Lecture 5: Process 2

Question 1

3 parts of Child Process Management:

Answer 1

1. Resource Sharing: which resources are available to the child
2. Execution
3. Address Space

Question 2

fork ():

Answer 2

Creates a new child processes by creating a copy of executing process within a new address space.

Question 3

execv (path, argv):

Answer 3

Replaces the process memory space w/ specified program in path and arguments argv

Question 4

Independent Processes

Answer 4

Are not affected by the execution of other processes

Question 5

Interprocess Communication

Answer 5

exchange data and information (i.e Messaging, Shared memory

Question 6

Limited Modularity

Answer 6

Processes need to know each other’s pid (identifier)

-if the pid of a process changes then all references to that have to be examined again

Question 7

Less Desirable:

Answer 7

Hard-coded technique (where identifiers are explicitly stated).

Question 8

Indirect Communication

Answer 8

Messages directed and received from mailboxes (also referred to as ports.)

Question 9

Blocking is

Answer 9

Synchronous

• Send has sender blocked until message is received
• Receive has receiver blocked until message is available

Question 10

Non-Blocking is

Answer 10

Asynchronous

• Send has sender send message and continue
• Receive has receiver receive a valid message or null