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CompTIA DS0-001 Exam - Topic 1 Question 1 Discussion

Actual exam question for CompTIA's DS0-001 exam
Question #: 1
Topic #: 1
[All DS0-001 Questions]

Which of the following constraints is used to enforce referential integrity?

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Suggested Answer: B

The constraint that is used to enforce referential integrity is foreign key. A foreign key is a column or a set of columns in a table that references the primary key of another table. A primary key is a column or a set of columns in a table that uniquely identifies each row in the table. Referential integrity is a rule that ensures that the values in the foreign key column match the values in the primary key column of the referenced table. Referential integrity helps maintain the consistency and accuracy of the data across related tables. The other options are either different types of constraints or not related to referential integrity at all. For example, a surrogate key is a column that is artificially generated to serve as a primary key, such as an auto-increment number or a GUID (Globally Unique Identifier); a unique key is a column or a set of columns in a table that uniquely identifies each row in the table, but it can have null values unlike a primary key; there is no such constraint as TID.Reference:CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.2 Given a scenario, execute database tasks using scripting and programming languages.


by Detra at Oct 08, 2023, 05:02 PM

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Odelia
3 months ago
Wait, are you sure about that?
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Helga
3 months ago
Yup, Foreign key is the way to go!
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Barney
3 months ago
Surrogate keys don't enforce that.
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Roselle
4 months ago
I thought it was the Primary key?
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Twana
4 months ago
Definitely a Foreign key!
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Kenny
4 months ago
I feel like unique keys are important too, but for referential integrity, I believe it’s mostly about foreign keys.
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Gwenn
4 months ago
I’m a bit confused; I thought primary keys were also important for integrity, but maybe they serve a different purpose?
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Chery
4 months ago
I remember practicing a question like this, and I think the foreign key is definitely the right answer for enforcing referential integrity.
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Monte
5 months ago
I think referential integrity is related to foreign keys, but I'm not completely sure if that's the only constraint involved.
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Izetta
5 months ago
I'm a bit confused on this one. I know referential integrity is important, but I'm not sure which constraint is specifically used for that. I'll have to review my notes on database design to refresh my memory.
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Jannette
5 months ago
Okay, let me think this through step-by-step. Referential integrity means ensuring that data in one table is consistent with data in another related table. The foreign key constraint is used to create that link between tables and enforce that integrity. I'm confident the answer is B, foreign key.
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Kara
5 months ago
Hmm, I'm a little unsure about this one. I know foreign key has something to do with referential integrity, but I can't quite remember the exact definition. I'll have to think this through carefully.
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Janella
5 months ago
This one seems pretty straightforward. I'm pretty sure the answer is foreign key, since that's the constraint used to enforce referential integrity between tables.
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Virgina
5 months ago
Hmm, I'm a bit unsure about the transactions part. I think the sqlite3 module does support transactions, but I'll need to double-check that. The other options seem straightforward, though.
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Carman
5 months ago
I'm a little confused on the different NETCONF datastores and which one is locked. I'll have to review my notes to make sure I understand this concept.
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Janae
5 months ago
'recovery-timeout' and 'oos-check' seem like the most relevant options here. I'll go with those.
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Jina
5 months ago
This seems like a straightforward question. I'd go with option A - setting up a budget alert on the project. It's the simplest solution and should get the job done.
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Talia
5 months ago
I'm a little confused by the wording of this question. I'll need to double-check my understanding of the knowledge areas to make sure I select the correct answers.
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