Mr Cooper Interview Questions and Answers

I am good at object-oriented programming, data structures, and algorithms in C++.

• Strong understanding of object-oriented programming principles

• Proficient in implementing data structures and algorithms in C++

• Experience with memory management and pointers

• Familiarity with C++ standard library and STL

• Ability to optimize code for performance and efficiency

Shallow copy creates a new object with the same reference as the original, while deep copy creates a new object with a new reference.

• Shallow copy only copies the top-level object, while deep copy copies all nested objects.

• Shallow copy is faster and uses less memory, while deep copy is slower and uses more memory.

• Examples of shallow copy include copying arrays and objects using the spread operator, while examples of deep copy include using JSON.parse(JSON.stringify(obj)) or im...read more

Copy constructor is a special constructor that creates a new object by copying an existing object.

• It is used to initialize an object with another object of the same class.

• It takes a reference to an object of the same class as an argument.

• It creates a new object with the same values as the object passed as argument.

• It is automatically called when a new object is created from an existing object.

• Example: MyClass obj1; MyClass obj2 = obj1; //copy constructor called

Polymorphism can be used to create a Card class with different types of cards. A function can then use polymorphism to randomize the pack.

• Create a Card class with different types of cards as subclasses

• Implement a function that creates a pack of cards using polymorphism to add different types of cards

• Use a random number generator to shuffle the pack

Implementation of Merge Sort on an array

• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Time complexity: O(n log n)

• Space complexity: O(n)

Virtual functions are functions that can be overridden by derived classes.

• Virtual functions are declared in a base class and can be overridden in derived classes.

• They allow for polymorphism, where a derived class object can be treated as a base class object.

• Virtual functions are called based on the actual object type, not the pointer or reference type.

• They are declared using the virtual keyword in the base class and can be overridden using the override keyword in the derived ...read more

STL in C++ provides reusable algorithms and data structures for efficient programming.

• STL includes containers like vector, list, map, algorithms like sort, find, and iterators.

• Example: vector v = {1, 2, 3}; sort(v.begin(), v.end());

• STL saves time by providing pre-implemented solutions for common programming tasks.

Design patterns in C++ are reusable solutions to common problems in software design.

• Design patterns help in creating flexible, maintainable, and scalable code.

• Examples of design patterns in C++ include Singleton, Factory, Observer, and Strategy.

• Each design pattern has a specific purpose and can be applied in different scenarios.

• Understanding design patterns can improve code quality and efficiency in software development.