Question 1

A parent process calling___________system call will be suspended until children processes terminate.

Accepted Answer

The wait system call allows a parent process to wait until one of its child processes terminates. Fork is used to create a new process, exit is called by a process to terminate itself, and exec is used to run a new program in the process's memory space.

Question 2

Cascading termination refers to termination of all child processes before the parent terminates___________

Accepted Answer

Cascading termination refers to the termination of all child processes before the parent terminates, regardless of whether the parent terminates normally or abnormally.

Question 3

In UNIX, each process is identified by its

Accepted Answer

In UNIX, each process is identified by its Process Identifier (PID), which is a unique number assigned to a process when it is created.

Question 4

The child process can___________

Accepted Answer

The child process can be a duplicate of the parent process. This is typically achieved through a system call like fork() in UNIX/Linux systems, where the child process starts as a copy of the parent process's address space.

Question 5

The child process completes execution, but the parent keeps executing, then the child process is known as___________

Accepted Answer

When a child process completes execution but the parent process is still running, and it has not yet read the status of its child, the child process is known as a zombie process. This means the child is technically "dead" as it has completed execution, but it still has an entry in the process table to allow the parent process to read its exit status.

Question 6

What is Inter process communication?

Accepted Answer

Inter-process communication (IPC) allows processes to communicate and synchronize their actions without using the same address space, enabling data exchange and coordination among different processes in a multitasking environment.

Question 7

Message passing system allows processes to___________

Accepted Answer

Message passing systems enable processes to communicate without using shared data, allowing for data exchange through messages instead.

Question 8

Which of the following two operations are provided by the IPC facility?

Accepted Answer

The IPC (Inter-Process Communication) facility provides operations to send and receive messages between processes.

Question 9

Messages sent by a process___________

Accepted Answer

Messages sent by a process can be designed to be either fixed or variable sized depending on the communication protocol or system requirements. This flexibility allows for efficient communication tailored to the specific needs of the application. Fixed-size messages simplify the design of the communication system, while variable-size messages can be more efficient for transmitting data of varying lengths.

Question 10

The link between two processes P and Q to send and receive messages is called

Accepted Answer

The answer of The link between two processes P and...

Question 11

Which of the following are TRUE for direct communication?

Accepted Answer

In direct communication, each communication link is associated with exactly two processes. This means that for two processes to communicate, there must be a direct link between them, and this link is dedicated to their communication alone.

Question 12

In indirect communication between

Accepted Answer

In indirect communication, a mailbox or message queue is used to facilitate communication between processes, allowing them to send and receive messages indirectly through this intermediary.

Question 13

In the non blocking send___________

Accepted Answer

In a non-blocking send operation, the sending process sends the message and immediately resumes its operation without waiting for the message to be received by the destination process.

Question 14

In the Zero capacity queue___________

Accepted Answer

In a zero capacity queue, the sender must block until the receiver is ready to receive the message, as there is no buffer space to hold messages in the queue.

Question 15

The Zero Capacity queue___________

Accepted Answer

A Zero Capacity queue, by definition, has no space for buffering messages. It means that if the receiver is not ready to accept a message, the message cannot be queued and must either be discarded or the sender must wait.

Question 16

Concurrent access to shared data may result in___________

Accepted Answer

Concurrent access to shared data without proper synchronization leads to data inconsistency, as multiple processes may try to modify the data simultaneously, resulting in unpredictable outcomes.

Question 17

A situation where several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which access takes place is called___________

Accepted Answer

A race condition occurs when multiple processes or threads access and manipulate the same data concurrently, and the outcome depends on the non-deterministic ordering of their execution. This can lead to unpredictable results if not properly managed.

Question 18

The segment of code in which the process may change common variables, update tables, write into files is known as___________

Accepted Answer

The critical section refers to the part of a computer program or system where the shared resources (like global variables, files, etc.) are accessed and modified. Ensuring that only one process or thread accesses the critical section at a time is crucial for preventing race conditions and ensuring data consistency.

Question 19

Which of the following conditions must be satisfied to solve the critical section problem?

Accepted Answer

The critical section problem requires all three conditions: mutual exclusion, progress, and bounded waiting, to ensure proper synchronization in concurrent processes.

Question 20

Mutual exclusion implies that

Accepted Answer

Mutual exclusion in the context of concurrent programming ensures that when one process is executing in its critical section, no other process is allowed to execute in their critical section. This prevents race conditions and ensures data consistency.

Quiz 11: Process Management and Interprocess Communication in Unix