Chapter 2

Question 1

RTE

Answer 1

Run-time Environment

Question 2

System-call interface

Question 3

RTE -> System-call Interface

Answer 3

The RTE proves a system-call interface that serves as the link to system calls made available by the os.

Question 4

How many types of system calls

Answer 4

Six

Question 5

System call types

Answer 5

• Process control
• File management
• Device management
• Information maintenance
• Communications
• Protection

Question 6

Process Control

Answer 6

• Create, terminate process
• load, execute
• get/set process attributes
• wait event, signal event
• allocate and free memory

Question 7

File management

Answer 7

• create, delete file
• open, close
  read, write, reposition

Question 8

Strace

Answer 8

Available on Linux sytems, lists each system call as it is executed.

Question 9

Two common models of interprocess communication

Answer 9

• Message-passing model
• Shared-memory model

Question 10

Message-passing model

Answer 10

The communicating processes exchange messages with one another to transfer information

Question 11

Deamons

Question 12

Shared Memory Model

Answer 12

Processes use shared_memory_create() and shared_memory_attach() system calls to create and gain access to regions of memory owned by other processes.

Question 13

Computer Hierarchy

Answer 13

hardware, OS, system services, Application programs.

Question 14

System services (system utilities)

Answer 14

Provide a convenient environment for program development and execution.

Question 15

Deamons, Services, subsystems

Answer 15

Constantly running system-program processes.

Question 16

Interpreters, RTE, and binary executable files

Answer 16

Available to be able to run programs on different computers which have different system calls or APIs