What is Docker used for in containerization?
- Containerization
- DevOps
- Orchestration
- Virtualization
Docker is primarily used for containerization. It allows developers to package applications and their dependencies into containers, ensuring consistency across different environments and simplifying deployment. Containerization, as facilitated by Docker, enhances scalability, portability, and resource efficiency.
You are reviewing a pull request and notice that a team member has made changes to a critical part of the codebase without any documentation. How would you address this situation?
- Comment on the pull request, requesting documentation before approval
- Approve the pull request without documentation but address it in the team meeting
- Reject the pull request until documentation is provided
- Discuss it privately with the team member
Option c is the most appropriate. Documentation is crucial, especially for critical changes. Rejecting the pull request until documentation is provided ensures comprehensive understanding and accountability.
You're building a form validation script in JavaScript. How would you ensure that an email input field contains a valid email address before submitting the form?
- Using Regular Expressions: /^[^s@]+@[^s@]+.[^s@]+$/
- Checking for '@' and '.' occurrences
- Using a predefined list of valid email addresses
- Using validateEmail() function
To ensure that an email input field contains a valid email address in JavaScript, you can use regular expressions. The provided regex (/^[^s@]+@[^s@]+.[^s@]+$/) validates the basic structure of an email address. The correct option offers a robust and standard approach.
What is the primary key in a relational database?
- A key that can be NULL
- A key that is not unique
- A key that is shared among multiple tables
- A unique identifier for a record in a table
The primary key in a relational database is a unique identifier for a record in a table. It ensures the uniqueness of each record and is used for referencing data in other tables.
Your team needs to store and analyze large amounts of unstructured data. Which cloud platform service would be the most suitable, and what features make it suitable for this scenario?
- AWS S3
- Azure Blob Storage
- Google Cloud Storage
- IBM Cloud Object Storage
Google Cloud Storage is the optimal choice for storing and analyzing large amounts of unstructured data. It provides low-latency access, strong consistency, and integrates seamlessly with Google Cloud's powerful analytics and machine learning tools.
The Decorator design pattern adds _______ responsibilities to objects without altering their structure.
- additional
- enhanced
- extended
- new
The Decorator design pattern adds additional responsibilities to objects without altering their structure. This pattern is useful for extending the functionalities of objects dynamically.
Your application encounters a critical error in production. Describe the steps you would take to troubleshoot and resolve the issue efficiently.
- Analyzing error logs and stack traces
- Ignoring the error and waiting for user reports
- Restarting the production server immediately
- Rolling back to the previous version
Analyzing error logs and stack traces is a crucial step in troubleshooting. It helps identify the root cause of the issue, allowing for a targeted and efficient resolution.
In Gitflow, what is the purpose of the release branch?
- Experimental Features, Continuous Integration, Rapid Prototyping
- Hotfix Testing, Bug Fixes, Continuous Deployment
- Long-term Development, Feature Merging, Code Reviews
- Stabilize Code, Finalize Features, Prepare for Deployment
The release branch in Gitflow is used to stabilize code, finalize features, and prepare for deployment. It allows for a controlled process of preparing a release version.
_______ is a feature offered by collaboration platforms to help developers resolve conflicts that arise when merging code changes from different branches.
- Branch Versioning
- Code Review
- Conflict Avoidance
- Merge Conflict Resolution
Merge Conflict Resolution is a feature that helps developers resolve conflicts arising from merging code changes in collaboration platforms. It ensures smooth integration and collaboration within a development team.
You are tasked with improving the performance of a responsive website. What strategies would you employ to achieve this?
- Implement lazy loading for resources
- Minify and concatenate CSS and JavaScript files
- Optimize images and media files
- Utilize Content Delivery Network (CDN)
To improve the performance of a responsive website, using a Content Delivery Network (CDN) helps distribute resources geographically, reducing latency.