Mod 8 Day 1

Question 1

A program that provides the user command line interface CLI to the kernel

Answer 1

Shell

Question 2

An instance of a program in execution

Answer 2

Process

Question 3

contains the SCI and handles mapping between user request and device driver actions. It also manages system resources and perform system services

Answer 3

Kernel mode

Question 4

Computer programs used to perform certain tasks, functions, or activities and originated in user mode

Answer 4

User applications

Question 5

This mode includes processes such as shells, NIX commands, utility and user application programs

Answer 5

User mode

Question 6

An implementation of the standard C library used by many OS’s and programs on those systems

Answer 6

GNU C libraries (glibc)

Question 7

When memory is exhausted and pages of memory are moved onto the disc

Answer 7

Swapping

Question 8

A family of related standard specified by the IEEE that defines the API of a Unix OS

Answer 8

POSIX

PORTABLE OPERATING SYSTEM INTERFACE FOR UNIX

Question 9

Run in user mode on top of a single kernel thread and shares address space in system resources

Answer 9

Lightweight process

Question 10

A program that runs unobtrusively in the background rather than under the direct control of a user

Answer 10

Daemon

Question 11

This is a wrapper function for a Linux kernel system call

Answer 11

Library function

Question 12

A low-level program allowing the kernel to communicate with a particular piece of hardware

Answer 12

Device driver

Question 13

A catastrophic kernel crash that halts the entire PC

Answer 13

Kernel panic

Question 14

The applications that make the OS work (e.g. GUI, compilers, shell, tools, and editors)

Answer 14

Gnu software

Question 15

User-initiated processes may include

Answer 15

Shells
Unix commands
Utility programs
User application programs
Libraries (GNU C library, glibc)

Question 16

What are the seven kernel-mode components

Answer 16

System call interface (SCI)
Architecture dependent kernel code or bored support package (BSP)
NETWORK SUBSYSTEM
Device drivers
Memory management
Virtual file system
Process Management

Question 17

Part of Process Management that shares CPU time between multiple LWP’s

Answer 17

Scheduler

Question 18

Implements file and file system related interfaces provided to user mode programs

Answer 18

Virtual file system VFS

Question 19

Elements of the Linux kernel that an architecture must use for normal operation and efficiency

Answer 19

Architecture dependent kernel code or board support package BSP

Question 20

Ensures the proper and timely execution of processes

Answer 20

Process Management

Question 21

Provides an API to network resources

Answer 21

Network subsystem

Question 22

Converts a process running in user mode to a protected kernel-mode process

Answer 22

System call interface (SCI)

Question 23

What two things provide for system input / output

Answer 23

Commands and utility programs

Question 24

The kernel is responsible for managing memory resources using Pages normally ____ chunks

Answer 24

4KB

Question 25

What are the two types of device drivers

Answer 25

Permanently coded | Modular kernel drivers

Question 26

OS selection screen where if no choice is made default kernel specified in the grub configuration file is loaded

Answer 26

/boot/grub/grub.conf

Question 27

Computer programs used to perform certain tasks functions or activities and originated in USER MODE

Answer 27

Applications