API Testing and Architectures for QA/SDET Role in MAANG & Product Companies

 

 SDET Interview Question and Answers

TestNG Interview questions and answers

Jenkins Interview Questions and Answers

Appium Interview Questions and Answers

Selenium Interview Questions and answers

Java Coding Interview Questions and Answers

GIT Interview Questions and Answers

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🍀API Testing and Architectures🍀

APIs (Application Programming Interfaces) serve as the backbone of modern software applications, enabling seamless communication between different software components. API Testing plays a crucial role in ensuring the functionality, reliability, and security of these interfaces.

API Testing involves evaluating various aspects of an API, including its functionality, performance, security, and reliability. Testing APIs is essential as they act as bridges that allow different software systems to exchange data and functionality. A well-tested API ensures that applications can interact effectively, preventing potential issues such as data inconsistencies, security vulnerabilities, or service disruptions.

In this post we will discuss about two ways software is built — Microservices and Monoliths — and why it matters for testing APIs.

⛔️Microservices Architecture

Picture a Lego set! Microservices are like individual Lego pieces — small, independent parts. They work together by talking through APIs. This helps make big, complex projects more flexible and easy to handle.

Microservices architecture is an approach to software development where a complex application is divided into a set of small, independent services that communicate with each other through well-defined APIs. Each microservice is designed to perform a specific business function and can be developed, deployed, and scaled independently. This decentralized structure allows for increased agility, as different teams can work on separate microservices concurrently, and failures in one service don’t necessarily affect the entire system. Microservices promote scalability, flexibility, and easier maintenance but require a robust communication mechanism between services.

In API Testing:

👉Testing Blocks:

We can test each Lego block separately. It’s like checking each part of your project one by one.

👉Fast Testing:

Because they talk to each other, we can test them at the same time, making testing quicker.

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⛔️Monolith Architecture:

Now, imagine your Lego set as one big piece. 

🏰 Monoliths are like that — everything in one place. It’s simple but needs extra care.

Monolith architecture, in contrast to microservices, represents a traditional approach where an entire application is built as a single, tightly integrated unit. In a monolith, all components, functionalities, and modules are interconnected and share the same codebase and database. While monoliths are simpler to develop and deploy initially, they can become challenging to scale and maintain as the application grows. Changes or updates to one part of the system often require redeploying the entire application. Monoliths are known for their simplicity, but they may face limitations in terms of scalability and agility compared to more modular microservices architectures.

In API Testing:

👉Checking All Parts:

We need to test everything together to make sure our big Lego creation works perfectly.

👉Understanding Connections:

Testing helps us know how all the pieces connect and work as a team.

👉Checking the Whole Castle:

We test to make sure our entire castle (or project) does what it’s supposed to do.

⛔️Which one to choose?

Generally speaking, the monolithic architecture might be ideal for smaller, less complex applications or for businesses with limited resources to manage and maintain their IT systems.

In contrast, a microservices architecture may be more appropriate for larger and more intricate applications that demand greater scalability and flexibility.

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SeleniumWebdriver Automation Testing Interview Questions:

https://automationreinvented.blogspot.com/search/label/SeleniumWebdriver

API Testing Interview Question Set:

https://automationreinvented.blogspot.com/2022/03/top-80-api-testing-interview-questions.html

DevOps Interview Q&A:

https://automationreinvented.blogspot.com/2021/11/top-11-devops-interview-questions-and.html 

Kubernetes Interview Question Set

https://automationreinvented.blogspot.com/search/label/Kubernetes

Docker Interview Question Set

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Linux Interview question Set

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Automation Testing/SDET Framework Design

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Java Related Interview Question Set

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GIT Interview Question Set:

https://automationreinvented.blogspot.com/2021/09/top-40-git-interview-questions-and.html

Coding Interview Question Set:

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Mobile Testing Interview Question Set:

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Python Interview Question Set for QAE - SDET - SDE:

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Best Practices For Exception Handling In JAVA

 

Java Interview Questions SET-01

Java Interview Questions Set-02 ARRAY

Java Interview Questions Set-03 MAP

Java Interview Question Set-04

💛Best Practices Exception Handling 💚

Exception handling is crucial in test automation to handle unexpected errors.

👉Use try-catch blocks, assert statements, or custom exceptions tailored to specific errors for better control.

👉For instance, catch a NoSuchElementException gracefully, display relevant messages, or implement retries.

👉Improve your test scripts' resilience and maintainability with robust exception handling!

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⛔️Code Examples

try {

// Your code that might raise an exception

WebElement element = driver.findElement(By.xpath("//some/xpath"));
element.click();
} catch (NoSuchElementException e) {

// Handle the specific exception
System.out.println("Element not found: " + e.getMessage());

// Add recovery action or log for further analysis

// For example, you can retry the operation or log the error
}


⛔️Best Practices for Writing Try-Catch Blocks in Java:

👉Specificity is Key:

Catch specific exceptions rather than using a generic Exception block. This allows for targeted handling of different errors, enhancing code readability and maintainability.

👉Keep it Concise:

Only include code within the try-catch block that is susceptible to exceptions. Avoid placing large portions of code within the block to maintain focus on error-prone areas.

👉Log and Report:

Utilize logging mechanisms within the catch block to record details about the exception. This aids in troubleshooting and provides valuable insights into the root cause of issues during test execution.

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 SDET Interview Question and Answers

TestNG Interview questions and answers

Jenkins Interview Questions and Answers

ERROR VS EXCEPTION IN JAVA

In Java, "error" and "exception" are two distinct concepts that represent different types of issues in a program.

1. Error:

• Definition:
• Errors in Java represent severe problems that are typically beyond the control of the programmer. They are exceptional conditions that should not be caught or handled under normal circumstances.
• 
  
• Examples:
• Examples of errors include OutOfMemoryError (indicating insufficient memory to run the application) or StackOverflowError (caused by a stack overflow).
• 
  
• Handling:
• Errors are not meant to be caught or handled by the application. When an error occurs, it usually indicates a critical and unrecoverable problem, and the application is likely to terminate.

2. Exception:

• Definition:
• Exceptions in Java represent exceptional conditions that a program should catch and handle. They are events that occur during the execution of a program that disrupt the normal flow of instructions.
• 
  
• Examples:
• Examples of exceptions include NullPointerException (attempting to access a null object reference) or FileNotFoundException (attempting to open a file that does not exist).
• 
  
• Handling:
• Exceptions are meant to be caught and handled by the programmer. Java provides a mechanism using try, catch, and finally blocks to handle exceptions. This allows the program to gracefully respond to unexpected situations and continue its execution.

Summary:

• - Errors are severe issues beyond the programmer's control, and they are not meant to be caught or handled.
• - Exceptions are exceptional conditions that should be caught and handled to ensure the program's graceful execution.
• - Both errors and exceptions extend the Throwable class in Java, forming the basis for Java's exception handling mechanism.

Appium Interview Questions and Answers

Selenium Interview Questions and answers

Java Coding Interview Questions and Answers

GIT Interview Questions and Answers

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Top 21 Java Coding Interview Q&A for SDET

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 SDET Interview Question and Answers

TestNG Interview questions and answers

Jenkins Interview Questions and Answers

Appium Interview Questions and Answers

Selenium Interview Questions and answers

Java Coding Interview Questions and Answers

GIT Interview Questions and Answers

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SeleniumWebdriver Automation Testing Interview Questions:

https://automationreinvented.blogspot.com/search/label/SeleniumWebdriver

API Testing Interview Question Set:

https://automationreinvented.blogspot.com/2022/03/top-80-api-testing-interview-questions.html

DevOps Interview Q&A:

https://automationreinvented.blogspot.com/2021/11/top-11-devops-interview-questions-and.html 

Kubernetes Interview Question Set

https://automationreinvented.blogspot.com/search/label/Kubernetes

Docker Interview Question Set

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Linux Interview question Set

https://automationreinvented.blogspot.com/search/label/Linux

Automation Testing/SDET Framework Design

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Java Related Interview Question Set

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GIT Interview Question Set:

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Coding Interview Question Set:

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Mobile Testing Interview Question Set:

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Python Interview Question Set for QAE - SDET - SDE:

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