Infosys Software Engineer Interview Questions and Answers for Experienced

I have worked on various projects, including web applications, mobile apps, and data analysis tools, showcasing my diverse skill set.

• Developed a full-stack web application using React and Node.js for a local business, improving their online presence.

• Created a mobile app for tracking fitness goals, which gained 1,000+ downloads on the App Store.

• Implemented a data analysis tool using Python and Pandas to help a non-...read more

Authentication verifies the identity of a user, while authorization determines what actions they are allowed to perform.

• Authentication confirms the identity of a user through credentials like passwords or biometrics

• Authorization determines the permissions and access levels a user has within a system

• Examples include logging in with a username and password (authentication) and being able to view/edit specific files ...read more

OOP (Object-Oriented Programming) is a programming paradigm based on objects and classes, promoting code reusability and modularity.

• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class using properties and methods of an existing class (e.g., a 'Dog' class inheriting from an 'Animal' class).

• Polymorphism: Ability to present the...read more

To reverse a number, convert it to a string, reverse the string, and convert it back to a number.

• Convert the number to a string

• Reverse the string

• Convert the reversed string back to a number

I work on a variety of technologies including Java, Python, SQL, and AWS.

• Java

• Python

• SQL

• AWS

Rotate an array to the right by k steps, modifying the original array in place.

• To rotate an array of strings, you can use slicing: arr = arr[-k:] + arr[:-k].

• Example: For arr = ['a', 'b', 'c', 'd', 'e'] and k = 2, result is ['d', 'e', 'a', 'b', 'c'].

• Handle cases where k is greater than the array length by using k = k % len(arr).

• Consider edge cases: empty array or k = 0 should return the original array.