CompTIA Linux+ Guide to Linux Certification (MindTap Course List)
4th Edition
ISBN: 9781305107168
Author: Jason Eckert
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 1, Problem 6RQ
Program Description Answer
Production kernel includes minor number as even.
Hence, correct answer is option “D”.
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What are the advantages and disadvantages of making
only some of the symbols defined inside a kernel
accessible to a loadable kernel module?
A production kernel refers to a kernel whose ___________ .a. revision number is evenb. minor number is oddc. major number is oddd. minor number is even
The original Linux developers built a non-preemptible kernel for whatever reason.What good does it do to have a non-preemptible kernel in a single-processor computer? However, with a system with several processors, why does this benefit decrease?
Chapter 1 Solutions
CompTIA Linux+ Guide to Linux Certification (MindTap Course List)
Ch. 1 - Every computer consists of physical components and...Ch. 1 - The operating system software is necessary for a...Ch. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Prob. 5RQCh. 1 - Prob. 6RQCh. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - To which license does Linux adhere? a. open...Ch. 1 - Prob. 10RQ
Ch. 1 - Prob. 11RQCh. 1 - Which two people are credited with creating the...Ch. 1 - Who formed the Free Software Foundation to promote...Ch. 1 - Which culture embraced the term “GNU” (GNU’s Not...Ch. 1 - Prob. 15RQCh. 1 - Prob. 16RQCh. 1 - Prob. 17RQCh. 1 - Prob. 18RQCh. 1 - Prob. 19RQCh. 1 - Prob. 20RQ
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- Task 3: Measure the Entropy of Kernel In the virtual world, it is difficult to create randomness, i.e., software alone is hard to create random numbers. Most systems resort to the physical world to gain the randomness. Linux gains the randomness from the following physical resources: void add_keyboard_randomness(unsigned char scancode); void add_mouse_randomness(__u32 mouse_data); void add_interrupt_randomness(int irq); void add_blkdev_randomness(int major); The first two are quite straightforward to understand: the first one uses the timing between key presses; the second one uses mouse movement and interrupt timing; the third one gathers random numbers using the interrupt timing. Of course, not all interrupts are good sources of randomness. For example, the timer interrupt is not a good choice, because it is predictable. However, disk interrupts are a better measure. The last one measures the finishing time of block device requests. The randomness is measured using entropy, which is…arrow_forwardThe creators of Linux first decided to go with a non-preemptible kernel because...How exactly does a non-preemptible kernel benefit a system with just one processor? Why does the benefit become less significant as more processors are used?arrow_forwardQUESTION 8 emulator: noname.exe file math debug view external virtual devices virtual drive help step back ID single step Load reload run step delay ms: 100 registers 0722:0000 0722:0000 L 07220: 9A 154 ül 07221: 23 035 # 07222: 76 118 v 07223: 34 052 4| 07224: 12 018 ± 07225: B8 184 © 07226: 00 000 NI CALL 01234h:07623h MOV AX, 04CO0h INT 021h NOP NOP NOP AX 00 00 BX 00 00 01 2A DX 00 00 CS 0722 IP 0000 debug stack flags screen source reset aux vars A712 Based on the above screenshot, answer the following questions: (1) How many bytes of the machine code of the CALL 1234H:7623H instruction? (2) After the CALL 1234H:7623H instruction is executed, what are the new values of IP & CS? (3) After the CALL 1234H:7623H instruction is executed, what data are saved onto stack?arrow_forward
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