Which term describes the accessibility of data when needed?

• A. Data latency
• B. Data redundancy
• C. Data accuracy
• D. Data availability

Answer: (D)

Data availability is about whether data can be accessed when it’s needed. It describes the system’s ability to provide access to data to users or applications, even during outages or maintenance, and is often measured by uptime and service levels. Latency, by contrast, deals with the delay before data begins to arrive after a request. Data redundancy focuses on having duplicate copies of data to prevent loss, which helps maintain availability but isn’t the act of being accessible itself. Data accuracy concerns whether the data is correct, not whether it can be reached. So the term that best captures accessibility of data when needed is data availability.