Rebuild Technologies Services Interview Questions and Answers

WAP to find the 2nd maximum number in an array

• Sort the array in descending order and return the 2nd element

• Iterate through the array and keep track of the maximum and 2nd maximum

• Use a priority queue to find the 2nd maximum

Design patterns are reusable solutions to common software design problems.

• Design patterns provide a common vocabulary for developers to communicate about solutions to common problems.

• They can improve code readability, maintainability, and scalability.

• Examples include the Singleton pattern, Factory pattern, and Observer pattern.

SOLID principles are a set of five design principles for writing maintainable and scalable code.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes should be substitutable for their base types.

• I - Interface Segregation Principle: Clients should not be forced to depend on interfaces they do not use.

• D - ...read more

OOP stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.

• OOP focuses on creating objects that contain data and methods to manipulate that data.

• Encapsulation, inheritance, and polymorphism are key principles of OOP.

• Example: Inheritance allows a class to inherit properties and behaviors from another class.

I believe IOT has immense potential to revolutionize various industries by connecting devices and collecting data for analysis.

• IOT can improve efficiency and productivity by automating processes

• It can enhance customer experience by providing personalized services

• IOT can also enable predictive maintenance to reduce downtime

• Example: Smart home devices like thermostats and security cameras that can be controlled remotely