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CIW 1D0-541 Exam - Topic 8 Question 115 Discussion

Which type of relational integrity is violated if a primary key in a database has a null value?
A) Entity integrity
B) Domain integrity
C) Domain constraints
D) Referential integrity

CIW 1D0-541 Exam - Topic 8 Question 115 Discussion

Actual exam question for CIW's 1D0-541 exam
Question #: 115
Topic #: 8
[All 1D0-541 Questions]

Which type of relational integrity is violated if a primary key in a database has a null value?

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Suggested Answer: A

by Cordelia at Aug 04, 2025, 03:26 AM

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Cherilyn
8 months ago
I always mix those up, thanks for clarifying!
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Mozell
8 months ago
Wait, is that really the case? I thought it was referential integrity.
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Mammie
9 months ago
It's definitely entity integrity that's violated.
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Millie
9 months ago
Totally agree, primary keys can't be null!
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Troy
9 months ago
Yup, entity integrity is the right answer.
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Thea
9 months ago
I feel like I've seen a question similar to this, and it was definitely about entity integrity being violated with null primary keys.
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Stephen
9 months ago
I'm a bit confused; I thought domain integrity was related to the values in the columns, not the primary key itself.
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Tom
10 months ago
I remember practicing a question about primary keys and integrity constraints, and I think entity integrity was the right answer there too.
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Leigha
10 months ago
I think it's entity integrity that gets violated when a primary key has a null value, but I'm not entirely sure.
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Jerilyn
10 months ago
This is a classic database design question. A null primary key definitely violates entity integrity, since the primary key is supposed to uniquely identify each record. I'm confident that's the right answer here.
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Reita
10 months ago
I'm a little confused on the differences between the different types of relational integrity. I'll have to review my notes to make sure I understand which one applies to a null primary key.
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Annmarie
10 months ago
Okay, let me think this through. If a primary key has a null value, that means there's no unique identifier for that record, which would violate the entity integrity constraints. I'm pretty sure that's the right answer.
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Rebecka
11 months ago
Hmm, I'm not totally sure about this one. I know primary keys are important for maintaining data integrity, but I'm not confident which specific type of integrity is violated by a null primary key.
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Leonida
11 months ago
This one seems straightforward - a primary key should never be null, so the answer must be entity integrity.
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Vonda
11 months ago
I disagree, I believe it's D) Referential integrity.
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Maile
1 year ago
A null primary key? That's like trying to find Bigfoot with a blindfold on!
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Norah
11 months ago
A null primary key violates entity integrity.
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Gianna
1 year ago
I think it's A) Entity integrity.
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