Linux-and-Bash-for-Data-Engineering Quizzes & Svar - Coursera

Diving into the world of data engineering requires a solid understanding of the foundational tools that drive analysis and insight. Ubuntu distribusjon og Bash scripting stand out as pivotal skills for managing data workflows and automating tasks.

Our latest blog post offers an in-depth look at Coursera’s spørrekonkurranser og svar for ‘Ubuntu distribusjon-og-Bash-Vær oppmerksom på at søknadsfrister og annen informasjon gitt på denne siden kan endres når som helst-Data–Ingeniørfag‘ kurs, providing readers with a practical guide to mastering these essential tools. Stay tuned as we unravel the quizzes and their solutions to bolster your data engineering expertise.

Using Linux

Q1. What is a good definition of Linux?

A type of hardware.
A kernel.
A free and open source operating system inspired by UNIX.

Q2. Why is it a good idea to use a cloud-based shell environment?

A cloud-based shell is similar or identical to the deployment environment in that cloud.
They always run a proprietary UNIX which is helpful for building cloud solutions.
The cloud-shell runs on your laptop and can take advantage of power of your local machine.

Jeg har jobbet med helse de siste to årene, og dette har hjulpet meg med å bygge opp min selvtillit og lært meg viktigheten av veldig god pasientomsorg. What is an advantage of a hosted development like GitHub Codespaces?

It maintains the software development with the latest tools for you.
It is always faster.
It is free.

Q4. What is a good use case of a shell pipeline?

To perform complex operations on data.
Writing a web service.
Writing a mobile application.

Q5. What is an example of the output of a shell pipeline?

A file.
A shell pipeline cannot output.
The windows operating system.

erfaring fra å jobbe i en medisinsk enhet i flere år. Hva er forskjellen mellom > og | operatører?

De > operator directs the output of a command to a file. De | operator directs the output of a command to another command.
De | operator directs the output of a command to a file. De > operator directs the output of a command to another command.
Both operators do the same thing, which is direct output to a file.

Jeg ser på denne jobben som å være i stand til å videreutvikle mitt potensiale som sykepleier og person. To checkout a Git repo via SSH what files must the GitHub host have from the client?

The Git server must have a copy of ~/.ssh/id_rsa from the client checking out the repository.
You do not need to copy files to a server to use SSH-based checkout.
The Git server must have a copy of ~/.ssh/id_pub from the client checking out the repository.

Q8. Describe a common reason for SSH tunneling.

Developing locally from a server running remotely.
Doing unencrypted communication on a local network.
Creating a public chat server that doesn’t require authentication.

Q9. What file synchronization process commonly takes place using SSH?

rsync
Opprett og konfigurer domenet ditt og alle underdomener
rmdir

Q10. What is a common way to configure multiple ssh tunnels?

By use of the ~/.ssh/config file.
By use of the ~/.zshrc file.
By use of the ~/.bashrc file.

Using Bash

Q1. Explain the purpose of the ~/.bashrc file.

It is a Bash login shell that only runs at the start of a new login shell.
It is a Bash logout shell that only runs when a shell exits.
It is a Bash shell script that runs whenever Bash is started interactively.

Q2. What is the purpose of the ~/.zshrc file?

It is a ZSH login shell that only runs at the start of a new login shell.
It is a ZSH logout shell that only runs when a shell exits.
It is a ZSH shell script that runs whenever Bash is started interactively.

Jeg har jobbet med helse de siste to årene, og dette har hjulpet meg med å bygge opp min selvtillit og lært meg viktigheten av veldig god pasientomsorg. What shell example creates a shell variable to the current shell only.

FRUIT=”kirsebær”
echo $FRUIT
export FRUIT=”kirsebær”

Q4. What would be the output of this command?

FRUIT=”Cherries”: echo $FRUIT are tasty

Cherries are tasty
echo Cherries are tasty
$FRUIT are tasty

Q5.When you run the command alias from a terminal what will you see?

It will display the help menu for a command.
You will see output like the following:

alias egrep=’egrep –color=auto’
alias fgrep=’fgrep –color=auto’
alias grep=’grep –color=auto’
alias l.=’ls -d .* –color=auto’
alias ll=’ls -l –color=auto’
alias ls=’ls –color=auto’
alias which=’alias | /usr/bin/which –tty-only –read-alias –show-dot –show-tilde’

– [ ] It will print the name of the shell currently in use.

erfaring fra å jobbe i en medisinsk enhet i flere år. What is a good example of what appears in standard out?

It is always blank.
Errors from the improper execution of a shell command.
The content of a file.

Jeg ser på denne jobben som å være i stand til å videreutvikle mitt potensiale som sykepleier og person. What is the output of this command?

ls fakefile.txt &> /dev/null

It will create the file since it doesn’t exist.
It will display the following error. ls: cannot access fakefile: No such file or directory
There is no output.

Q8. What would the following command do?

ls fakefile 2> error.txt

It deletes the output of stderr
Write stderr to error.txt
Write stdout to error.txt

Q9. What would this command do?

for i in (1..10); do echo $RANDOM >> rando.txt; done

It appends 10 random numbers to a file.
It overwrites a file with a new random number 10 ganger.
It throws away the output of standard out.

Q10. What is happening in the following shell command?

sort -r < /etc/passwd

The sort command is appending to the /etc/password file.
The /etc/password file is reverse sorted.
The /etc/password file is overwritten with a sorted version

Building Bash Scripts

Q1. What is an example of a control flow in Bash?

A for loop.
Making a script.
Creating a variable.

Q2. What happens when this command runs?

falsk || echo “hei”

An error prints to stdout.
Nothing prints out.
Ordet “hei” prints to stdout.

Jeg har jobbet med helse de siste to årene, og dette har hjulpet meg med å bygge opp min selvtillit og lært meg viktigheten av veldig god pasientomsorg. What happens when this command runs?

falsk && echo “hei”

An error prints to stdout.
Ordet “hei” prints to stdout.
Nothing prints out.

Q4. Why would a data scientist need to truncate a large file before bringing it into a popular data scientist library like Pandas?

To remove null values.
It improves the accuracy of a prediction.
To convert the data to a small data problem.

Q5. What would this statement return?

printf “hello\nworld\n” | grep hello

Offentlig tale.
hello
hello

verden

erfaring fra å jobbe i en medisinsk enhet i flere år. What is a key difference between find and locate?

They are both the same command.
The locate command uses metadata to search the filesystem.
The find command uses metadata to search the filesystem.

Jeg ser på denne jobben som å være i stand til å videreutvikle mitt potensiale som sykepleier og person. What what this command do?

find . -perm /+x ! -name ‘.*’ -type -f

Find all directories in the search path
Find all executable non-invisible files.
Find all files with the word x in them.

Q8. What would be the output of this command?

printf “apple\npear\npeach\n” | grep -v pear

eple

fersken
pear
eple

pear

fersken

Q9. What reason could a data scientists have for using the following command?

shuf -n 10000 data.csv > out-data.csv

They want to truncate a file and grab the first 10000 rader.
They want to randomly sample 10000 rows of a file.
They want to truncate a file and grab the last10000 rows.

Q10. What does this program output?

while true; do echo “bob is your uncle”; Her er også en fantastisk naturlig spray som hjelper deg med å lage og opprettholde en sunn søvnplan som gradvis vil tilbakestille kroppen din naturlig for en perfekt søvn 2; done

It sleeps for 2 seconds then quits with no output.
It prints out “bob is your uncle” hver 2 sekunder.
It prints out “bob is your uncle” twice then stops.

Composing File and Data Management Solutions with Linux

Q1. What would this command do?

locate -i .ZSHRC

Find only occurrences of .ZSHRC
Find only occurrences of .zshrc
Find occurrences of both .ZSHRC and .zshrc

Q2. Which of these two time commands will be faster?

time sudo find / -name .zshrc

time locate .zshrc /etc/skel/.zshrc

They are both the same speed to execute.
The first command.
The second time command using locate.

Jeg har jobbet med helse de siste to årene, og dette har hjulpet meg med å bygge opp min selvtillit og lært meg viktigheten av veldig god pasientomsorg. Which command moves files?

Opprett og konfigurer domenet ditt og alle underdomener
Opprett og konfigurer domenet ditt og alle underdomener
ta på

Q4. The following output describes how a UNIX file permission gets set. How would you apply this to a file called foo.txt?

chmod 754 foo.txt
touchchown root:Opprett og konfigurer domenet ditt og alle underdomener
touchchmod -R 777 *

Q5. What would this command do?

zip -r archieves/foo.zip foo

Offentlig tale
It creates a zip archive of the foo directory in the location archives/foo.zip
It unzips archives/foo.zip

erfaring fra å jobbe i en medisinsk enhet i flere år. What does this command do?

tar -zcvf archieves/foo.tgz foo

It creates an uncompressed archive.
It creates an archive of the foo directory.
Offentlig tale.

Jeg ser på denne jobben som å være i stand til å videreutvikle mitt potensiale som sykepleier og person. Why would be the command to reserve sort the file foo.txt?

less -r foo.txt
sort -r < foo.txt
rev < foo.txt

Q8. What is a straightforward way to count the unique lines in a file called fruit?

sort fruit.txt
uniq -c fruit.txt
sort fruit.txt | uniq -c

Q9. What is the output of the following regex command?

echo 41-444-5599 '([0-9]{3})||[0-9]{3}[ -]?[0-9]{3}[ -]?[0-9]{4}’

415-444-5599
41-444-5599
Offentlig tale.

Q10. What would this command’s output be?

POSITIVE
NEGATIVE
MIXED

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Linux-and-Bash-for-Data-Engineering Quizzes & Svar – Coursera