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OS Chp 1 & 2

memorize.ai (lvl 286)

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Section 1

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IBM's CP/CMS and VM/370, early seventies

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Cards (21)

Section 1

(21 cards)

IBM's CP/CMS and VM/370, early seventies

Front

Which early systems implement virtual machines? Roughly, when?

Back

single-tasking OS

Front

ex. MS-DOS single memory space, no process created

Back

user mode

Front

only a subset of machine instructions available, instructions that control the

Back

1. shield the user from the complexity of the underlaying hardware 2. allocate resources to competing users

Front

2 general tasks of O/S

Back

modes

Front

what particular software has access to

Back

Storage management

Front

Creating and deleting files and directories Backup files on to stable (non-volatile) storage media

Back

Who created UNIX? When?

Front

Ken Thompson, 1971

Back

OS system hierarchy

Front

Back

system calls

Front

fork() exit() open() getpid() wait() sleep() close() write() chmod() exec() execvp()

Back

Where is the OS in the system hierarchy?

Front

above the firmware below the interface

Back

Who created Linux?

Front

Linus Torvalds, 1991

Back

In diagram Chp 2 Slide 4, where does system call fit in?

Front

from top to bottom: user and other system programs user interfaces system calls services operating system hardware

Back

I/O Subsystem

Front

Memory management of I/O including buffering,

Back

Process management

Front

Creating and deleting user and system processes Suspending and resuming processes Providing mechanisms for deadlock handling

Back

Memory management

Front

To execute a program all of the instructions must be in memory Determines what is in memory and when (which pasts of memory are currently being used and by whom

Back

difference between single-tasking and multi-tasking

Front

creation of different processes

Back

Where does the OS reside before the system is booted?

Front

On disk

Back

Who is credited for first windowing systems?

Front

Doug Englebart, 70's

Back

kernel mode

Front

OS runs in this, access to all the hardware, can execute all machine instructions

Back

multi-tasking OS

Front

shell executes fork(), exec() to load program into process, shell waits for process to terminate or continues with user commands

Back

5 subsystems of OS

Front

Process Management Memory Management Storage Management I/O Subsystem Security and Protection

Back