Solve the following equations for the variable indicated, in terms of the remaining variable(s).

7 x + 3 =y Solve for x.

x =y — 3 Added — 3 to both sides
x =y — 3 This is the solution.

Computer Science & Information Technology

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Explain the error in the following code. You may give the warning message, or error message, your compiler might give for the following error, or you may describe the error. However you present the error, you must explain clearly what is wrong.

``` #include //Test question void show_array(int ar[], int size) { using namespace std; for(int i = 0; i < size; i++) cout << ar[i] << " "; cout << endl; } int main() { const int a[6] = {2, 4, 2, 3, 5}; show_array(a, 6); //... } ```

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Case-Based Critical Thinking QuestionsCase 4-2Jake is an expert in the use of the Property inspector to create precisely the attributes he needs for the AP divs that he creates, with regard to when the AP div's content is displayed or hidden and how it relates to its parent AP div if it is nested. Jake knows that if the AP div is hidden when the page is loaded, different actions by the user can make it visible. Which of the following settings does he select to use the browser's default visibility?

A. Inherit B. Basic C. Main D. Default

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Can you find evidence of that in the log entries shown above? If so in what lines? Explain.

Operating system log file example a. Stored under /var/log, the messages file stores various system events. The connection of new USB drive, a network card becoming available, and too many missed root login attempts, are a few examples of events logged to the /var/log/messages file. Use the more command to display the contents of the /var/log/messages file. Unlike the cat command, more allows for a paced navigation through the file. Press ENTER to advance line-by-line or SPACE to advance an entire page. Press q or CTRL + C to abort and exit more. Your entries will be different than the output shown below. 

[analyst@secOps ~]$ sudo more /var/log/messages
[sudo] password for analyst:
Mar 20 08:34:38 secOps kernel: [ 6.149910] random: crng init done
Mar 20 08:34:40 secOps kernel: [ 8.280667] floppy0: no floppy controllers found
Mar 20 08:34:40 secOps kernel: [ 8.280724] work still pending
Mar 20 08:35:16 secOps kernel: [ 44.414695] hrtimer: interrupt took 5346452
ns
Mar 20 14:28:29 secOps kernel: [21239.566409] pcnet32 0000:00:03.0 enp0s3: link
down
Mar 20 14:28:33 secOps kernel: [21243.404646] pcnet32 0000:00:03.0 enp0s3: link
up, 100Mbps, full-duplex
Mar 20 14:28:35 secOps kernel: [21245.536961] pcnet32 0000:00:03.0 enp0s3: link
down
Mar 20 14:28:43 secOps kernel: [21253.427459] pcnet32 0000:00:03.0 enp0s3: link
up, 100Mbps, full-duplex
Mar 20 14:28:53 secOps kernel: [21263.449480] pcnet32 0000:00:03.0 enp0s3: link
down
Mar 20 14:28:57 secOps kernel: [21267.500152] pcnet32 0000:00:03.0 enp0s3: link
up, 100Mbps, full-duplex
Mar 20 14:29:01 secOps kernel: [21271.551499] pcnet32 0000:00:03.0 enp0s3: link
down
Mar 20 14:29:05 secOps kernel: [21275.389707] pcnet32 0000:00:03.0 enp0s3: link
up, 100Mbps, full-duplex
Mar 22 06:01:40 secOps kernel: [ 0.000000] Linux version 4.8.12-2-ARCH
(builduser@andyrtr) (gcc version 6.2.1 20160830 (GCC) ) #1 SMP PREEMPT Fri Dec
2 20:41:47 CET 2016
Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature
0x001: 'x87 floating point registers'
Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature
0x002: 'SSE registers'
Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature
0x004: 'AVX registers'
Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: xstate_offset[2]: 576,
xstate_sizes[2]: 256
Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Enabled xstate features
0x7, context size is 832 bytes, using 'standard' format.
Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Using 'eager' FPU context
switches.
Notice that the events listed above are very different from the web server events. Because the operating system itself is generating this log, all recorded events are in relation to the OS itself. b. If necessary, enter Ctrl + C to exit out of the previous command. c. Log files are very important for troubleshooting. Assume that a user of that specific system reported that all network operations were slow around 2:30pm.

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What activities are associated with reverse engineering?

What will be an ideal response?

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