Which AWS service is used for serverless computing?
- AWS Lambda
- Amazon EC2
- Amazon RDS
- Amazon S3
AWS Lambda is the AWS service used for serverless computing. It allows developers to run code without provisioning or managing servers. It's a cost-effective way to build applications that respond to events and scale automatically.
In GitHub Flow, when is a pull request typically merged into the main branch?
- After passing code review and approval
- As soon as the pull request is created
- Before any testing is done
- Only after the feature is fully implemented
In GitHub Flow, a pull request is typically merged into the main branch after it has undergone code review, received approvals, and any required tests have passed. This ensures the quality and integrity of the main branch.
Your team has encountered a critical issue in the production environment after deploying the software. Outline the steps you would take to address this issue and prevent similar incidents in the future.
- Conduct Root Cause Analysis
- Identify and Isolate the Issue
- Implement Automated Testing
- Rollback to the Previous Version
In response to a critical production issue, the key step is to conduct a root cause analysis. This involves identifying the underlying cause of the problem to implement a targeted solution. Rolling back may be necessary, but preventing future incidents requires understanding and addressing the root cause.
A web page is not rendering as expected in certain browsers. How can Browser Developer Tools assist in troubleshooting this issue?
- Check the Console tab for JavaScript errors
- Examine the Network tab for failed resource requests
- Use the Device Mode to simulate different devices and screen sizes
- Utilize the Elements panel to inspect and modify the HTML and CSS in real-time
To troubleshoot rendering issues in different browsers, the Elements panel helps inspect and modify HTML and CSS. It allows real-time adjustments to ensure the page renders correctly.
_______ logs are typically human-readable and provide information about system events and errors.
- Binary
- JSON
- Text
- XML
Text logs are typically human-readable and provide information about system events and errors. They are easy to interpret and analyze, making them widely used in logging for their simplicity and accessibility.
What is caching in web development?
- Compressing images in a web application
- Defining the layout of a webpage
- Encrypting data for security
- Storing frequently used data temporarily
Caching in web development refers to storing frequently used data temporarily. It helps improve performance by reducing the need to fetch the same data repeatedly from the server.
TDD promotes writing _______ that fail before writing new code to pass them.
- Comments
- Documentation
- Requirements
- Tests
Test-Driven Development (TDD) promotes writing tests that fail before writing new code to pass them. This iterative approach ensures that each new piece of code is validated against predefined test cases, contributing to a more robust and reliable codebase.
Explain a real-world scenario where the use of ACID properties in a database transaction is critical to ensuring data integrity.
- Blog Comments
- Logging Inventory Changes
- Online Banking Transactions
- User Authentication
In online banking transactions, the use of ACID properties (Atomicity, Consistency, Isolation, Durability) is critical to ensure the integrity of financial data. A failed transaction could lead to inconsistencies in the user's account balance, emphasizing the need for transactional reliability.
The indexOf() method in JavaScript returns the position of the first occurrence of a specified _______ within a string.
- Character
- Element
- Substring
- Value
The indexOf() method returns the position of the first occurrence of a specified character within a string. It helps in finding the index of a particular character or substring.
What is the purpose of "git cherry-pick"?
- Applying a specific commit to another branch
- Creating a new branch from the latest commit
- Merging two branches with conflicting changes
- Reverting all changes in the working directory
The purpose of "git cherry-pick" is to apply a specific commit from one branch to another. It allows developers to select and incorporate individual commits into a different branch, facilitating the selective integration of changes.