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CIW 1D0-541 Exam - Topic 8 Question 120 Discussion

Which relational algebraic operation is used to select specific columns (attributes) from arelation?
C) Projection
A) Union
B) Difference
D) Intersection

CIW 1D0-541 Exam - Topic 8 Question 120 Discussion

Actual exam question for CIW's 1D0-541 exam
Question #: 120
Topic #: 8
[All 1D0-541 Questions]

Which relational algebraic operation is used to select specific columns (attributes) from a

relation?

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Suggested Answer: C

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

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Erinn
4 months ago
I agree, Projection is used for that. It’s clear in the definitions.
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Nguyet
4 months ago
I was confused between Projection and Union, but Projection makes sense.
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Robt
4 months ago
Yeah, Projection is definitely the right choice. It selects specific columns.
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Bettye
4 months ago
I think it's C) Projection.
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Marva
4 months ago
Projection is the one that selects columns, no doubt!
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Natalie
4 months ago
Wait, are you sure it's not D) Intersection?
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Kimberely
5 months ago
Totally agree, C) Projection is the right answer!
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Sarah
5 months ago
I thought it was A) Union at first.
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Dante
5 months ago
It's definitely C) Projection.
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Ailene
5 months ago
Projection, all the way. Anything else would just be a hot mess.
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Jennifer
5 months ago
Projection is the way to go. Gotta keep things streamlined, you know?
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Farrah
5 months ago
Projection is the way to go. Wouldn't want to end up with a bunch of extra columns, am I right?
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Erasmo
6 months ago
Projection, definitely. Anything else would just be a mess.
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Phuong
6 months ago
Hmm, I'd say Projection is the way to go. Keeps things nice and tidy.
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Cordelia
7 months ago
Projection, of course! Gotta get those specific columns, am I right?
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Vilma
7 months ago
I feel like Projection is the answer, but I might confuse it with something else like Selection, which is for rows.
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Shawnda
7 months ago
Union and Intersection are definitely for combining sets, but I can't recall if Projection is the exact term for selecting columns.
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Desiree
7 months ago
I remember practicing a question similar to this, and I believe Projection was the right answer.
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Wai
7 months ago
I think the operation for selecting specific columns is called Projection, but I'm not entirely sure.
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Fannie
7 months ago
I'm a little unsure between the projection and intersection operations here. I know projection has something to do with selecting columns, but I can't quite remember the details. I'll have to review my notes before answering this.
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Malcom
8 months ago
The projection operation, that's the one I was thinking of. It lets you choose which attributes or columns you want to keep from a relation. I feel confident about this one.
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Detra
8 months ago
Okay, I remember learning about the different relational algebra operations. I'm pretty sure the projection operation is the one that allows you to select specific columns from a relation. I'll mark that as my answer.
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Jani
8 months ago
Hmm, I'm a bit confused on this one. Is it the projection operation that selects columns? Or maybe it's the union operation? I'll have to think this through carefully.
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Twila
8 months ago
I think the projection operation is used to select specific columns from a relation, but I'm not 100% sure.
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Gracia
2 months ago
Definitely! Projection is the right choice.
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Kris
2 months ago
Yeah, Projection makes sense for selecting columns.
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Jerry
2 months ago
I believe it's Projection too!
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