OSOperating Systems Learning StudioGuided notes + mapped practice
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Services vs System Calls: Quick Differentiator

⚠️ Added for clarity (not directly from source)

  • - OS service is a broad capability (for example, file management).
  • - System call is a concrete kernel entry point used to access that service (for example, open/read/write).
  • - In answers, first state service category, then one specific system call example.
  • - Visual explanation: Service is the department; system call is the token number at that department counter.