Question 1

The unified device model defines data structures to represent ________.

Accepted Answer

A)  devices 
B)  device drivers 
C)  buses 
D)  all of the above 
A)  devices 
B)  device drivers 
C)  buses 
D)  all of the above

Question 2

A daemon ________.

Accepted Answer

A)  remains dormant until the scheduler or another component of the kernel wakes it 
B)  enforces the system's security policies 
C)  spawns all other tasks in the system 
D)  none of the above 
A)  remains dormant until the scheduler or another component of the kernel wakes it 
B)  enforces the system's security policies 
C)  spawns all other tasks in the system 
D)  none of the above

Question 3

The virtual memory system supports up to ________ levels of page tables to locate the mappings between virtual pages and page frames.

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  none of the above. The kernel supports an arbitrary number of levels. 
A)  2 
B)  3 
C)  4 
D)  none of the above. The kernel supports an arbitrary number of levels.

Question 4

Which of the following Linux organizations is not-for-profit?

Accepted Answer

A)  Debian 
B)  Mandrake 
C)  Red Hat 
D)  SuSE 
A)  Debian 
B)  Mandrake 
C)  Red Hat 
D)  SuSE

Question 5

The three layers that compose a typical GUI on a Linux system are ________, ________ and ________.

Accepted Answer

A)  the kernel, a video driver, the X Window System 
B)  the X Window System, a display adapter, a desktop environment 
C)  the X Window System, a window manager, a desktop environment 
D)  a desktop environment, a video driver, a display adapter 
A)  the kernel, a video driver, the X Window System 
B)  the X Window System, a display adapter, a desktop environment 
C)  the X Window System, a window manager, a desktop environment 
D)  a desktop environment, a video driver, a display adapter

Question 6

Related processes can search for a ________ in an array of ________.

Accepted Answer

A)  message, message queue descriptors 
B)  message queue descriptor, message queue identifiers 
C)  message queue identifier, message queue descriptors 
D)  message queue descriptors, messages 
A)  message, message queue descriptors 
B)  message queue descriptor, message queue identifiers 
C)  message queue identifier, message queue descriptors 
D)  message queue descriptors, messages

Question 7

When processes submit network data to the socket interface, they specify ________.

Accepted Answer

A)  the network address of the destination 
B)  a reference to a network device driver 
C)  the MAC address of the network interface card 
D)  none of the above 
A)  the network address of the destination 
B)  a reference to a network device driver 
C)  the MAC address of the network interface card 
D)  none of the above

Question 8

NUMA architectures divide a system into nodes, each of which provides high-performance interconnections between ________.

Accepted Answer

A)  processors 
B)  memory 
C)  I/O devices 
D)  all of the above 
A)  processors 
B)  memory 
C)  I/O devices 
D)  all of the above

Question 9

Version 3 of the Single UNIX Specification combines several standards, including the________ and ________ standards.

Accepted Answer

A)  POSIX, LSB 
B)  LSB, ISO 
C)  ISO, POSIX 
D)  ISO, BSD 
A)  POSIX, LSB 
B)  LSB, ISO 
C)  ISO, POSIX 
D)  ISO, BSD

Question 10

The anticipatory and deadline schedulers are different in that ________.

Accepted Answer

A)  the anticipatory scheduler prevents read request starvation, whereas the deadline scheduler is more appropriate for real-time systems 
B)  the anticipatory scheduler prevents read request starvation by introducing a 6ms pause after each read request 
C)  the deadline scheduler is more appropriate when write requests and synchronous read requests occur concurrently 
D)  both a and b 
A)  the anticipatory scheduler prevents read request starvation, whereas the deadline scheduler is more appropriate for real-time systems 
B)  the anticipatory scheduler prevents read request starvation by introducing a 6ms pause after each read request 
C)  the deadline scheduler is more appropriate when write requests and synchronous read requests occur concurrently 
D)  both a and b

Question 11

Procfs is a file system ________.

Accepted Answer

A)  can be accessed only by a user with root privileges 
B)  that exists only in main memory 
C)  contains VFS directory entries 
D)  that is read-only 
A)  can be accessed only by a user with root privileges 
B)  that exists only in main memory 
C)  contains VFS directory entries 
D)  that is read-only

Question 12

By default, Linux supports ________.

Accepted Answer

A)  symmetric multiprocessing (SMP) 
B)  cache-only memory access (COM
A)  
C)  programs written for operating systems including Windows and MacOS 
D)  all of the above 
A)  symmetric multiprocessing (SMP) 
B)  cache-only memory access (COM
A)  
C)  programs written for operating systems including Windows and MacOS 
D)  all of the above

Question 13

In Linux systems, a task represents a ________.

Accepted Answer

A)  process 
B)  thread 
C)  job 
D)  a and b only 
A)  process 
B)  thread 
C)  job 
D)  a and b only

Question 14

A task transitions to the ________ state when it is dispatched to a processor.

Accepted Answer

A)  running 
B)  ready 
C)  executable 
D)  dispatch 
A)  running 
B)  ready 
C)  executable 
D)  dispatch

Question 15

Linux uses ________ to support authentication via interfaces including smart cards, Kerberos and voice authorization systems.

Accepted Answer

A)  Linux security modules (LSMs) 
B)  mandatory access control (MA
C)  
C)  pluggable authentication modules (PAMs) 
D)  SELinux 
A)  Linux security modules (LSMs) 
B)  mandatory access control (MA
C)  
C)  pluggable authentication modules (PAMs) 
D)  SELinux

Question 16

The GPL states that any software distributed under its license ________.

Accepted Answer

A)  can be freely redistributed 
B)  must be delivered free of charge 
C)  must be accompanied by its source code 
D)  a and b only 
A)  can be freely redistributed 
B)  must be delivered free of charge 
C)  must be accompanied by its source code 
D)  a and b only

Question 17

Locking the entire kernel is usually not required, because ________.

Accepted Answer

A)  processes on other processors are almost always executing in user mode. 
B)  kernel data structures are mostly read-only. 
C)  multiple processes can execute concurrently in kernel mode provided they do not modify the same data structures. 
D)  all of the above 
A)  processes on other processors are almost always executing in user mode. 
B)  kernel data structures are mostly read-only. 
C)  multiple processes can execute concurrently in kernel mode provided they do not modify the same data structures. 
D)  all of the above

Question 18

Linux was originally developed ________.

Accepted Answer

A)  to replace UNIX 
B)  as a hobby project 
C)  for professors to use in class to demonstrate operating system implementation issues 
D)  because no other open-source operating system existed 
A)  to replace UNIX 
B)  as a hobby project 
C)  for professors to use in class to demonstrate operating system implementation issues 
D)  because no other open-source operating system existed

Question 19

If an ext2 file system uses 2KB blocks, a file smaller than ________ can be located directly from its inode.

Accepted Answer

A)  16KB 
B)  20KB 
C)  24KB 
D)  48KB 
A)  16KB 
B)  20KB 
C)  24KB 
D)  48KB

Question 20

_________ is the kernel subsystem that manages modules without user interaction

Accepted Answer

A)  lkm 
B)  kloadmod 
C)  kmod 
D)  kautoload 
A)  lkm 
B)  kloadmod 
C)  kmod 
D)  kautoload

Exam 20: Exploring the Linux Operating Systems Features and Functionality

The unified device model defines data structures to represent ________.

A daemon ________.

The virtual memory system supports up to ________ levels of page tables to locate the mappings between virtual pages and page frames.

Which of the following Linux organizations is not-for-profit?

The three layers that compose a typical GUI on a Linux system are ________, ________ and ________.

Related processes can search for a ________ in an array of ________.

When processes submit network data to the socket interface, they specify ________.

NUMA architectures divide a system into nodes, each of which provides high-performance interconnections between ________.

Version 3 of the Single UNIX Specification combines several standards, including the________ and ________ standards.

The anticipatory and deadline schedulers are different in that ________.

Procfs is a file system ________.

By default, Linux supports ________.

In Linux systems, a task represents a ________.

A task transitions to the ________ state when it is dispatched to a processor.

Linux uses ________ to support authentication via interfaces including smart cards, Kerberos and voice authorization systems.

The GPL states that any software distributed under its license ________.

Locking the entire kernel is usually not required, because ________.

Linux was originally developed ________.

If an ext2 file system uses 2KB blocks, a file smaller than ________ can be located directly from its inode.

_________ is the kernel subsystem that manages modules without user interaction

Exploring Operating Systems and Distributed Computing: a Comprehensive Overview

Understanding Computer Systems and Programming Concepts

Understanding Processes and Threads in Operating Systems

Exploring Semaphores and Multithreading in Operating Systems

Exploring Thread Synchronization and Mutual Exclusion in Java

Concurrency and Deadlock in Database Systems: Exploring Monitor Implementation and Thread Synchronization in Java

Operating System Scheduling and Deadlock Prevention: a Comprehensive Guide

Understanding Processor Scheduling and Memory Management in Operating Systems

Memory Management in Operating Systems: Segmentation, Paging, and Strategies for Efficiency

Memory Management and Address Translation in Operating Systems

Memory Management and Page Replacement Strategies in Operating Systems

Disk Storage and Raid Technology

Understanding File Systems and Database Systems: a Comprehensive Overview

Exploring Performance Evaluation and Benchmarking in Computer Systems

Understanding Multiprocessor Organizations and System Performance

Understanding the Layers of the TCP/IP Protocol Stack

Understanding Distributed Systems and Operating Systems

Exploring Distributed File Systems and Grid Computing With NFS, AFS, Coda, and JXTA

Security Threats and Solutions in Cryptography and Access Control

In-Depth Analysis of Windows XP

Filters

The three layers that compose a typical GUI on a Linux system are , and .

Related processes can search for a in an array of .

Version 3 of the Single UNIX Specification combines several standards, including the and standards.