Infosys System Engineer Trainee Interview Questions and Answers

OOP (Object-Oriented Programming) is a programming paradigm based on objects that encapsulate data and behavior.

• 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 same interface for ...read more

SDLC stands for Software Development Life Cycle, a structured process for developing software applications.

• Phases include: Requirement Analysis, Design, Implementation, Testing, Deployment, and Maintenance.

• Example: In Requirement Analysis, stakeholders define what the software should do.

• Design phase involves creating architecture and user interface layouts.

• Implementation is where actual coding takes place.

• Testing ...read more

The code for swapping two numbers involves using a temporary variable to store one of the numbers before swapping them.

• Declare three variables: a, b, and temp.

• Assign values to a and b.

• Store the value of a in temp.

• Assign the value of b to a.

• Assign the value of temp to b.

Python code to generate Fibonacci sequence

• Use a loop to generate Fibonacci numbers

• Start with 0 and 1 as the first two numbers

• Add the previous two numbers to get the next number

• Repeat until desired number of Fibonacci numbers are generated

A string is a sequence of characters, typically used to represent text.

• A string is enclosed in quotation marks, either single ('') or double ("").

• Strings can contain letters, numbers, symbols, and spaces.

• Examples: 'hello', "12345", 'special characters: !@#$%^&*'

Quick sort is a popular sorting algorithm that uses a divide-and-conquer approach to sort an array efficiently.

• Divides the array into two sub-arrays based on a pivot element

• Recursively sorts the sub-arrays

• Combines the sorted sub-arrays to produce the final sorted array

• Example: [3, 6, 8, 10, 1, 2, 1] -> [1, 1, 2, 3, 6, 8, 10]