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1. (20 pts.) Consider the following C program. Assume that all functions complete successfully. Complete the Process Model, given that the process ids (pids) are as shown for each process created. Fill in the boxes for each variable, p1 and p2, showing how the values change in each process. Just cross out old values (dont erase). int main ) Process Model int p1 = o, p2-0; pl-fork ) if (pl !# 0) p2 fork ( ); if (plp2 0) printf (A) fflush (stdout) if (pl0) printf (B); fflush (stdout) if (p20) printf (C) fflush (stdout) return 0 pid 123 pl p2 pl p2 pl p2 Which of the following are possible outputs? (Circle all that apply) pid 124 pid 125 a. ACABC b. AACCB c. BACCA d. AABCC e. ABACC Write a single command to kill all three processes shown in the Process Graph:
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Answer #1

Answer : [c] / [d] / [e]
Reason :
Number of times code executed is equal to number of process created.
Total Number of Processes = 2^n where n is number of fork system calls.
= 2^2
= 4
  
  
fork (); // Line 3
fork (); // Line 4
L1 // There will be 1 child process created by line 1.
/ \   
L2 L2 // There will be 2 child processes created by line 2
  
-----------------------------------------------------------------------

[2]
  
kill -9 123 124 125

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