The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - Solution - Abstract Contract Calcul

The video tutorial guides students through creating an abstract base contract called 'calculator' and a derived contract 'test' that performs a simple calculation. It emphasizes understanding abstract concepts and inheritance in programming. The tutorial includes testing and deployment, addressing potential errors and solutions. Encouragement is given to students to engage with complex ideas and apply them practically.

What is the primary purpose of creating an abstract base contract in programming?

• To define a blueprint for other contracts to inherit

• To provide a complete implementation of functions

• To store data permanently

• To execute functions directly

Which keyword is used to declare a function without implementation in an abstract contract?

• override

• static

• final

• abstract

In the derived contract 'test', what operation is performed to calculate the result?

• Subtraction

• Multiplication

• Division

• Addition

What is the result of the calculation performed in the 'test' contract?

• 3

• 4

• 2

• 1

Why might deploying an abstract contract directly result in an error?

• Because it has syntax errors

• Because it does not implement all abstract methods

• Because it is not compiled

• Because it lacks a main function

What can be done to successfully deploy an abstract contract?

• Add a main function

• Remove the abstract keyword and add empty curly brackets

• Add more functions

• Compile it with a different compiler

What is the expected output when the 'getresult' function is called in the 'calculator' contract?

• 1

• 2

• 3

• 0