What does ACID stand for in the context of database transactions?
- Access, Control, Identification, Deletion
- Aggregation, Composition, Inheritance, Duplication
- Association, Collaboration, Integration, Deployment
- Atomicity, Consistency, Isolation, Durability
ACID stands for Atomicity, Consistency, Isolation, and Durability. These properties ensure the reliability and integrity of database transactions. Atomicity ensures that a transaction is treated as a single, indivisible unit of work. Consistency ensures that the database remains in a valid state before and after the transaction. Isolation prevents interference between concurrent transactions, and Durability ensures that the changes made by a committed transaction are permanent.
The term NoSQL refers to non-_______ databases.
- Relational
- SQL
- Structured
- Tabular
The term NoSQL refers to non-SQL databases. NoSQL databases are designed to handle unstructured or semi-structured data and provide flexibility in data storage and retrieval.
Resolving a merge conflict in Git often involves editing the conflicted files to reconcile the _______ changes made in different branches.
- Conflicting
- Mismatched
- Similar
- Unrelated
Resolving a merge conflict in Git requires reconciling the conflicting changes made in different branches. Developers need to edit the files to harmonize the modifications and create a unified version.
Suppose a critical bug is found in production. Describe the steps you would follow using Gitflow to fix the issue.
- Create a hotfix branch
- Merge the hotfix branch into develop
- Merge the hotfix branch into master and develop
- Tag the release
To fix a critical bug in production using Gitflow, create a hotfix branch, make the necessary changes, merge it into both master (for the release) and develop (to ensure the fix is in future releases), and then tag the release for tracking purposes.
Using descriptive commit messages and proper documentation can help in understanding and resolving merge conflicts more _______.
- Effectively
- Efficiently
- Precisely
- Seamlessly
Using descriptive commit messages and proper documentation can help in understanding and resolving merge conflicts more effectively. Clear communication through commit messages aids in tracking changes and makes it easier to comprehend the context of conflicting modifications.
In a distributed microservices architecture, how would you approach monitoring and logging to ensure effective troubleshooting and performance optimization?
- Implement only alert-based monitoring
- Log everything at the maximum verbosity level
- Rely on individual service logs
- Utilize centralized logging and monitoring tools
In a distributed microservices architecture, using centralized logging and monitoring tools is crucial for effective troubleshooting and performance optimization. This approach provides a unified view of the entire system, aiding in identifying issues and optimizing performance. Individual service logs may not offer a holistic perspective. Alert-based monitoring alone might miss subtler issues, and logging everything at maximum verbosity can lead to excessive data and performance overhead.
What does the
tag define in HTML?
- Form
- Image
- Link
- Paragraph
The
tag defines an image in an HTML document. It is a self-closing tag that requires attributes like src (source) to specify the image file path.
Your company's website stores sensitive customer data. What measures would you implement to ensure its security?
- All of the above
- Implement HTTPS with SSL/TLS
- Regularly update and patch software
- Store sensitive data encrypted
Ensuring the security of sensitive customer data involves multiple measures. HTTPS with SSL/TLS secures data in transit, regular software updates patch vulnerabilities, and storing sensitive data encrypted protects it even if there's unauthorized access.
What status code is returned by a RESTful API to indicate a successful request?
- 200 OK
- 201 Created
- 404 Not Found
- 500 Internal Server Error
The status code returned by a RESTful API to indicate a successful request is 200 OK. This status code indicates that the request was successful, and the server has fulfilled the client's request.
A company needs to handle large volumes of semi-structured data. Which type of database would you recommend, and why?
- Both SQL and NoSQL
- It depends on the specific requirements
- NoSQL
- SQL
When dealing with large volumes of semi-structured data, a NoSQL database is recommended. NoSQL databases can handle flexible schema designs, making them suitable for semi-structured data like JSON or XML.