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GO Classes DPP | GATE CS | Operating System | Multithreading

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2 2 votes

Consider the following statements about processes and threads. Which of them is/are correct?

  1. Using multiple threads can allow a process to continue performing useful work while one thread waits for a long-latency operation.
     
  2. A multithreaded program is useful only when it runs on a multiprocessor system.
     
  3. Thread management should always be performed entirely in user space because kernel-supported threads provide no significant advantage.
     
  4. A multithreaded server can be organised using a dispatcher thread and multiple worker threads to receive and process requests.

1 Answer

1 1 vote

Statement A is correct.
While one thread waits for I/O or communication, another ready thread may perform useful work.

Statement B is incorrect.
Threads can improve responsiveness and overlap I/O with computation even on a single-core system.
A single core provides concurrency through interleaved execution, although it cannot provide simultaneous parallel execution.

Statement C is incorrect.
User-level threads may have lower management overhead, but kernel-level threads allow independent kernel scheduling and true parallel execution on multiple cores.

Statement D is correct.
Dispatcher and worker-thread structures are commonly used to divide request acceptance from request processing.

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