**QA (Quality Assurance)** is neither a test nor **QC (Quality Control)**. Instead, QA is a **process-oriented approach** that focuses on ensuring that the **processes** used during software development are designed and followed in a way that results in a high-quality product. QA aims to **prevent defects** by improving the development processes, standards, and methodologies. 

On the other hand:
- **QC (Quality Control)** is a **product-oriented** activity that focuses on **detecting defects** in the software by performing various **tests** (manual or automated). QC ensures that the product meets the specified requirements and is free of defects before it is released.

### QA vs. QC:

| **Aspect**               | **QA (Quality Assurance)**                            | **QC (Quality Control)**                         |
|--------------------------|-------------------------------------------------------|--------------------------------------------------|
| **Focus**                | Focuses on **process improvement** to prevent defects. | Focuses on **detecting defects** in the actual product. |
| **Type of Activity**      | **Preventive**: Ensures that processes are followed correctly to avoid defects. | **Corrective**: Identifies and fixes defects in the product. |
| **Goal**                 | To improve processes so that the software is developed correctly. | To ensure the software works as intended by finding defects. |
| **Scope**                | Covers the entire **software development lifecycle (SDLC)**. | Focuses primarily on the **testing phase** of the product. |
| **Methods**              | Process definition, audits, training, reviews.         | Testing, inspections, defect tracking.           |

### Conclusion:
- **QA (Quality Assurance)** is **process-focused** and works to **prevent defects** by improving the overall development process.
- **QC (Quality Control)** is **product-focused** and involves **testing** to identify and fix defects in the software.
- **Testing** is a part of **QC**, which is ultimately a part of the broader **QA** process.

Is QA a test or QC?

Grokking the Coding Interview Patterns in Java, Python, JS, C++, C#, and Go. The most comprehensive course with 476 Lessons.

Grokking the Coding Interview: Patterns for Coding Questions

Unlock Coding Interview Success: Dive Deep into Data Structures and Algorithms.

Grokking Data Structures & Algorithms for Coding Interviews

Master advanced coding patterns for interviews: Unlock the key to acing MAANG-level coding questions.

Grokking Advanced Coding Patterns for Interviews

Master essential tree coding patterns to excel in technical interviews and enhance your problem-solving skills.


Grokking Tree Coding Patterns for Interviews

Learn algorithm complexity and Big-O through practical examples to optimize code, ace interviews, and enhance problem-solving skills.

Grokking Algorithm Complexity and Big-O

Unlock the secrets of acing coding interviews with "Grokking 75 - Top Coding Interview Questions," the definitive course made for those determined to excel in interviews at top tech giants like the FAANG companies. This expertly designed course zeroes in on the most important and frequently asked questions from the past year, ensuring you engage with material that's both up-to-date and highly relevant. Whether you're pressed for time or just looking to refine your coding skills, this course promises to equip you with the knowledge and skills necessary to navigate the complexities of technical interviews confidently.

The course is meticulously structured to cater to a wide range of learners—from aspiring software engineers and seasoned professionals seeking a refresher, to students eager to bolster their problem-solving capabilities. With features like pattern-based learning, multilingual support, and real interview simulations, "Grokking 75" transforms your preparation into an immersive learning experience. Dive into a curriculum that covers critical patterns such as Sliding Window, Two Pointers, Dynamic Programming, Backtracking, and Graph Algorithms, among others, and emerge fully prepared to tackle any coding challenge thrown your way. Don't just prepare—master the art of coding interviews with a course that’s as ambitious as you are.

Grokking 75: Top Coding Interview Questions

Grokking System Design Fundamentals is designed to equip software engineers with the essential knowledge and skills required to design large complex systems.

Grokking System Design Fundamentals

Unlock the secrets of graph algorithms and ace your coding interviews with confidence!

Grokking Graph Algorithms for Coding Interviews

Learn the art of recursive problem solving to ace the coding interview.

Grokking the Art of Recursion for Coding Interviews

Grokking the System Design Interview is a comprehensive course for system design interview. It provides a step-by-step guide to answering system design questions.

Grokking the System Design Interview

Crack SQL Tech Interviews: Master core concepts and queries to solve complex problems and impress in your next interview.

Grokking SQL for Tech Interviews

Master multithreading and concurrency with practical examples to tackle race conditions, deadlocks, and coding interview challenges effectively.

Grokking Multithreading and Concurrency for Coding Interviews

Grokking the System Design Interview. This course covers the most important system design questions for building distributed and scalable systems.


Grokking the Advanced System Design Interview

Master microservices design patterns for designing scalable, resilient, and more manageable systems.

Grokking Microservices Design Patterns

Learn how to prepare for object oriented design interviews and practice common object oriented design interview questions. Master low level design interview.

Grokking the Object Oriented Design Interview

Grokking Dynamic Programming Patterns for Coding Interviews in Python, Java, JavaScript, and C++. A complete guide to grokking dynamic programming. 

Grokking Dynamic Programming Patterns for Coding Interviews

Grokking Behavioral Interviews: A Practical Roadmap for Software Engineers, Product Managers, and Engineering Managers.

Grokking Modern Behavioral Interview

Crack the Meta Coding Interview: The Ultimate Guide to Master the Top 50 Crucial Coding Interview Questions.

Grokking Meta Coding Interview

Master the art of engineering management and ace your next leadership interview with confidence and skill.

Grokking the Engineering Manager Interview

Master SOLID design principles with practical examples to build robust, maintainable software and enhance your system design skills.

Grokking SOLID Design Principles

Crack the Microsoft Coding Interview: The Ultimate Guide to Master the Top 50 Crucial Coding Interview Questions.

Grokking Microsoft Coding Interview

Prepare for engineering manager coding interviews with targeted practice, problem-solving strategies, and guidance to showcase leadership and technical expertise.

Grokking the Engineering Manager Coding Interview

Crack the Amazon Coding Interview: The Ultimate Guide to Master the Top 50 Crucial Coding Interview Questions.

Grokking Amazon Coding Interview

Crack the LinkedIn Coding Interview: The Ultimate Guide to Master the Top 40 Crucial Coding Interview Questions.

Grokking LinkedIn Coding Interview

Crack the Google Coding Interview: The Ultimate Guide to Master the Top 50 Crucial Google Coding Interview Questions.

Grokking Google Coding Interview

Crack the Oracle Coding Interview: The Ultimate Guide to Master the Top 50 Crucial Coding Interview Questions.

Grokking Oracle Coding Interview

Master the art of engineering management and ace your next leadership interview with confidence and skill.


Grokking Engineering Leadership Interviews

Ace your technical interviews by mastering relational database design with real-world case studies.

Relational Database Design and Modeling for Software Engineers

Learn to code in Python and unlock new career opportunities with our comprehensive, hands-on course.

Grokking Python Fundamentals

Unlock the power of design patterns: Elevate your coding skills with timeless solutions for top-notch software design.

Grokking Design Patterns for Engineers and Managers

Learn to code in JavaScript and kickstart your web development journey with our beginner-friendly course.

Grokking JavaScript Fundamentals

Unlock your true worth: Master salary negotiation and get the compensation you deserve!


Grokking Tech Salary Negotiations

QA (Quality Assurance) is neither a test nor QC (Quality Control). Instead, QA is a process-oriented approach that focuses on ensuring that the processes used during software development are designed and followed in a way that results in a high-quality product. QA aims to prevent defects by improving the development processes, standards, and methodologies. 

On the other hand:

QC (Quality Control) is a product-oriented activity that focuses on detecting defects in the software by performing various tests (manual or automated). QC ensures that the product meets the specified requirements and is free of defects before it is released.

Aspect	QA (Quality Assurance)	QC (Quality Control)
Focus	Focuses on process improvement to prevent defects.	Focuses on detecting defects in the actual product.
Type of Activity	Preventive: Ensures that processes are followed correctly to avoid defects.	Corrective: Identifies and fixes defects in the product.
Goal	To improve processes so that the software is developed correctly.	To ensure the software works as intended by finding defects.
Scope	Covers the entire software development lifecycle (SDLC).	Focuses primarily on the testing phase of the product.
Methods	Process definition, audits, training, reviews.	Testing, inspections, defect tracking.