Executive Software Developer Interview Questions and Answers

Virtual functions allow polymorphism, abstract classes cannot be instantiated, pure virtual functions have no implementation.

• Virtual functions are functions in a base class that can be overridden in derived classes

• Abstract classes are classes that have at least one pure virtual function and cannot be instantiated

• Pure virtual functions have no implementation and must be overridden in derived classes

• Virtual functions can have an implementation in the base class, pure virtual fu...read more

Copy constructor creates a new object by copying an existing object of the same class.

• Copy constructor is used to create a new object with the same values as an existing object.

• It takes an object of the same class as a parameter.

• It is different from regular constructors as it creates a new object by copying an existing object.

• Copy constructor is invoked when an object is passed by value or returned by value.

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Inheritance allows code reuse and promotes code organization.

• There are different types of inheritance: single, multiple, multilevel, hierarchical, and hybrid.

• Single inheritance involves a class inheriting from a single base class.

• Multiple inheritance involves a class inheriting from multiple base classes.

• Multilevel inheritance involves a class inheriting ...read more

Theoretical questions assess your foundational knowledge and problem-solving skills in software development.

• Understand core concepts like algorithms and data structures; e.g., sorting algorithms like QuickSort.

• Be prepared to discuss design patterns; e.g., Singleton or Factory patterns.

• Familiarize yourself with software development methodologies; e.g., Agile vs. Waterfall.

• Know about version control systems; e.g., Git and its branching strategies.

Insertion Sort is a simple sorting algorithm that builds a sorted array one element at a time.

• Works by dividing the array into a sorted and an unsorted part.

• Starts with the second element, compares it to the first, and inserts it in the correct position.

• Repeats this process for each subsequent element until the entire array is sorted.

• Example: For array [5, 2, 9, 1], it sorts as follows: [5], [2, 5], [2, 5, 9], [1, 2, 5, 9].

• Time complexity is O(n^2) in the worst case, making i...read more

You can swap two variables without a third variable using arithmetic operations or bitwise XOR, maintaining their values.

• Using Arithmetic: a = a + b; b = a - b; a = a - b; // This method uses addition and subtraction to swap values.

• Using Bitwise XOR: a = a ^ b; b = a ^ b; a = a ^ b; // This method uses the XOR operation to swap values without a third variable.

• No Additional Memory: Both methods achieve the swap without requiring extra memory for a third variable, making them e...read more

OOP is a programming paradigm based on objects, encapsulating data and behavior through four main concepts: encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: A 'Car' class with properties like 'speed' and methods like 'accelerate()'.

• Inheritance: Mechanism to create a new class from an existing class, inheriting its attributes and methods. Example: 'ElectricCar' inherits...read more

Lambda functions are anonymous functions that can be passed as arguments or stored in variables.

• Lambda functions are also known as anonymous functions or closures.

• They are commonly used in functional programming languages like Python and JavaScript.

• Lambda functions can be used to create higher-order functions, which take other functions as arguments.

• They are often used for filtering, mapping, and reducing data in collections.

• Lambda functions can be defined using the lambda ke...read more