The "git branch" command is used to _______.
- Create a new branch
- Delete a branch
- List all branches
- Merge branches
The "git branch" command, when used without any additional arguments, lists all existing branches in the Git repository. It's a handy command to see the available branches and the currently active branch.
_______ is a SQL command used to retrieve data from multiple tables simultaneously based on a specified condition.
- GROUP BY
- JOIN
- MERGE
- UNION
The JOIN command in SQL is used to retrieve data from multiple tables simultaneously based on a specified condition. It combines rows from two or more tables based on a related column.
Which of the following is a server-side language commonly used for web development?
- CSS
- HTML
- JavaScript
- PHP
PHP is a server-side scripting language commonly used for web development. It allows developers to create dynamic web pages and interact with databases on the server side.
What command is used to stage files for committing in Git?
- git add
- git commit
- git push
- git stage
The command used to stage files for committing in Git is git add. This command adds changes to the staging area, preparing them for the next commit. It allows for selective committing of changes.
What does SDLC stand for?
- Software Development Life Cycle
- Structured Design and Life Cycle
- System Design and Life Cycle
- Systematic Development Life Cycle
SDLC stands for Software Development Life Cycle. It is a systematic process for planning, creating, testing, deploying, and maintaining information systems.
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.
Your company is planning a major system upgrade, including migrating large volumes of data to a new platform. How would you minimize downtime and ensure data integrity during the migration process?
- Conduct the migration during off-peak hours with minimal user activity
- Implement a rollback plan in case of unexpected issues
- Perform thorough testing in a staging environment before the actual migration
- Utilize incremental migration to minimize the impact on operations
To minimize downtime and ensure data integrity during a system migration, it is crucial to perform thorough testing in a staging environment before the actual migration. This helps identify and address potential issues, ensuring a smooth transition to the new platform.