Consider the following interrupt protection levels in Linux, and arrange them in the increasing order of their priorities.
A. User-Mode Programs (Preemptible)
B. Bottom Half Interrupt Handlers
C. Top Half Interrupt Handlers
D. Kernel System Service Routines (Preemptible)
Choose the correct answer from the options given below:
Pick an option to check yourself, or open the answer below.
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Correct answer: D. A → D → B → C
Explanation
Linux interrupt protection levels from lowest to highest priority: user-mode programs, kernel system-service routines, bottom-half interrupt handlers, top-half interrupt handlers. So A → D → B → C.More System Software and Operating System questions
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