Tech Mahindra Software Engineer Interview Questions and Answers

Training a machine involves feeding it data and adjusting parameters to improve its performance on specific tasks.

• 1. Data Collection: Gather relevant data for the task, e.g., images for image recognition.

• 2. Data Preprocessing: Clean and format the data, such as normalizing pixel values in images.

• 3. Model Selection: Choose an appropriate algorithm, like neural networks for complex tasks.

• 4. Training: Use the data to...read more

Key concepts of Object-Oriented Programming include encapsulation, inheritance, polymorphism, and abstraction, enhancing code reusability.

• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: A 'Car' class with properties like 'speed' and methods like 'accelerate()'.

• Inheritance: Mechanism to create a new class from an existing class, inheriting its attributes and metho...read more

A queue is a linear data structure that follows the First-In-First-Out (FIFO) principle for managing elements.

• Elements are added at the rear and removed from the front.

• Common operations include enqueue (adding) and dequeue (removing).

• Example: A printer queue where print jobs are processed in the order they are received.

• Used in scenarios like task scheduling, breadth-first search in graphs, and handling requests in...read more

I have worked on diverse projects, including web applications, mobile apps, and machine learning models, enhancing my technical skills.

• 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, utilizing Flutter and Firebase for real-time data synchronization.

• Participated in a machine learning project that pr...read more

web.xml is a deployment descriptor for Java web applications, defining configuration and components like servlets and filters.

• Defines servlets and their mappings, e.g., <servlet> and <servlet-mapping> tags.

• Configures context parameters using <context-param>.

• Specifies security constraints with <security-constraint>.

• Allows for listener configuration with <listener>.

• Enables session confi...read more

The 'this' keyword in OOP refers to the current object instance, enabling access to its properties and methods.

• Refers to the current object instance in a class.

• Used to access instance variables and methods: e.g., 'this.name = name;' in a constructor.

• Helps differentiate between instance variables and parameters with the same name.

• In static methods, 'this' cannot be used as it refers to class-level context.

Method Overriding is a feature that allows a subclass to provide a specific implementation of a method that is already provided by its superclass.

• Occurs in inheritance when a subclass provides a specific implementation of a method that is already provided by its superclass

• The method in the subclass must have the same name, return type, and parameters as the method in the superclass

• The overridden method in the subc...read more