Question 1

________ is not a shell.

Accepted Answer

A)  bash 
B)  csh 
C)  esh 
D)  none of the above 
A)  bash 
B)  csh 
C)  esh 
D)  none of the above

Question 2

The first netfilter hook packets encounter is ________.

Accepted Answer

A)  NF_IP_LOCAL_IN 
B)  NF_IP_LOCAL_OUT 
C)  NF_IP_PRE_ROUTING 
D)  NF_IP_FORWARD 
A)  NF_IP_LOCAL_IN 
B)  NF_IP_LOCAL_OUT 
C)  NF_IP_PRE_ROUTING 
D)  NF_IP_FORWARD

Question 3

When resolving a pathname to its corresponding data, the VFS first ________, then _________ and finally _________.

Accepted Answer

A)  calls the file system's lookup function, checks the inode cache, checks the dentry cache 
B)  checks the dentry cache, checks the inode cache, calls the file system's lookup function 
C)  checks the dentry cache, calls the file system's lookup function, returns a file not found error. 
D)  calls the file system's lookup function, checks the dentry cache, checks the inode cache 
A)  calls the file system's lookup function, checks the inode cache, checks the dentry cache 
B)  checks the dentry cache, checks the inode cache, calls the file system's lookup function 
C)  checks the dentry cache, calls the file system's lookup function, returns a file not found error. 
D)  calls the file system's lookup function, checks the dentry cache, checks the inode cache

Question 4

A page chosen for replacement cannot be immediately swapped if ________.

Accepted Answer

A)  the page is shared and is read-only 
B)  the page is shared or has been modified 
C)  the page is shared, has been modified or is locked 
D)  the page is shared or the system swap file is full 
A)  the page is shared and is read-only 
B)  the page is shared or has been modified 
C)  the page is shared, has been modified or is locked 
D)  the page is shared or the system swap file is full

Question 5

Which of the following statements accurately describes why Linux is not installed on a significant number of personal computers?

Accepted Answer

A)  Linux is harder to install than operating systems such as Windows and MacOS. 
B)  Microsoft's market power hampers Linux's popularity on personal computers. 
C)  Linux is less stable than other popular operating systems. 
D)  all of the above 
A)  Linux is harder to install than operating systems such as Windows and MacOS. 
B)  Microsoft's market power hampers Linux's popularity on personal computers. 
C)  Linux is less stable than other popular operating systems. 
D)  all of the above

Question 6

The ________ structure maintains the operations supported by a device driver.

Accepted Answer

A)  device_struct 
B)  file_operations 
C)  chrdevs 
D)  bio 
A)  device_struct 
B)  file_operations 
C)  chrdevs 
D)  bio

Question 7

The VFS ________.

Accepted Answer

A)  schedules disk I/O 
B)  implements functions such as read and write 
C)  interprets data from superblocks, files, inodes and directory entries 
D)  all of the above 
A)  schedules disk I/O 
B)  implements functions such as read and write 
C)  interprets data from superblocks, files, inodes and directory entries 
D)  all of the above

Question 8

To bear the UNIX trademarked name, an operating system must conform to ________.

Accepted Answer

A)  POSIX 
B)  SUS 
C)  LSB 
D)  none of the above 
A)  POSIX 
B)  SUS 
C)  LSB 
D)  none of the above

Question 9

Although a process's virtual address space is composed of individual pages, the kernel uses a higher-level mechanism, called ________, to organize the virtual memory a process is using.

Accepted Answer

A)  page global directories 
B)  segments 
C)  virtual memory areas 
D)  none of the above 
A)  page global directories 
B)  segments 
C)  virtual memory areas 
D)  none of the above

Question 10

Which of the following statements is false?

Accepted Answer

A)  Most devices in a system are represented by device special files. 
B)  Devices that are controlled by the same major identification number are controlled by the same driver. 
C)  Device classes include character, block and network. 
D)  Device special files are accessed via the virtual file system. 
A)  Most devices in a system are represented by device special files. 
B)  Devices that are controlled by the same major identification number are controlled by the same driver. 
C)  Device classes include character, block and network. 
D)  Device special files are accessed via the virtual file system.

Question 11

The earliest implementation of multiprocessor synchronization for the Linux kernel used the ________ to lock the kernel on all other processors.

Accepted Answer

A)  big kernel lock 
B)  global kernel lock 
C)  global system lock 
D)  None of the above. 
A)  big kernel lock 
B)  global kernel lock 
C)  global system lock 
D)  None of the above.

Question 12

Procfs was created to provide real-time information about the status of ________ in a system.

Accepted Answer

A)  network devices 
B)  processes 
C)  mounted file systems 
D)  all of the above 
A)  network devices 
B)  processes 
C)  mounted file systems 
D)  all of the above

Question 13

Real-time tasks always execute ________.

Accepted Answer

A)  in a FIFO ordering 
B)  in a FIFO ordering and with lower priority (higher nice) than normal tasks 
C)  in a round-robin ordering and with higher priority (lower nice) than normal tasks 
D)  with higher priority (lower nice) than normal tasks 
A)  in a FIFO ordering 
B)  in a FIFO ordering and with lower priority (higher nice) than normal tasks 
C)  in a round-robin ordering and with higher priority (lower nice) than normal tasks 
D)  with higher priority (lower nice) than normal tasks

Question 14

The memory manager supports ________ to allow it to scale from desktop computers and workstations to servers and supercomputers

Accepted Answer

A)  32-bit addresses 
B)  64-bit addresses 
C)  nonuniform memory access architecture 
D)  all of the above 
A)  32-bit addresses 
B)  64-bit addresses 
C)  nonuniform memory access architecture 
D)  all of the above

Question 15

The priority array that contains tasks in the active state is called the ________.

Accepted Answer

A)  current list 
B)  runnable list 
C)  active list 
D)  ready list 
A)  current list 
B)  runnable list 
C)  active list 
D)  ready list

Question 16

The transport layer packet handler supports the ________.

Accepted Answer

A)  Transmission Control Protocol (TCP) 
B)  User Datagram Protocol (UDP) 
C)  Control Message Protocol (ICMP) 
D)  all of the above 
A)  Transmission Control Protocol (TCP) 
B)  User Datagram Protocol (UDP) 
C)  Control Message Protocol (ICMP) 
D)  all of the above

Question 17

A task's effective priority is calculated when ________.

Accepted Answer

A)  a task sleeps 
B)  a task sleeps or consumes its time slice 
C)  a task consumes its time slice or is awakened by another thread 
D)  a task sleeps, consumes its time slice or is awakened by another thread. 
A)  a task sleeps 
B)  a task sleeps or consumes its time slice 
C)  a task consumes its time slice or is awakened by another thread 
D)  a task sleeps, consumes its time slice or is awakened by another thread.

Question 18

________ determines the order in which packets are processed.

Accepted Answer

A)  The kernel 
B)  Each network interface card 
C)  Each device driver 
D)  A process that submits packets 
A)  The kernel 
B)  Each network interface card 
C)  Each device driver 
D)  A process that submits packets

Question 19

Passwords can be hashed using the ________ algorithm.

Accepted Answer

A)  3DES 
B)  DES 
C)  MD4 
D)  all of the above 
A)  3DES 
B)  DES 
C)  MD4 
D)  all of the above

Question 20

A process or thread can handle a signal by ________.

Accepted Answer

A)  ignoring the signal 
B)  catching the signal 
C)  executing the default action that the kernel defines for that signal 
D)  all of the above 
A)  ignoring the signal 
B)  catching the signal 
C)  executing the default action that the kernel defines for that signal 
D)  all of the above

Exam 20: Exploring the Linux Operating Systems Features and Functionality

________ is not a shell.

The first netfilter hook packets encounter is ________.

When resolving a pathname to its corresponding data, the VFS first ________, then _________ and finally _________.

A page chosen for replacement cannot be immediately swapped if ________.

Which of the following statements accurately describes why Linux is not installed on a significant number of personal computers?

The ________ structure maintains the operations supported by a device driver.

The VFS ________.

To bear the UNIX trademarked name, an operating system must conform to ________.

Although a process's virtual address space is composed of individual pages, the kernel uses a higher-level mechanism, called ________, to organize the virtual memory a process is using.

Which of the following statements is false?

The earliest implementation of multiprocessor synchronization for the Linux kernel used the ________ to lock the kernel on all other processors.

Procfs was created to provide real-time information about the status of ________ in a system.

Real-time tasks always execute ________.

The memory manager supports ________ to allow it to scale from desktop computers and workstations to servers and supercomputers

The priority array that contains tasks in the active state is called the ________.

The transport layer packet handler supports the ________.

A task's effective priority is calculated when ________.

________ determines the order in which packets are processed.

Passwords can be hashed using the ________ algorithm.

A process or thread can handle a signal by ________.

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

When resolving a pathname to its corresponding data, the VFS first ____, then _ and finally _____.