What are differences between SRAM and DRAM? (Architecture)
Static RAM will store data with changed once. During this process, RAM doesn’t need to be recharged to keep data alive. In dynamic RAM, chips need to be periodically refreshed in order to keep data alive.
How to define hierarchy levels of modern unix-like system?
From the bottom to top, modern unix-like system has four parts: Kernel, Shell, Filesystem and users' application.
What's the most differences between static and dynamic linking in compilation?
Static compilation will contain linked library in new generated program which can be invoke inside your program. Dynamic linking will leave a search space in your program. When you running your program, it will search libraries in defined searching space and link it at runtime.