10+ Tech Mahindra Associate Software Engineer Interview Questions and Answers for Freshers

NullPointerException is a runtime exception that occurs when a program tries to access or use an object reference that is null.

• It is a common exception in Java programming.

• It is thrown when a program attempts to use an object reference that has not been initialized.

• It indicates that there is an attempt to access or invoke a method on an object that is null.

• Example: String str = null; str.length();

Yes, by using the super() method in the derived class.

• super() method calls the base class method

• Derived class must inherit from the base class

• Example: class Derived(Base): def method(self): super().method()

Access specifiers define the level of access to class members. They ensure encapsulation and data hiding in object-oriented programming.

• Access specifiers are keywords used in class definitions to specify the access level of class members.

• There are three access specifiers in C++: public, private, and protected.

• Public members can be accessed from anywhere in the program, while private members can only be accessed within the class.

• Protected members can be accessed within the cla...read more

Call by value and call by reference are two ways of passing arguments to a function.

• Call by value passes a copy of the argument value to the function.

• Call by reference passes a reference to the memory location of the argument.

• Call by value is used for simple data types like int, float, etc.

• Call by reference is used for complex data types like arrays, structures, etc.

C++ supports polymorphism through virtual functions and inheritance.

• Polymorphism allows objects of different classes to be treated as if they were of the same class.

• Virtual functions are declared in the base class and overridden in the derived class.

• Dynamic binding is used to determine which function to call at runtime.

• Examples include function overriding, templates, and operator overloading.

OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.

• OOPs is a way of organizing and designing code around objects

• Variables are used to store data within an object

• In OOPs, variables are also known as properties or attributes

• Variables can have different access modifiers like public, private, protected

• Example: A car object can have properties like color, model, and speed

IOT is the interconnection of physical devices, while AngularJS is a JavaScript framework for web development.

• IOT enables devices to communicate and exchange data, leading to automation and efficiency in various industries.

• Examples of IOT include smart homes, wearable devices, and industrial automation.

• AngularJS simplifies web development by providing a framework for building dynamic and responsive web applications.

• Examples of AngularJS include Google Analytics, PayPal, and T...read more

Turbines are used to convert kinetic energy into mechanical energy. There are various types of turbines such as steam, gas, and hydraulic.

• Turbines are used in power generation, aviation, and marine propulsion.

• Steam turbines are used in thermal power plants to generate electricity.

• Gas turbines are used in aircraft engines and power plants.

• Hydraulic turbines are used in hydroelectric power plants.

• Wind turbines are used to generate electricity from wind energy.

• Turbines can be cl...read more

I am a dedicated and passionate software engineer with experience in Java, Python, and web development.

• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Excellent communication and teamwork abilities