Cognizant Associate Software Engineer Interview Questions and Answers

Common picture file formats include JPEG, PNG, GIF, and BMP, each serving different purposes in image storage and display.

• JPEG: Widely used for photographs; supports lossy compression.

• PNG: Supports lossless compression and transparency; ideal for web graphics.

• GIF: Supports animation and limited color palette; commonly used for simple graphics.

• BMP: Uncompressed format; large file size, used in Windows applications.

AI, IoT, Blockchain, Cloud Computing, AR/VR, 5G

• Artificial Intelligence (AI) and Machine Learning (ML) for automation and decision-making

• Internet of Things (IoT) for connected devices and data collection

• Blockchain for secure and transparent transactions

• Cloud Computing for scalable and flexible infrastructure

• Augmented Reality (AR) and Virtual Reality (VR) for immersive experiences

• 5G for faster and more reliable conn...read more

A primary key uniquely identifies a record, while a unique key ensures all values in a column are distinct but allows nulls.

• Primary key cannot contain NULL values; unique key can contain one NULL value.

• A table can have only one primary key, but multiple unique keys.

• Primary key is used to establish relationships between tables; unique key is used to enforce uniqueness.

• Example: In a 'Users' table, 'UserID' can be a ...read more

This C program counts the occurrences of a specified alphabet in a given string.

• Use an array to store the string input from the user.

• Iterate through the string using a loop to count occurrences.

• Use a variable to keep track of the frequency of the specified alphabet.

• Example: For input 'hello', and searching for 'l', the output should be 2.

Python is a high-level programming language used for web development, data analysis, artificial intelligence, and automation.

• Python is easy to learn and has a simple syntax

• Python supports multiple programming paradigms such as object-oriented, functional, and procedural programming

• Python has a vast standard library with modules for various tasks such as web development, data analysis, and machine learning

• Python is...read more