MongoDB is an example of a _______ database.
- Document-oriented
- Graph
- Key-value
- Relational
MongoDB is an example of a document-oriented database. It stores data in flexible, JSON-like documents, making it suitable for a variety of data models.
How does the query execution plan contribute to query optimization?
- It automatically optimizes queries
- It helps in organizing query execution steps
- It only displays results
- It reduces the number of tables in a query
The query execution plan organizes the steps for executing a query, helping to optimize performance. It provides insights into how the database engine will access tables and process data, aiding developers in fine-tuning queries.
A unique constraint ensures that _______ values are stored in a column.
- Duplicate
- Incremental
- Null
- Unique
A unique constraint ensures that unique values are stored in a column, preventing the insertion of duplicate values. It helps maintain data integrity by enforcing uniqueness.
You're working on a team project where multiple developers are contributing code. Describe how you would use OOP concepts like encapsulation and abstraction to ensure code integrity and modularity.
- Abstraction for security and Encapsulation for modularity
- Encapsulation to hide internal details and Abstraction to reduce complexity
- Inheritance for code sharing and Polymorphism for flexibility
- Inheritance for encapsulation and Polymorphism for modularity
Encapsulation hides the internal details of a class, ensuring code integrity, while Abstraction reduces complexity by providing a simplified interface. This combination enhances code modularity in a collaborative development environment.
Normalization helps reduce _______ and dependency issues in a database.
- Performance
- Redundancy
- Scalability
- Security
Normalization helps reduce Redundancy in a database by organizing data to eliminate duplicate entries. It also addresses dependency issues.
Your application requires flexible schemas and the ability to store hierarchical data. Which NoSQL database would you recommend and why?
- Cassandra
- MongoDB
- Neo4j
- Redis
MongoDB is a document-oriented NoSQL database that supports flexible schemas and is well-suited for storing hierarchical data. Its BSON (Binary JSON) format allows for efficient representation of complex structures.
What is the purpose of caching strategies in web applications?
- Adding security layers to web applications
- Designing user interfaces
- Enhancing performance and reducing server load
- Managing user authentication
Caching strategies in web applications serve the purpose of enhancing performance and reducing server load. They involve decisions on what to cache, when to expire cache, and how to handle dynamic content.
Collaborative code review is an essential feature of _______ platforms, enabling developers to provide feedback on each other's code changes.
- Code Hosting
- Continuous Integration (CI)
- Integrated Development Environment (IDE)
- Version Control System (VCS)
Collaborative code review is an essential feature of Code Hosting platforms, enabling developers to provide feedback on each other's code changes. This process helps maintain code quality and catch potential issues early.
What is normalization in the context of relational databases?
- Process of adding data to a database
- Process of deleting unnecessary data
- Process of organizing data to reduce redundancy and dependency
- Process of updating database schema
Normalization in the context of relational databases is the process of organizing data to reduce redundancy and dependency, ensuring data integrity and minimizing data anomalies.
Browser Developer Tools allow you to simulate various _______ conditions for testing purposes.
- Network
- Device
- Security
- Performance
Browser Developer Tools allow you to simulate various device conditions for testing purposes. This includes options to emulate different devices, screen sizes, and resolutions for responsive design testing.