Cyber Monday 2024! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25
Welcome to Pass4Success

- Free Preparation Discussions
Mail Us support@pass4success.com
Location PL
Mob_nav_barsMENU

CompTIA Exam DS0-001 Topic 1 Question 7 Discussion

Actual exam question for CompTIA's DS0-001 exam
Question #: 7
Topic #: 1
[All DS0-001 Questions]

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

Show Suggested Answer Hide Answer
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 Shawna at Oct 22, 2023, 04:03 PM

Limited Time Offer

25%

Off

Get Premium DS0-001 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel
Laura
8 months ago
I was about to say C) Unique key, but then I remembered that's more for ensuring uniqueness, not referential integrity. Foreign key is the clear winner here. Although, sometimes I wish the exam questions were as straightforward as 'which key is used to enforce referential integrity?' *laughs*
upvoted 0 times
...
Rebbecca
8 months ago
Hmm, I was leaning towards D) Primary key at first, but you both make a good point. Foreign key is the way to go for referential integrity. Can't have those dangling relationships, am I right?
upvoted 0 times
...
Billy
8 months ago
Definitely B) Foreign key. That's the key that links tables together and ensures we don't have any orphaned records. Gotta keep that data squeaky clean!
upvoted 0 times
...
Asha
8 months ago
Ah, the age-old question of enforcing referential integrity! This is a tricky one, but I think the answer is B) Foreign key. That's the constraint that ensures data in one table references valid data in another related table, right?
upvoted 0 times
...

Save Cancel
az-700  pass4success  az-104  200-301  200-201  cissp  350-401  350-201  350-501  350-601  350-801  350-901  az-720  az-305  pl-300  

Warning: Cannot modify header information - headers already sent by (output started at /pass.php:70) in /pass.php on line 77