Mirafra Technologies
EXPRO Interview Questions and Answers
Q1. what is data structures and types with examples of all types
Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.
Types of data structures include arrays, linked lists, stacks, queues, trees, graphs, and hash tables.
Arrays are a collection of elements stored in contiguous memory locations, accessed using an index.
Linked lists are a series of nodes where each node contains data and a reference to the next node.
Stacks follow the Last In First Out (LIFO) principle, where ele...read more
Q2. what is oops concept example with each one
Object-oriented programming concepts include encapsulation, inheritance, polymorphism, and abstraction.
Encapsulation: bundling data and methods that operate on the data into a single unit (class). Example: class Car with properties like make, model, and methods like start(), stop().
Inheritance: creating new classes based on existing classes, inheriting their attributes and methods. Example: class SUV inheriting from class Car.
Polymorphism: ability of objects to take on multip...read more
Q3. what is class and objects with example and code
A class is a blueprint for creating objects in object-oriented programming. Objects are instances of classes.
A class defines the properties and behaviors of objects. For example, a 'Car' class may have properties like 'color' and 'model', and behaviors like 'drive' and 'stop'.
An object is an instance of a class. For example, 'myCar' can be an object of the 'Car' class with specific values for 'color' and 'model'.
Code example in Python: class Car: def __init__(self, color, mod...read more
Q4. what is virutal function and staic functions
Virtual functions are functions in a base class that are overridden in derived classes, while static functions belong to the class itself rather than instances.
Virtual functions allow for dynamic binding and polymorphism in object-oriented programming.
Static functions are associated with the class itself and can be called without creating an instance of the class.
Example: virtual void display() = 0; // pure virtual function in C++
Example: static void printMessage() { cout << ...read more
Q5. What is Polymorphism
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
Polymorphism allows objects of different classes to be treated as objects of a common superclass.
It enables a single interface to represent multiple data types.
Examples include method overloading and method overriding in object-oriented programming.
Q6. Reverse a string
Reverse a given string
Use a loop to iterate through the characters of the string
Append each character to a new string in reverse order
Return the reversed string
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