CompTIA PK0-005 Exam - Topic 4 Question 54 Discussion

Actual exam question for CompTIA's PK0-005 exam

Question #: 54
Topic #: 4

Which of the following is a test that is done on an existing system to ensure the previous functionality still works after a change has been made?

ASmoke testing

BRegression testing

CUnit testing

DUser acceptance testing

Show Suggested Answer

Suggested Answer: B

Regression testing is a type of testing that is done on an existing system to ensure that the previous functionality still works after a change has been made. Regression testing is a process of retesting or verifying that a software system or application still performs as expected after it has been modified or updated with new features, bug fixes, patches, etc. Regression testing can help to detect any errors or defects that may have been introduced by the change and ensure that no functionality has been broken or degraded.

by Alpha at Jan 05, 2026, 05:16 AM

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Chaya

16 days ago

Definitely B. It ensures nothing breaks after updates.

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Linette

2 months ago

I was torn between A and B, but B makes more sense.

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Nieves

2 months ago

Agreed! Regression testing is crucial for stability.

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Tequila

2 months ago

I think it's B) Regression testing. It checks old features after changes.

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Elmer

3 months ago

B is correct, but I see why people get confused!

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France

3 months ago

Wait, are you sure it's not C) Unit testing?

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Tien

3 months ago

100% agree with B, that's the right one!

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Reid

3 months ago

I thought it was A) Smoke testing at first.

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Raina

3 months ago

It's definitely B) Regression testing!

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Desmond

3 months ago

Regression testing is the answer, unless you want to end up with a system that's more broken than a cheap toy.

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Rodrigo

4 months ago

Regression testing? More like "regretting the changes" testing, am I right?

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Shantell

4 months ago

Regression testing is the way to go. Wouldn't want to be the one to break the system, am I right?

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Lizbeth

4 months ago

Regression testing is the correct answer. Gotta love those good old regression tests!

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Carin

5 months ago

Regression testing is the answer. Wouldn't want to end up with a bunch of broken functionality.

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Mitsue

5 months ago

Regression testing is the way to go. Can't have the system breaking down after a change, right?

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Lisha

5 months ago

Regression testing, of course! Gotta make sure the old stuff still works after the new stuff is added.

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Tamekia

5 months ago

User acceptance testing is for the end-users, right? So it can't be that one. I feel pretty confident it's regression testing.

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Celestina

5 months ago

I’m torn between regression testing and unit testing. I know unit testing is for individual components, but regression seems to fit better here.

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Elbert

5 months ago

I remember practicing a question like this, and I think smoke testing is more about initial checks, not really about existing functionality.

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Maile

6 months ago

I think it's regression testing because it checks if old features still work after changes. But I'm not completely sure.

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Kirk

6 months ago

Regression testing is the key here. We need to validate the system still works as expected after updates.

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Gianna

6 months ago

I'm a bit confused. Isn't regression testing more about testing the whole system, not just individual units?

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Jacklyn

6 months ago

Regression testing is definitely the right answer here. We want to confirm the previous functionality is still intact.

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Kattie

6 months ago

Hmm, I'm not sure. Could it also be smoke testing to check the basic functionality is still there?

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Ilda

7 months ago

I think this is a regression testing question. We need to make sure the existing functionality still works after changes.

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Glen

4 hours ago

Exactly! Always check after changes.

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Clay

5 days ago

Yeah, we can't afford to break existing features!

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Ivory

10 days ago

I agree, it's definitely regression testing.

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