Which tab in Browser Developer Tools is used to debug JavaScript code?
- Console
- Elements
- Network
- Sources
The "Sources" tab in Browser Developer Tools is used to debug JavaScript code. It allows developers to view and debug the source code of their web pages.
What are some techniques for optimizing images in responsive design?
- Compressing images, using responsive image tags, lazy loading, and using the srcset attribute
- Embedding images directly, using high-resolution images for all devices, avoiding image compression
- Using fixed image sizes, avoiding image sprites, not considering image formats
- Using only vector graphics, not optimizing images for responsive design, relying on browser defaults
Techniques for optimizing images in responsive design include compressing images, using responsive image tags, lazy loading, and utilizing the srcset attribute for different resolutions and sizes.
You're managing a large-scale cloud infrastructure. How would you ensure the security of your infrastructure using Infrastructure as Code principles?
- Automate security policies and configurations
- Ignore security in IaC
- Manual intervention for security
- Rely on third-party security tools
Infrastructure as Code (IaC) allows for automating security policies and configurations, ensuring consistency and reducing the risk of human error. By codifying security measures, you can enforce best practices and respond to security threats more efficiently.
Which attribute is used to provide an alternative text for an image in HTML?
- alt
- href
- src
- title
The alt attribute is used to provide alternative text for an image in HTML. This text is displayed if the image file cannot be loaded or if the user is using a screen reader. It is important for accessibility and SEO purposes.
Which database indexing technique helps in optimizing query performance by storing data in a sorted order?
- Bitmap Index
- Clustered Index
- Non-clustered Index
- Unique Index
A Clustered Index is a database indexing technique that helps in optimizing query performance by storing data in a sorted order based on the indexed columns. This physical ordering of data on the disk allows for faster retrieval of rows, especially when queries involve range-based searches or sorting. However, it's important to note that a table can have only one clustered index.
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.
How does "git reset" differ from "git revert"?
- git reset discards commits, and changes are lost
- git reset undoes a commit, preserving changes
- git revert discards commits, and changes are lost
- git revert undoes a commit, preserving changes
git reset discards commits and changes are lost, whereas git revert undoes a commit while preserving changes by creating a new commit that undoes the previous changes. Reset is more powerful and should be used with caution.
What are some advantages of using Gitflow over GitHub Flow?
- Centralized Workflow, Direct Commits, Fast Release Cycle
- Feature Branches, Strict Workflow, Well-defined Release Process
- Forking Workflow, Simplicity, Easy Collaboration
- Git Pull Requests, Loose Workflow, Continuous Deployment
Gitflow offers advantages such as Feature Branches for isolated development, a strict workflow for better control, and a well-defined release process, making it suitable for complex projects.
You're designing a database for an e-commerce platform. What factors would you consider when choosing between MySQL and PostgreSQL as the database management system?
- Scalability and Performance
- Data Integrity and Concurrency
- Community Support and Licensing
- Transaction Isolation and ACID Compliance
When choosing between MySQL and PostgreSQL, factors like scalability, performance, data integrity, concurrency, community support, licensing, and adherence to transaction isolation and ACID compliance are crucial. The correct option emphasizes scalability and performance considerations.