Tech Mahindra Software Engineer Interview Questions and Answers for Freshers

OOPs concepts are the principles of Object-Oriented Programming that focus on encapsulation, inheritance, and polymorphism.

• Encapsulation: bundling of data and methods that manipulate the data within a single unit

• Inheritance: ability of a class to inherit properties and methods from a parent class

• Polymorphism: ability of objects to take on multiple forms or behaviors

• Abstraction: hiding the implementation details of a class from the outside world

• Example: A car is an object that...read more

Java is a high-level, object-oriented programming language, while C++ is a low-level, multi-paradigm language.

• Java is platform-independent, while C++ is platform-dependent.

• Java uses automatic garbage collection, while C++ requires manual memory management.

• Java does not support pointers, while C++ does.

• Java has a simpler syntax compared to C++.

• Java is more secure due to its strong type checking and exception handling mechanisms.

A technical interview is a job interview for positions in the technology industry where candidates are evaluated on their technical skills and knowledge.

• Technical interviews typically involve coding challenges, problem-solving exercises, and discussions about technical concepts.

• Candidates may be asked to write code on a whiteboard, solve algorithmic problems, or explain their approach to solving a technical challenge.

• Interviewers may also ask questions about the candidate's e...read more

Single inheritance allows a class to inherit from only one parent class, while multiple inheritance allows a class to inherit from multiple parent classes.

• Single inheritance: class A can inherit from class B.

• Multiple inheritance: class A can inherit from class B and class C.

• Single inheritance is simpler and easier to understand.

• Multiple inheritance can lead to ambiguity and complexity, known as the diamond problem.

• Languages like Java support single inheritance, while language...read more

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• SQL is used in various industries including finance, healthcare, and e-commerce

• Common SQL commands include SELECT, INSERT, UPDATE, and DELETE

Regression, sanity, and smoke testing are different types of software testing.

• Regression testing is done to ensure that new code changes do not negatively impact existing functionality.

• Sanity testing is a narrow and focused testing to quickly determine if a new functionality is working as expected.

• Smoke testing is a preliminary testing to check if the software build is stable enough for further testing.

• Regression testing is comprehensive and time-consuming, sanity testing is ...read more

Long form refers to the complete or expanded version of an acronym or abbreviation.

• Long form is used to provide clarity and avoid confusion.

• It is commonly used in technical fields and academia.

• Examples include NASA (National Aeronautics and Space Administration) and AIDS (Acquired Immune Deficiency Syndrome).