Which directory is used for variable data such as database files and log files?

• A. /tmp
• B. /etc
• C. /var
• D. /var/log

Answer: (C)

Variable data refers to files that grow or change over time. The directory that holds this kind of data is /var, which is designated for files that accumulate, such as log files, databases, mail spools, and cache data. Logs live under /var/log, which is a subdirectory of /var, illustrating how /var serves as the broad category for data that varies in size and content. In contrast, /tmp is for temporary files that may be cleaned up, /etc contains static configuration files, and /var/log is specifically for logs rather than the entire set of variable data. Therefore, the best fit for variable data like database and log files is /var.