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for (i = 0; i < n; i ++) fork ( )
The code given above is executed in a process. The total number of child processes created in that particular process is
- a)2n
- b)2n - 1
- c)2n - 1 Correct Answer.
- d)n
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
for (i = 0; i < n; i ++) fork ( )The code given above is executed i...
Understanding Fork in Processes
In the given code snippet, `for (i = 0; i < n;="" i++)="" fork();`,="" a="" loop="" is="" used="" to="" create="" child="" processes="" using="" the="" `fork()`="" system="" call.="" each="" call="" to="" `fork()`="" creates="" a="" new="" />
How Fork Works
- When a process calls `fork()`, it creates a duplicate of itself.
- The original process is referred to as the parent, and the new process is the child.
- Each child process can also call `fork()`, leading to exponential growth in the number of processes.
Process Creation Analysis
- In the first iteration (i=0), the parent creates 1 child process.
- In the second iteration (i=1), both the parent and the first child process call `fork()`, resulting in 2 new processes (1 from the parent and 1 from the child).
- This pattern continues for n iterations.
Calculating Total Processes
- After n iterations, the total number of processes can be calculated as follows:
- 1 (initial parent) + 2^1 + 2^2 + ... + 2^(n-1)
- This results in a total of 2^n processes.
However, since we are interested in the number of child processes created (not including the original parent), the number of child processes is:
- Total processes (2^n) - 1 (the original parent process) = 2^n - 1
Conclusion
Thus, the correct answer to the number of child processes created is:
- Option C: 2^n - 1
In the given code snippet, `for (i = 0; i < n;="" i++)="" fork();`,="" a="" loop="" is="" used="" to="" create="" child="" processes="" using="" the="" `fork()`="" system="" call.="" each="" call="" to="" `fork()`="" creates="" a="" new="" />
How Fork Works
- When a process calls `fork()`, it creates a duplicate of itself.
- The original process is referred to as the parent, and the new process is the child.
- Each child process can also call `fork()`, leading to exponential growth in the number of processes.
Process Creation Analysis
- In the first iteration (i=0), the parent creates 1 child process.
- In the second iteration (i=1), both the parent and the first child process call `fork()`, resulting in 2 new processes (1 from the parent and 1 from the child).
- This pattern continues for n iterations.
Calculating Total Processes
- After n iterations, the total number of processes can be calculated as follows:
- 1 (initial parent) + 2^1 + 2^2 + ... + 2^(n-1)
- This results in a total of 2^n processes.
However, since we are interested in the number of child processes created (not including the original parent), the number of child processes is:
- Total processes (2^n) - 1 (the original parent process) = 2^n - 1
Conclusion
Thus, the correct answer to the number of child processes created is:
- Option C: 2^n - 1
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Community Answer
for (i = 0; i < n; i ++) fork ( )The code given above is executed i...
A fork () call creates the child processes for the following loop:
It creates 2n - 1 child processes, excluding the parent process.
It creates 2n - 1 child processes, excluding the parent process.
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for (i = 0; i < n; i ++) fork ( )The code given above is executed in a process. The total number of child processes created in that particular process isa)2nb)2n - 1c)2n - 1 Correct Answer.d)nCorrect answer is option 'C'. Can you explain this answer?
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