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Distributed System

Scenario​

We are designing a distributed e-learning system across multiple servers. The system consists of frontend services to handle client requests (for example, when a client accesses https://curs.upb.ro) and backend services for information storage.

Respond to the following questions with "True" or "False" and provide reasoning for each answer. The explanation should be concise, 2-3 sentences for each response.

Questions​

  1. The backend service will benefit from the use of buffer cache. Answer: True

  2. The frontend application must necessarily be multi-threaded. Answer: False

  3. Both components (frontend and backend) are I/O intensive. Answer: True

  4. Communication between backend services on different servers can be achieved through shared memory. Answer: False

  5. If a backend service becomes unavailable, the entire system becomes unusable. Answer: False

  6. The frontend service predominantly uses socket file descriptors, while backend services predominantly use file descriptors. Answer: True

  7. Both types of services need to run on a UNIX-based operating system (Linux, FreeBSD). Answer: False

  8. Exclusive access primitives are needed for communication between frontend and backend. Answer: False

  9. A higher processor load is expected for the frontend compared to the backend. Answer: False

  10. SSD storage is required for the frontend service. Answer: False

  11. The backend service uses a lot of memory - almost the entire system memory. Answer: True