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Linux Foundation LFCS Exam - Topic 5 Question 110 Discussion

When given the following command line.echo "foo bar" | tee bar | catWhich of the following output is created?
B) foo bar
A) cat
C) tee bar
D) bar
E) foo

Linux Foundation LFCS Exam - Topic 5 Question 110 Discussion

Actual exam question for Linux Foundation's LFCS exam
Question #: 110
Topic #: 5
[All LFCS Questions]

When given the following command line.

echo "foo bar" | tee bar | cat

Which of the following output is created?

Show Suggested Answer Hide Answer
Suggested Answer: B

by Mi at Mar 07, 2026, 03:55 PM

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Clorinda
17 days ago
No, tee just duplicates the input. B is definitely correct!
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Annalee
22 days ago
But what about C) tee bar? It seems like a possible output too.
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Curt
27 days ago
Yeah, I agree! The echo command sends "foo bar" to tee.
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Queenie
1 month ago
I think the output is B) foo bar.
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Rebeca
1 month ago
Nah, definitely B) foo bar. The command pipes it correctly.
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Georgeanna
1 month ago
But what about A) cat? It seems like a trick option.
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Ming
2 months ago
I agree, B) makes sense. It shows the full output.
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Lai
2 months ago
I think the output is B) foo bar.
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Talia
2 months ago
Nah, definitely B) foo bar. The command pipes it correctly.
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Keena
2 months ago
But what about A) cat? It seems like a trick option.
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Martin
2 months ago
I agree, B) makes sense. It shows the full output.
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Lindy
2 months ago
I think the output is B) foo bar.
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Nina
3 months ago
It's "foo bar", no doubt about it!
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Long
3 months ago
I thought it would just be "bar".
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Lanie
4 months ago
Wait, are you guys sure? What about the "tee" command?
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Erasmo
4 months ago
I agree, it's "foo bar" for sure!
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Clarence
5 months ago
The output is definitely "foo bar".
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Jimmie
5 months ago
It's "foo bar", no doubt about it!
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Bok
5 months ago
I thought it would just be "bar".
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Kris
5 months ago
Wait, are you guys sure? What about the "tee" command?
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Cecil
5 months ago
I agree, it's "foo bar" for sure!
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Elliot
6 months ago
The output is definitely "foo bar".
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Tori
6 months ago
I feel like the answer is B) foo bar, but I might be mixing it up with another command. I need to double-check how piping works here.
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Glenn
6 months ago
I'm a bit confused about the options. Does tee actually output to both the terminal and the file? I can't recall if it affects the final output.
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Brigette
6 months ago
I remember practicing a similar question where tee was involved, and it seemed to duplicate the output. Maybe it outputs "foo bar" as well?
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Katina
6 months ago
I think the output should be "foo bar" since that's what gets echoed, but I'm not entirely sure how tee works in this context.
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