003.03.93.Interview-Questions-Process-Duplication - EmbLogic

20. Efficient Process Creation

pravjot — Wed, 29 May 2024 22:52:38 +0530

20. Efficient Process Creation

How do the kernel mechanisms for managing address space during `fork()` contribute to efficient process creation? Discuss the roles of `mm_struct`, `vm_area_struct`, `dup_mmap`, and `handle_pte_fault`.

19. Memory Segment Attributes and Behavior

pravjot — Wed, 29 May 2024 22:52:25 +0530

19. Memory Segment Attributes and Behavior

Compare the attributes and behaviors of the text, data, heap, and stack segments during the `fork()` system call. Why are these segments handled differently?

18. Page Fault Handling for Copy-on-Write

pravjot — Wed, 29 May 2024 22:52:11 +0530

18. Page Fault Handling for Copy-on-Write

What happens when a process attempts to write to a shared page marked as read-only during the `fork()` operation? Describe the role of the `handle_pte_fault` function in this scenario.

17. Function `dup_mmap` in Copying Address Space

pravjot — Wed, 29 May 2024 22:44:55 +0530

17. Function `dup_mmap` in Copying Address Space

Explain the purpose of the `dup_mmap` function in the `fork()` system call. How does it contribute to copying the parent’s address space to the child?

16. Virtual Memory Area (`vm_area_struct`)

pravjot — Wed, 29 May 2024 22:44:42 +0530

16. Virtual Memory Area (`vm_area_struct`)

Describe the `vm_area_struct` and its significance in the context of the `fork()` system call. What key information does it contain?

15. Role of `mm_struct` in Address Space Management

pravjot — Wed, 29 May 2024 22:44:27 +0530

15. Role of `mm_struct` in Address Space Management

What is the `mm_struct` and what role does it play in managing a process's address space during the `fork()` system call?

14. Stack Segment Duplication

pravjot — Wed, 29 May 2024 22:38:58 +0530

14. Stack Segment Duplication

What steps does the kernel take to ensure that each process has its own independent stack segment after a `fork()` system call?

13. Heap Segment Copy-on-Write Mechanism

pravjot — Wed, 29 May 2024 22:38:44 +0530

13. Heap Segment Copy-on-Write Mechanism

How does the kernel handle the heap segment during the `fork()` system call? Explain the role of copy-on-write in managing the heap segment.

12. Data Segment and Copy-on-Write

pravjot — Wed, 29 May 2024 22:38:32 +0530

12. Data Segment and Copy-on-Write

Describe the behavior of the data segment during `fork()`. How does the copy-on-write mechanism work for this segment?

11. Text Segment Sharing

pravjot — Wed, 29 May 2024 22:35:43 +0530

11. Text Segment Sharing

Explain how the text segment is handled during the `fork()` system call. Why is it shared between the parent and child processes?

10. Returning to User Space

pravjot — Wed, 29 May 2024 22:35:29 +0530

10. Returning to User Space

What steps does the kernel take to return control to user space after the `fork()` system call? What are the return values for the parent and child processes?

9. Adding Child Process to Scheduler’s Run Queue

pravjot — Wed, 29 May 2024 22:35:17 +0530

9. Adding Child Process to Scheduler’s Run Queue

Describe the process of adding the newly created child process to the scheduler’s run queue. What role does the scheduler play in process execution?

8. Assigning Unique PID

pravjot — Wed, 29 May 2024 22:32:44 +0530

8. Assigning Unique PID

How does the kernel assign a unique PID to the child process during `fork()`? Describe the function responsible for this task.

7. Copy-on-Write Mechanism Setup

pravjot — Wed, 29 May 2024 22:32:32 +0530

7. Copy-on-Write Mechanism Setup

Explain how the copy-on-write mechanism is set up during the `fork()` system call. Why is this mechanism important for process efficiency?

6. Copying Parent’s Context

pravjot — Wed, 29 May 2024 22:32:17 +0530

6. Copying Parent’s Context

Detail the steps involved in copying the parent’s process context to the child process during the `fork()` system call.

5. Allocating Process Control Block (PCB)

pravjot — Mon, 27 May 2024 10:44:34 +0530

5. Allocating Process Control Block (PCB)

How does the kernel allocate a new `task_struct` for the child process during `fork()`? What information is contained in the `task_struct`?

4. Kernel Function Execution: `do_fork()`

pravjot — Mon, 27 May 2024 10:36:55 +0530

4. Kernel Function Execution: `do_fork()`

What is the purpose of the `do_fork()` function in the kernel, and what key tasks does it perform during process creation?

3. System Call Handler Role

pravjot — Mon, 27 May 2024 10:36:33 +0530

3. System Call Handler Role

Describe the role of the system call handler in the `fork()` system call. How does it interact with the system call table?

2. System Call Invocation

pravjot — Mon, 27 May 2024 10:36:01 +0530

2. System Call Invocation

What happens during the system call invocation phase when `fork()` is called? Which specific CPU instruction is typically used for this transition?

1. User Space to Kernel Space Transition

pravjot — Mon, 27 May 2024 10:08:44 +0530

1. User Space to Kernel Space Transition

Explain the transition from user space to kernel space when a process calls `fork()`. Why is this transition necessary?