Question 1

________ is/are a layer between the virtual file system and an existing file system.

Accepted Answer

A)  Aloopback device 
B)  A file system interface 
C)  The Cryptographic API 
D)  Access control attributes 
A)  Aloopback device 
B)  A file system interface 
C)  The Cryptographic API 
D)  Access control attributes A

Question 2

The thrust of Linux scalability development is to ________.

Accepted Answer

A)  enable the Linux kernel to scale to high-end servers 
B)  improve performance on desktop systems 
C)  enable the Linux kernel to perform well on embedded systems. 
D)  both a and c 
A)  enable the Linux kernel to scale to high-end servers 
B)  improve performance on desktop systems 
C)  enable the Linux kernel to perform well on embedded systems. 
D)  both a and c D

Question 3

Embedded-device developers modify the kernel's ________.

Accepted Answer

A)  scheduler to support additional priority levels, deadlines and lower scheduling latency 
B)  virtual file system to support low-capacity storage devices 
C)  network layer to support wireless networking 
D)  all of the above 
A)  scheduler to support additional priority levels, deadlines and lower scheduling latency 
B)  virtual file system to support low-capacity storage devices 
C)  network layer to support wireless networking 
D)  all of the above A

Question 4

If a page corresponds to a process's data or procedure page, kswapd writes it to a region of data in secondary storage called the ________.

Accepted Answer

A)  system swap file 
B)  swap cache 
C)  slab file 
D)  backing store 
A)  system swap file 
B)  swap cache 
C)  slab file 
D)  backing store

Question 5

One limitation of pipes is that they support communication only between processes that share a ________.

Accepted Answer

A)  region of virtual memory 
B)  file descriptor 
C)  parent 
D)  pipe buffer 
A)  region of virtual memory 
B)  file descriptor 
C)  parent 
D)  pipe buffer

Question 6

By abstracting the concept of a file, the kernel can access _________ via the VFS.

Accepted Answer

A)  block I/O devices 
B)  network devices 
C)  interprocess communication primitives 
D)  Both a and b 
A)  block I/O devices 
B)  network devices 
C)  interprocess communication primitives 
D)  Both a and b

Question 7

The immutable file attribute specifies that ________.

Accepted Answer

A)  a file cannot be modified 
B)  a file can be modified only by appending data to the end of the file 
C)  usrs cannot create a link to the file 
D)  either a or c 
A)  a file cannot be modified 
B)  a file can be modified only by appending data to the end of the file 
C)  usrs cannot create a link to the file 
D)  either a or c

Question 8

Loadable kernel modules are important because ________.

Accepted Answer

A)  they impose a modular structure on the Linux kernel 
B)  they can reduce the kernel's memory footprint 
C)  they allow modifications to the kernel without recompiling the kernel 
D)  b and c only 
A)  they impose a modular structure on the Linux kernel 
B)  they can reduce the kernel's memory footprint 
C)  they allow modifications to the kernel without recompiling the kernel 
D)  b and c only

Question 9

Linux systems include ________.

Accepted Answer

A)  the kernel and user interfaces 
B)  user interfaces and applications 
C)  the kernel, user interfaces and applications 
D)  the kernel only 
A)  the kernel and user interfaces 
B)  user interfaces and applications 
C)  the kernel, user interfaces and applications 
D)  the kernel only

Question 10

The unified device model ________.

Accepted Answer

A)  enables the kernel to use device classes to determine the bus to which a device is attached 
B)  organizes a systems' devices, device classes, device drivers and buses hierarchically 
C)  was required to implement Plug and Play 
D)  Both a and c. 
A)  enables the kernel to use device classes to determine the bus to which a device is attached 
B)  organizes a systems' devices, device classes, device drivers and buses hierarchically 
C)  was required to implement Plug and Play 
D)  Both a and c.

Question 11

________ were one of the first interprocess communication mechanisms available in UNIX systems.

Accepted Answer

A)  signals 
B)  pipes 
C)  sockets 
D)  message queues 
A)  signals 
B)  pipes 
C)  sockets 
D)  message queues

Question 12

To improve performance for file and directory access, the virtual file system maintains the _________ and _________ caches.

Accepted Answer

A)  directory entry, inode 
B)  swap, slab 
C)  swap, directory entry 
D)  slab, inode 
A)  directory entry, inode 
B)  swap, slab 
C)  swap, directory entry 
D)  slab, inode

Question 13

A ________ transmits data as a stream of bytes.

Accepted Answer

A)  block device 
B)  network device 
C)  character device 
D)  none of the above 
A)  block device 
B)  network device 
C)  character device 
D)  none of the above

Question 14

The Linux kernel initially supported the _________ platform.

Accepted Answer

A)  Intel x86 
B)  Sun SPARC 
C)  Motorola 68000 
D)  all of the above 
A)  Intel x86 
B)  Sun SPARC 
C)  Motorola 68000 
D)  all of the above

Question 15

Most NUMA systems partition a single ________ into regions corresponding to each node.

Accepted Answer

A)  virtual memory address space 
B)  physical memory address space 
C)  disk 
D)  all of the above 
A)  virtual memory address space 
B)  physical memory address space 
C)  disk 
D)  all of the above

Question 16

Stable versions of the Linux kernel are assigned an ________.

Accepted Answer

A)  odd minor version number 
B)  odd major version number 
C)  even major version number 
D)  even minor version number 
A)  odd minor version number 
B)  odd major version number 
C)  even major version number 
D)  even minor version number

Question 17

To prevent indefinite postponement and provide writers with fast access to critical sections, kernel control paths use ________.

Accepted Answer

A)  kernel semaphores 
B)  writer locks 
C)  reader locks 
D)  seqlocks 
A)  kernel semaphores 
B)  writer locks 
C)  reader locks 
D)  seqlocks

Question 18

A ________ is a region of memory that the kernel guarantees will be available to a kernel thread or device driver regardless of how much memory is currently occupied.

Accepted Answer

A)  page cache 
B)  slab cache 
C)  DMA memory 
D)  memory pool 
A)  page cache 
B)  slab cache 
C)  DMA memory 
D)  memory pool

Question 19

________ is not one of Linux's primary subsystems?

Accepted Answer

A)  Process management 
B)  Virtual file system 
C)  Networking 
D)  Interprocess communication 
A)  Process management 
B)  Virtual file system 
C)  Networking 
D)  Interprocess communication

Question 20

When the kernel receives an interrupt from a hardware device, it passes control to ________.

Accepted Answer

A)  the bottom half of the driver's interrupt handler 
B)  the top half of the driver's interrupt handler 
C)  a softirq 
D)  tasklet 
A)  the bottom half of the driver's interrupt handler 
B)  the top half of the driver's interrupt handler 
C)  a softirq 
D)  tasklet

Exam 20: Exploring the Linux Operating Systems Features and Functionality

________ is/are a layer between the virtual file system and an existing file system.

The thrust of Linux scalability development is to ________.

Embedded-device developers modify the kernel's ________.

If a page corresponds to a process's data or procedure page, kswapd writes it to a region of data in secondary storage called the ________.

One limitation of pipes is that they support communication only between processes that share a ________.

By abstracting the concept of a file, the kernel can access _________ via the VFS.

The immutable file attribute specifies that ________.

Loadable kernel modules are important because ________.

Linux systems include ________.

The unified device model ________.

________ were one of the first interprocess communication mechanisms available in UNIX systems.

To improve performance for file and directory access, the virtual file system maintains the _________ and _________ caches.

A ________ transmits data as a stream of bytes.

The Linux kernel initially supported the _________ platform.

Most NUMA systems partition a single ________ into regions corresponding to each node.

Stable versions of the Linux kernel are assigned an ________.

To prevent indefinite postponement and provide writers with fast access to critical sections, kernel control paths use ________.

A ________ is a region of memory that the kernel guarantees will be available to a kernel thread or device driver regardless of how much memory is currently occupied.

________ is not one of Linux's primary subsystems?

When the kernel receives an interrupt from a hardware device, it passes control to ________.

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

To improve performance for file and directory access, the virtual file system maintains the _ and _ caches.