Linux and LPIC-1 Guide to Linux Certification
5th Edition
ISBN: 9780357392782
Author: Jason Eckert
Publisher: Cengage Learning US
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Chapter 1, Problem 20RQ
Which of the following Linux distributions is likely to be used by a
- a. Fedora
- b. Ubuntu
- c. Kali
- d. Gentoo
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2. UNIX Shell and History Feature [20 points]
This question consists of designing a C program to serve as a shell interface that
accepts user commands and then executes each command in a separate process. A
shell interface gives the user a prompt, after which the next command is entered.
The example below illustrates the prompt osh> and the user's next command:
cat prog.c. The UNIX/Linux cat command displays the contents of the file
prog.c on the terminal using the UNIX/Linux cat command and your program
needs to do the same.
osh> cat prog.c
The above can be achieved by running your shell interface as a parent process.
Every time a command is entered, you create a child process by using fork(),
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Question#2: Design and implement a Java program using Abstract Factory and Singleton design
patterns.
The
program displays date and time in one of the following two formats:
Format 1:
Date: MM/DD/YYYY
Time: HH:MM:SS
Format 2:
Date: DD-MM-YYYY
Time: SS,MM,HH
The following is how the program works. In the beginning, the program asks the user what
display format that she wants. Then the program continuously asks the user to give one of the
following commands, and performs the corresponding task. Note that the program gets the
current date and time from the system clock (use the appropriate Java date and time operations
for this).
'd' display current date
't': display current time
'q': quit the program.
• In the program, there should be 2 product hierarchies: "DateObject” and “TimeObject”. Each
hierarchy should have format and format2 described above.
•
Implement the factories as singletons.
• Run your code and attach screenshots of the results.
• Draw a UML class diagram for the program.
#include <linux/module.h> #include <linux/kernel.h> // part 2 #include <linux/sched.h> // part 2 extra #include <linux/hash.h> #include <linux/gcd.h> #include <asm/param.h> #include <linux/jiffies.h> void print_init_PCB(void) { printk(KERN_INFO "init_task pid:%d\n", init_task.pid); printk(KERN_INFO "init_task state:%lu\n", init_task.state); printk(KERN_INFO "init_task flags:%d\n", init_task.flags); printk(KERN_INFO "init_task runtime priority:%d\n", init_task.rt_priority); printk(KERN_INFO "init_task process policy:%d\n", init_task.policy); printk(KERN_INFO "init_task task group id:%d\n", init_task.tgid); } /* This function is called when the module is loaded. */ int simple_init(void) { printk(KERN_INFO "Loading Module\n"); print_init_PCB(); printk(KERN_INFO "Golden Ration Prime = %lu\n", GOLDEN_RATIO_PRIME); printk(KERN_INFO "HZ = %d\n", HZ); printk(KERN_INFO "enter jiffies = %lu\n", jiffies); return 0; } /* This function is called when the…
Chapter 1 Solutions
Linux and LPIC-1 Guide to Linux Certification
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 - Which of the following kernels are developmental...Ch. 1 - Prob. 6RQCh. 1 - Prob. 7RQCh. 1 - To which license does Linux adhere? a. open...Ch. 1 - Prob. 9RQCh. 1 - Prob. 10RQ
Ch. 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. 14RQCh. 1 - Prob. 15RQCh. 1 - Prob. 16RQCh. 1 - Prob. 17RQCh. 1 - Prob. 18RQCh. 1 - Prob. 19RQCh. 1 - Which of the following Linux distributions is...
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