In this article, you will get NPTEL Assignment Answers of Week 4 (2023) of the course Operating System Fundamentals
Week 4 Due date: 2023-08-23, 23:59 IST.
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Note : Answers are marked with red color.
1.Choose the false statement.
(A) The wait() system call blocks the parent process until one of its child processes exits.
(B) The wait() system call helps a child process to return its exit status value to the parent process.
(C) The wait() system call reclaims resources that were used by the child process.
(D) The wait() system call returns a negative value to the OS if the child process is abnormally terminated.
(E) The wait() system call returns a zero value to the OS if the child process is normally terminated.
2. In the UNIX environment. the output of the following program is a
(A) orphan child process.
(B) zombie child process.
(C) blocked child process.
(D) aborted child process.
(E) aborted parent process.
3. In UNIX Operating System (OS), an orphan process is a computer process
(A) whose parent process has finished, but it is running.
(B) that is adopted by the “init” process.
(C) whose parent process returns all the resources to the OS.
(D) whose process id is unique.
(E) All of the above
4. A process terminates when
(A) it attempts to access a memory location to which access is not permitted.
(B) its parent process request to terminate it.
(C) it executes an illegal instruction.
(D) it exceeds the waiting time for an event to occur for which the process is waiting.
(E) All of the above.
5. The objective of Interprocess Communication (IPC) is to
(A) share data among the processes.
(B) communicate among multiple processes.
(C) solve a large problem with the help of multiple cooperating processes.
(D) synchronize the activities of multiple cooperating processes.
(E) All of the above.
6. Message-passing interprocess communication allows multiple cooperating processes
(A) to exchange information without the kemel.
(B) to synchronize their actions without sharing the same address space.
(C) to communicate by sharing the same address space.
(D) which must be run in the same computer system.
(E) using the fork() system call.
7. Shared-memory interprocess communication
(A) can be done at memory speed.
(B) allows multiple processes to exchange information via kernel.
(C) does not need process synchronization.
(D) Does not need a shared region of memory.
(E) supports delete() and receive() operations.
8. In indirect interprocess communication between two processes, which of the following are two valid operations
(A) deleteQ) and add().
(B) send() and receive().
(C) delete(Q) and send().
(D) add() and receive()
(E) open() and close().
9. In direct interprocess communication between two processes, a communication link is
(A) only bidirectional.
(B) only unidirectional.
(C) established only if processes share a common mailbox.
(D) may be associated with many processes.
(E) is associated with exactly one pair of communicating processes
10. In the non-blocking (asynchronous) message-passing. the sending process
(A) keeps sending until the receiving process receives the message.
(B) sends the message and resumes operation.
(C) keeps sending until it receives a message from another process.
(D)retrieves either a valid message or a null.
(E) is blocked until the message is received by the receiving process.
11. The pipe() system call
(A)is used for one-way communication of a stream of bytes.
(B) is used for two-way communication of a stream of bytes.
(C) creates three file descriptors.
(D) created a structured file.
(E) uses nonblocking I/O operation.
12. A multicore system
(A) supports multithreading.
(B) multiple threads can execute concurently.
(C) improves system performance through multithreading.
(D) sharing resources mong threads is easier than shared memory.
(E) All of the above.
13. Which of the following statements is true?
(A) Threading increasing the throughput of the system.
(B) Resource sharing among threads is easier than the same among processes.
(C) Multiple threads share common address space.
(D) Thread communication is easier than interprocess sommunication.
(E) Alll of the above.
14. Which of the following system calls is not supported by the Unix operating stsem?
(A) abort()
(B) wait()
(C)piped.
(D)sleep()
(E) CreateProcess()
15. In direct or indrect interprocess communication
(A) messages are stored in a temporary buffer.
(B) none of the messages are waiting in a zero capacity buffer.
(C) the sender is blocked for the bounded capacity buffer if it is full.
(D) the sender is not blocked for the unbounded capacity buffer.
(E) All of the above.
