Question: Write a C or C + + program on Linux / Unix that creates a child process that prints agreeting, sleeps for 2 0 seconds,

Write a C or C

+ +

program on Linux

/

Unix that creates a child process that prints agreeting, sleeps for

20

seconds, then exits. The parent process should print a greetingbefore creating the child, and another after the child has terminated. It should thenterminate.

(15

points

) 3 .

What is the difference among algorithms, programs, and processes?

(15

points

) 4 .

What is the difference between a classic process and a thread?

(30

points

) 5 .

Please work on the following programming question:The program first creates a child process CP

.

,

there are two processes:The parent process does the following:a

.

compute the sum of all the even numbers from

1, 2, . . 1000,

and output this sum;b

.

wait for the termination of the child process CP

,

then terminate;The child process does the following:a

.

compute the sum of all the odd numbers from

1, 2, . . 1000,

and output this sum;b

.

terminates

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