Why might a developer choose to use the Proxy design pattern in a systems architecture?

  • To add unnecessary complexity to the system
  • To improve system performance
  • To completely replace the original object
  • To reduce code modularity
Developers might choose to use the Proxy design pattern to improve system performance. The Proxy pattern allows you to create a placeholder for another object, which can help in scenarios like lazy loading, controlling access, or caching, ultimately leading to performance enhancements.

The principle that suggests that software entities should be open for extension but closed for modification is known as?

  • Single Responsibility Principle (SRP)
  • Open/Closed Principle (OCP)
  • Liskov Substitution Principle (LSP)
  • Interface Segregation Principle (ISP)
The Open/Closed Principle (OCP) recommends that software entities (such as classes, modules, or functions) should be designed in a way that allows for extensions without modifying their source code. This promotes code stability and reusability.

Discuss the implications of the Fault Density metric in determining the reliability and stability of a software product.

  • Higher fault density indicates better reliability
  • Fault density is unrelated to reliability
  • Lower fault density implies higher reliability
  • Fault density only measures performance
Fault Density is a key metric for software reliability and stability. A lower fault density indicates higher reliability, as it signifies that there are fewer defects or issues in the software. In contrast, higher fault density indicates a higher likelihood of reliability and stability problems, making the software less dependable.

What is the primary goal of Software Quality Assurance (SQA)?

  • Developing software quickly
  • Maximizing profits
  • Ensuring software quality
  • Writing code efficiently
The primary goal of Software Quality Assurance (SQA) is to ensure software quality. SQA focuses on establishing and maintaining processes and standards to produce high-quality software products. It involves activities such as quality planning, quality control, and quality improvement.

Which of the following is a key component of SQA?

  • Software Development
  • Software Testing
  • Code Optimization
  • Process Improvement
Process improvement is a key component of Software Quality Assurance (SQA). It involves identifying areas for improvement in the software development process, implementing changes, and monitoring the impact on quality. SQA is not primarily concerned with software testing or code optimization.

What is a Walkthrough in the context of software reviews?

  • A formal process to test the software
  • A casual meeting to discuss project progress
  • A systematic analysis of software code
  • A structured review of a document or code with the author and peers
A Walkthrough in software reviews is a structured review process where the author of a document or code presents it to peers or team members. The goal is to gain insight, identify issues, and ensure that the document or code is well-understood and meets the intended purpose. It's a collaborative and interactive process.

In the Agile model, Quality Assurance is often integrated into the _____ phase to ensure that the product evolves as per the customers requirements and standards.

  • Design
  • Development
  • Planning
  • Testing
In the Agile model, Quality Assurance is often integrated into the development phase to ensure that the product evolves as per the customers requirements and standards. Agile encourages constant feedback and iterative development, so quality assurance is an ongoing process throughout the development cycle.

The _____ pattern is used to create a copy of the existing object to enhance performance?

  • Singleton
  • Prototype
  • Decorator
  • Bridge
The Prototype design pattern is used to create a copy of an existing object to enhance performance. It is particularly useful when creating new objects is more expensive than copying an existing one, such as in scenarios where complex object initialization is involved.

What considerations must be taken into account when employing Black Box Testing in integration testing scenarios?

  • Data-driven testing
  • API compatibility
  • Code structure analysis
  • Unit testing coverage
When using Black Box Testing in integration testing, one must consider API compatibility between different software components. Integration testing focuses on the interactions between components, and ensuring APIs work correctly is crucial.

What is the main objective of software evolution?

  • To develop new software
  • To maintain the existing software
  • To document software requirements
  • To design software architecture
The main objective of software evolution is to maintain and improve the existing software. This involves activities like bug fixing, performance enhancements, and adapting to changing requirements.