass?

Accepted Answer

Overriding

Answer

Encapsulation

Answer

Abstraction

Answer

Overloading

Question 4

Which SQL clause is used to filter results after a GROUP BY operation?

Accepted Answer

HAVING

Answer

WHERE

Answer

FILTER

Answer

ORDER BY

Question 5

What does the OSI model's Transport layer primarily handle?

Accepted Answer

End-to-end communication and error recovery

Answer

Physical transmission of bits

Answer

Logical addressing and routing

Answer

Session management between applications

Question 6

Which of the following is NOT a characteristic of a relational database?

Accepted Answer

Schema-less data storage

Answer

Data stored in tables

Answer

Use of primary keys

Answer

Support for SQL queries

Question 7

In a C program, what is the output of: printf("%d", 5 % 2);

Accepted Answer

1

Answer

2

Answer

2.5

Answer

0