Instructions

  • 1. Your final score will reflect your grasp of the concepts—approach each question with precision.
  • 2. Thoroughly review each solution before proceeding to ensure full understanding.
  • 3. Final results will be available after submission to provide insights into areas for further improvement.
  • 4. Maintain academic integrity—plagiarism undermines learning and professional growth.
  • 5. Once submitted, responses are final, so ensure you’re confident in your answers.
  • 6. These challenges are designed to test practical knowledge; apply your skills as you would in real-world scenarios.

All Problems

Question

Action

What is a design pattern?

View

Which of these is a creational design pattern?

View

What is the purpose of the Singleton pattern?

View

Which pattern is used to provide a simplified interface to a complex system?

View

What is the purpose of the Observer pattern?

View

Which pattern involves wrapping an object to add new behaviors?

View

Which design pattern is commonly used for lazy initialization?

View

What is the difference between a Factory and a Builder pattern?

View

Which pattern ensures a class behaves as an interface to an external service?

View

How do you implement a Singleton in Python?

View

What is a design pattern?

A coding style guide
A reusable solution to common programming problems
A specific syntax for functions
A library of pre-written code

Which of these is a creational design pattern?

Singleton
Observer
Strategy
Decorator

What is the purpose of the Singleton pattern?

To allow multiple instances of a class
To restrict a class to a single instance
To implement inheritance
To allow operator overloading

Which pattern is used to provide a simplified interface to a complex system?

Facade
Adapter
Proxy
Strategy

What is the purpose of the Observer pattern?

To maintain state in classes
To allow multiple objects to react to changes
To create new objects
To define abstract methods

Which pattern involves wrapping an object to add new behaviors?

Decorator
Adapter
Builder
Factory

Which design pattern is commonly used for lazy initialization?

Singleton
Builder
Factory
Prototype

What is the difference between a Factory and a Builder pattern?

Builder creates objects step-by-step
Factory pattern constructs immutable objects
Builder only works with inheritance
Factory returns multiple objects at once

Which pattern ensures a class behaves as an interface to an external service?

Proxy
Adapter
Strategy
Observer

How do you implement a Singleton in Python?

By using a private constructor
Using a class-level instance and __new__() method
Overriding the __init__() method multiple times
Using super() to block new instances