What are the drawbacks of using serializability as the isolation level in database transactions?
- Enhanced data integrity
- Improved scalability
- Increased data consistency
- Reduced concurrency and performance
Serializability as the isolation level in database transactions comes with drawbacks, including reduced concurrency and performance. While it ensures strong data consistency, it may lead to contention for resources and slower processing times.
In a scenario where a database experiences performance issues due to a high volume of reads, what optimization strategies would you consider?
- Denormalization
- Index optimization
- Query caching
- Sharding
In the context of high read volume, index optimization is a crucial strategy. It involves creating efficient indexes to speed up read queries, enhancing database performance.
React is a JavaScript library for building _______ user interfaces.
- Dynamic
- Interactive
- Responsive
- User
React is a JavaScript library for building responsive user interfaces. It enables the creation of UIs that can adapt to various screen sizes and devices.
For assessing the throughput of data pipelines, ________ is a crucial metric analyzed by performance testing tools.
- Bandwidth
- Latency
- Scalability
- Throughput
Throughput is a crucial metric in performance testing of data pipelines. It measures the rate at which data can be processed and transmitted, providing insights into the system's efficiency and capacity.
How does the concept of data federation impact BI tool integration?
- Enhances Data Security
- Improves Data Governance
- Increases Integration Complexity
- Simplifies Data Access
Data Federation simplifies BI tool integration by providing a unified view of data from different sources. It eases data access and analysis, reducing the complexity associated with integrating diverse datasets.
The _______ design pattern is used to define an interface for creating an object, but let subclasses alter the type of objects that will be created.
- Abstract Factory
- Builder
- Factory
- Prototype
The Factory design pattern is used to define an interface for creating an object, but let subclasses alter the type of objects that will be created. It provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
In a large project with multiple teams, which Git workflow would you recommend and why?
- Centralized Workflow
- Feature Branch Workflow
- GitHub Flow
- Gitflow
In a large project with multiple teams, Gitflow is a recommended workflow. It provides a structured approach with dedicated branches for features, releases, and hotfixes, facilitating collaboration and maintaining a stable master branch. This helps manage complex projects efficiently.
The CSS flexbox layout model is used for _______ layout.
- Fixed
- Flexible
- Fluid
- Responsive
The CSS flexbox layout model is used for Flexible layout. It allows you to design a flexible and efficient way to distribute space and align items within a container.
In a RESTful API, a client sends a request to update a resource, but the request payload is missing a required field. How would you handle this situation?
- Dynamically generate the missing field
- Ignore the missing field and proceed with the update
- Return a 400 Bad Request response
- Return a 422 Unprocessable Entity response
In a RESTful API, when a client sends a request with a missing required field, it's appropriate to return a 400 Bad Request response. This informs the client about the error and the missing data, allowing them to correct the request.
During a project, two developers accidentally work on the same file and create a conflict during merging. How would you resolve this conflict in Git?
- Manually resolve conflicts using a text editor
- git merge --abort
- git rebase --continue
- git reset --hard
To resolve conflicts in Git, you would manually resolve them using a text editor. After resolving conflicts, you continue the merge process. This ensures that conflicts are addressed, and changes are integrated properly.
Which factors should be considered during query optimization to improve performance?
- Data encryption and security measures
- Indexing, table structure, and join conditions
- Query length, formatting, and indentation
- Server capacity and network speed
During query optimization, factors like indexing, table structure, and join conditions play a crucial role in improving performance. Optimizing these aspects enhances the efficiency of data retrieval and processing.
What does API stand for in RESTful APIs?
- Advanced Programming Interface
- Application Programming Interface
- Application Protocol Interface
- Automated Programming Interface
API stands for Application Programming Interface. It is a set of rules and tools that allows different software applications to communicate with each other. In the context of RESTful APIs, it facilitates communication between clients and servers.