Which HTTP method is commonly used to retrieve data from an API endpoint?
- DELETE (HTTP DELETE method)
- GET (HTTP GET method)
- POST (HTTP POST method)
- PUT (HTTP PUT method)
The HTTP GET method is commonly used to retrieve data from an API endpoint. When a client sends a GET request, it asks the server to retrieve a resource, such as information or data, from the specified URL or endpoint. This method is safe and idempotent, meaning it should not change the server's state and can be called repeatedly with the same result.
You are tasked with designing a Web API that will be used by several different client applications. What factors would you consider to ensure that your API is robust and easy to use?
- Avoid versioning your API and make frequent breaking changes
- Design a clear and consistent API structure with comprehensive documentation
- Limit the documentation to provide minimal information
- Use obscure and non-standard authentication methods
To ensure an API is robust and easy to use by multiple client applications, it's essential to design a clear and consistent API structure. This includes well-documented endpoints, standardized authentication, and versioning to avoid breaking changes. Using obscure authentication, minimal documentation, and frequent breaking changes would make the API less robust and challenging for clients to use.
By implementing API throttling, a server can serve a fixed number of requests per ____ , ensuring fair usage.
- Day
- Hour
- Minute
- Month
By implementing API throttling, a server can serve a fixed number of requests per minute, ensuring fair usage. This technique helps control traffic and prevent excessive usage that can overload the server.
What considerations should be taken into account when optimizing an API for a large number of simultaneous requests?
- Decrease the API's scalability.
- Ensure the API is stateful.
- Increase the API's response time.
- Use techniques like load balancing and caching.
When optimizing an API for a large number of simultaneous requests, it's essential to use techniques like load balancing and caching. Load balancing distributes incoming requests across multiple servers to prevent overload, and caching stores frequently requested data to reduce the load on the server and improve response times, making the API more scalable and responsive.
Which type of table in a data warehouse typically contains metrics and key performance indicators (KPIs)?
- Dimension Table
- Fact Table
- Index Table
- Lookup Table
The table in a data warehouse that typically contains metrics and key performance indicators (KPIs) is the Fact Table. Fact tables store numerical data related to business processes and events and serve as the core for data analysis and reporting in data warehousing.
In the realm of data visualization, which term refers to the use of geographic data to create maps that represent specific data points or trends?
- Data Patterning
- Geocoding
- Geospatial Visualization
- Topographical Mapping
Geospatial Visualization involves using geographic data to create maps that represent specific data points or trends. It allows the visualization of data in a geographical context, making it useful for location-based insights and decision-making.
Which OLAP operation involves reducing the dimensionality of a data cube by fixing one or more dimensions at a single value?
- Dice
- Drill-down
- Roll-up
- Slice
The OLAP operation that involves reducing the dimensionality of a data cube by fixing one or more dimensions at a single value is "Roll-up." This operation allows for aggregation or summarization of data, moving from lower-level detail to higher-level summaries, providing a more compact view of the cube.
An organization is assessing its IT risks and identifies a potential threat from an outdated software component. However, the business impact of this threat is deemed to be very low. What might be a suitable course of action?
- Develop a comprehensive risk mitigation strategy
- Monitor the situation and take no further action
- Prioritize the threat and allocate resources accordingly
- Replace the outdated software immediately
When a potential IT threat is identified, and its business impact is deemed to be very low, a suitable course of action is to monitor the situation and take no immediate action. It's essential to prioritize resources and efforts based on the level of risk and potential business impact. Replacing the software immediately or developing a comprehensive risk mitigation strategy may not be warranted for low-impact threats.
Real-time BI systems often rely on _______ to capture and process incoming data streams quickly.
- Data Cubes
- Data Warehouses
- ETL (Extract, Transform, Load)
- Stream Processing
Real-time Business Intelligence (BI) systems frequently use Stream Processing to capture and process incoming data streams quickly. Stream processing enables real-time analysis and decision-making by handling continuous data flows.
Which OLAP operation allows users to view more detailed data by navigating from a higher level of aggregation to a lower one?
- Dice
- Drill-down
- Roll-up
- Slice
The OLAP operation known as "Drill-down" allows users to navigate from a higher level of aggregation to a lower one, providing more detailed data. This is essential for exploring data hierarchies and gaining insights into specific elements within a broader context.