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LabSim Exam Questions
Terms in this set (8)
Which command displays the PPID?
ps -f
A user calls with a concern about the display he is seeing after running the command: ps -ef. There are a number of processes that display getty and he is afraid that an unauthorized user is attached to the system. How should you respond?
Assure the user that this is normal.
You answer a call from a number of users who cannot access the mail server. Which utility would you use to quickly see if the sendmail service is running?
ps
Which statement is correct on how to differentiate core processes from other services?
If you run ps -aux, the core processes are at the top of the listing.
They have the lowest pid numbers, always below 100.
Which command displays in the most detail all the processes that are running?
ps -ef
Which command would you use to look for a potential resource hog on a workstation?
top
You want to view all currently-running processes that include getty in the process name. Which command would you use?
ps -A | grep getty
You need to see a listing of running processes and system status such as memory and CPU usage. Which command will produce the listing?
top
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Verified questionsCOMPUTER SCIENCE
How does the self-map make it easy for the VM manager to move the page-table pages to and from disk? Where are the page-table pages kept on disk?
Verified answer
COMPUTER SCIENCE
What statement can be executed in the body of a loop to cause it to terminate? a) if b) input c) break d) exit
Verified answer
COMPUTER SCIENCE
The following pseudocode describes how to turn a string containing a ten-digit phone number (such as "4155551212") into a more readable string with parentheses and dashes, like this: "(415) 555-1212". Take the string consisting of the first three characters and surround it with "(" and ") ". This is the area code. Concatenate the area code, the string consisting of the next three characters, a hyphen, and the string consisting of the last four characters. This is the formatted number. Translate this pseudocode into a Python program that reads a telephone number into a string variable, computes the formatted number, and prints it.
Verified answer
COMPUTER SCIENCE
According to the Coulomb force law, the electric force between two charged particles of charge $Q_{1} \text { and } Q_{2}$ Coulombs, that are a distance r meters apart, is $F=\frac{Q_{1} Q_{2}}{4 \pi \varepsilon r^{2}}$ Newtons, where $\varepsilon=8.854 \times 10^{-12}$ Farads/meter. Write a program that calculates and displays the force on a pair of charged particles, based on the user input of $Q_{1}$ Columbus, $Q_{2}$ Coulombs, and r meters.
Verified answer
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