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Questions and Answers
Which of the following flags represents the permission to read content?
Which of the following flags represents the permission to read content?
What does the flag PROT_WRITE allow a process to do?
What does the flag PROT_WRITE allow a process to do?
Which combination provides no permissions at all?
Which combination provides no permissions at all?
If a process has PROT_EXEC permission, what can it do?
If a process has PROT_EXEC permission, what can it do?
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Which flags can be combined to grant both read and write permissions?
Which flags can be combined to grant both read and write permissions?
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What does the bounded buffer primarily illustrate in computer science?
What does the bounded buffer primarily illustrate in computer science?
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Which of the following statements is true regarding a bounded buffer?
Which of the following statements is true regarding a bounded buffer?
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In the context of the bounded buffer, which of the following roles do processes typically play?
In the context of the bounded buffer, which of the following roles do processes typically play?
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What is a potential issue that could arise from using a bounded buffer?
What is a potential issue that could arise from using a bounded buffer?
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Why is shared memory important in the context of bounded buffers?
Why is shared memory important in the context of bounded buffers?
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What is the primary function of a parent in a parent-child relationship regarding process communication?
What is the primary function of a parent in a parent-child relationship regarding process communication?
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What is a characteristic of ordinary pipes used in process communication?
What is a characteristic of ordinary pipes used in process communication?
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How many pipes are needed for two-way communication between a parent and its child process?
How many pipes are needed for two-way communication between a parent and its child process?
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In the context of pipes in process control, what does 'unidirectional' imply?
In the context of pipes in process control, what does 'unidirectional' imply?
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Which of the following statements is true regarding pipe creation in process communication?
Which of the following statements is true regarding pipe creation in process communication?
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What is the return value of a successful operation for the write end of a pipe?
What is the return value of a successful operation for the write end of a pipe?
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What does a return value of -1 indicate when working with the write end of a pipe?
What does a return value of -1 indicate when working with the write end of a pipe?
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Which of the following statements about the write end of a pipe is true?
Which of the following statements about the write end of a pipe is true?
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What happens if there is an error when interacting with the write end of a pipe?
What happens if there is an error when interacting with the write end of a pipe?
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What is the significance of the file descriptor fd in the context of the write end of a pipe?
What is the significance of the file descriptor fd in the context of the write end of a pipe?
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How do ordinary pipes on Windows systems compare with those on UNIX systems?
How do ordinary pipes on Windows systems compare with those on UNIX systems?
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What is the primary role of the producer in a pipe communication model?
What is the primary role of the producer in a pipe communication model?
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Which of the following is true about the close operation in pipe communication?
Which of the following is true about the close operation in pipe communication?
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In the context of ordinary pipes, which of the following statements is correct?
In the context of ordinary pipes, which of the following statements is correct?
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What role does the consumer play in the pipe communication model?
What role does the consumer play in the pipe communication model?
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Which file descriptor is typically associated with the write end of a pipe?
Which file descriptor is typically associated with the write end of a pipe?
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In the given context, what is the purpose of the command close(fd) in the pipe communication?
In the given context, what is the purpose of the command close(fd) in the pipe communication?
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Why should both the parent and child processes close their unused ends of the pipe?
Why should both the parent and child processes close their unused ends of the pipe?
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What is a characteristic of the message written by the producer in the pipe example?
What is a characteristic of the message written by the producer in the pipe example?
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When is the read end of the pipe typically utilized?
When is the read end of the pipe typically utilized?
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Study Notes
Interprocess Communication
-
Bounded Buffer: A shared memory mechanism that uses a buffer with limited size to facilitate communication between processes.
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Parent-Child Relationship: A parent process can create a child process to enable communication through a pipe (unidirectional).
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Ordinary Pipes:
- Unidirectional pipes are used for one-way communication.
- Windows Systems: Referred to as "anonymous pipes" with similar behavior.
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Two-Way Communication:
- Requires using two pipes, each sending data in one direction.
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Producer-Consumer Model:
- Producer writes to the write-end of the pipe.
- Consumer reads from the read-end.
- The unused ends of the pipe are closed by both processes. ### Example Code with Buffer Size
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Buffer Size:
BUFFER SIZE- Constant for the buffer capacity. -
Read End:
READ END- Represents the read-end of the pipe. -
Write End:
WRITE END- Represents the write-end of the pipe. -
pipe():- Attempts to create an unnamed pipe.
- Returns 0 on success.
- Returns -1 on error.
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Example Code Structure (Parent Process):
- Parent Process (producer) writes data (e.g., "Greetings") to the write-end of the pipe.
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Example Code Structure (Child Process):
- Child Process (consumer) reads data from the read-end of the pipe.
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Closing Unused Ends:
- Both parent and child processes close their unused ends of the pipe (
close(fd)).
- Both parent and child processes close their unused ends of the pipe (
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Description
This quiz covers essential concepts of interprocess communication, including the bounded buffer, parent-child relationship, and ordinary pipes. Dive into the producer-consumer model and understand how two-way communication is implemented in various systems. Test your knowledge with example code related to buffer sizes and pipe ends.
