What are Application Pools in IIS 7.0 and why are they important?

• A. They provide database connection pooling.
• B. They manage FTP services.
• C. They isolate web apps into separate worker processes, improving stability, security, and resource management.
• D. They provide load balancing.

Answer: (C)

Application Pools in IIS 7.0 isolate web applications by running them in separate worker processes. Each pool gets its own process and memory space, so if one application misbehaves, leaks memory, or crashes, it doesn’t affect others running in different pools. This separation improves stability because failures are contained, enhances security by allowing different pools to run under different identities and with tighter permissions, and helps with resource management since you can set limits, recycling schedules, and CPU usage per pool. In short, they let you host multiple apps on one server safely and efficiently.

The other options don’t fit because database connection pooling is handled by data providers, not IIS application pools; managing FTP services is outside the scope of application pools; and load balancing is provided by separate components or features, not by application pools.