BA3 Developer Interview Questions and Answers

The number of barbers required depends on the average number of haircuts per day and the time it takes to complete a haircut.

• The average number of haircuts per day per barber is typically around 10-15.

• The time it takes to complete a haircut is usually around 30 minutes.

• Assuming each person gets a haircut once every month, the number of haircuts per day would be 10000 / 30 = 333.33.

• To accommodate this, around 333.33 / 10 = 33.33 barbers would be required.

Classes are like blueprints and objects are like things made using those blueprints.

• Classes are like instructions or rules that tell us how to make something.

• Objects are the actual things that we make using those instructions.

• For example, a class 'Car' tells us how to make a car, and an object 'myCar' is the actual car that we make using those instructions.

Object Oriented Programming (OOP) concepts include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods together in a class to hide implementation details.

• Inheritance: Creating new classes from existing ones, inheriting their properties and behaviors.

• Polymorphism: The ability of objects of different classes to respond to the same method in different ways.

• Abstraction: Simplifying complex systems by breaking them down into smaller, ...read more

Blockchain is a decentralized digital ledger technology that securely records transactions across multiple computers.

• Decentralization: No central authority; data is distributed across a network of computers.

• Immutability: Once recorded, transactions cannot be altered, ensuring data integrity.

• Transparency: All participants can view the transaction history, promoting trust.

• Consensus Mechanisms: Transactions are validated through methods like Proof of Work or Proof of Stake.

• Appli...read more