Tech Mahindra Senior Software Engineer Interview Questions and Answers

I was asked to write a program to reverse a string using Java.

Q1. What are my roles and responsibilities?
Ans. 
As a Senior Software Engineer, your roles and responsibilities include leading development projects, mentoring junior team members, and ensuring high-quality code.
• Leading development projects from conception to completion

• Mentoring and providing guidance to junior team members

• Ensuring the quality of code through code reviews and testing

• Collaborating with cross-functional teams to deliver software solutions

• Staying update...read more
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Q2. Explain about polymorphism
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Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example of compile-time polymorphism: function overloading in C++.

• Example of runtime polymorphism: method overriding in Java.
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Q3. Explain the differences between regression testing and retesting
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Regression testing is testing the entire application after changes, while retesting is testing a specific bug fix.
• Regression testing involves testing the entire application to ensure that new code changes have not negatively impacted existing functionality.

• Retesting involves testing a specific bug fix to ensure that the issue has been resolved.

• Regression testing is typically done after every code change, while retestin...read more
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Q4. Explain about Pega testing
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Pega testing is a software testing process specifically designed for applications built on the Pega platform.
• Pega testing involves testing the functionality, performance, and security of applications developed using Pega technology.

• It includes testing various components such as user interfaces, business logic, integrations, and workflows.

• Test cases are designed to validate the behavior of Pega applications based on bus...read more
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Q1. Explain about Automation Framework
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Automation framework is a set of guidelines, best practices, tools, and libraries used to automate testing of software applications.
• Provides structure and guidelines for automated testing

• Helps in organizing test scripts and test data

• Supports reusability of code and components

• Facilitates easy maintenance and scalability

• Examples: Selenium WebDriver, TestNG, Cucumber
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Sql and pyhton moderate level questions

Q1. Bigquery and airflow architectire
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Q2. Sql window functions and analytical questions
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Q1. Can you tell me about yourself?
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Q2. What technical knowledge do you have about SQL development?
Ans. 
I have extensive experience in SQL development, including database design, optimization, and complex query writing.
• Proficient in writing complex SQL queries for data retrieval and manipulation, e.g., using JOINs, subqueries, and CTEs.

• Experience in database design and normalization to ensure data integrity and reduce redundancy.

• Skilled in performance tuning of SQL queries using indexing and query optimization techniques...read more
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Q3. What are some commonly used Unix commands?
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Unix commands are essential tools for file management, process control, and system navigation in Unix-like operating systems.
• ls: Lists files and directories in the current directory. Example: 'ls -l' for detailed listing.

• cd: Changes the current directory. Example: 'cd /home/user' to navigate to the user's home directory.

• cp: Copies files or directories. Example: 'cp file.txt /backup/' to copy 'file.txt' to the backup di...read more
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Q4. Educational qualification
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Q1. What is Can FD and why it is required.
Ans. 
CAN FD stands for Controller Area Network Flexible Data Rate, it is required for high-speed communication in automotive and industrial applications.
• CAN FD allows for higher data rates compared to traditional CAN networks

• It is necessary for transmitting large amounts of data quickly and efficiently

• Used in applications where real-time communication and reliability are crucial, such as automotive ECUs

• Example: CAN FD is us...read more
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Q2. Difference bewtween LKA and LDW.
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LKA stands for Lane Keep Assist, while LDW stands for Lane Departure Warning.
• LKA helps keep the vehicle centered in its lane by providing steering input if necessary.

• LDW alerts the driver if the vehicle is unintentionally drifting out of its lane.

• LKA is more proactive in assisting the driver with lane keeping, while LDW is more of a warning system.

• Some vehicles may have both LKA and LDW features integrated for enhanced...read more
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Q1. Aspice model and itr requirement.
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ASPICE (Automotive SPICE) model is a framework for software development in the automotive industry. ITR (Integrated Test Requirement) is a part of ASPICE focusing on testing requirements.
• ASPICE is a framework for software development in the automotive industry

• ITR is a part of ASPICE that focuses on testing requirements

• ASPICE helps in ensuring high-quality software development in automotive projects
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Q2. Writing the Test case for ADAS ECU.
Ans. 
Writing test cases for ADAS ECU involves verifying functionality and performance of the electronic control unit.
• Identify the input and output requirements of the ADAS ECU

• Create test cases to cover different scenarios such as normal operation, edge cases, and failure modes

• Include test cases for communication protocols, sensor inputs, and system responses

• Verify the integration of ADAS ECU with other components in the sys...read more
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Q1. Find average of integer arrays using java 8 streams
Ans. 
Calculate average of integer arrays using Java 8 streams
• Use IntStream to convert the array to a stream of integers

• Use average() method to calculate the average of the integers

• Collect the result using getAsDouble() method
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Q2. What is idempotency
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Idempotency is the property of an operation where applying it multiple times has the same effect as applying it once.
• Idempotency ensures that repeating the same operation multiple times will not change the result.

• Examples include GET requests in RESTful APIs, where multiple identical requests will return the same response.

• Idempotency is important in distributed systems to prevent duplicate operations.

• PUT and DELETE req...read more
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Q1. Functions And clsses
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