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Exam 1z0-071 topic 1 question 229 discussion

Actual exam question from Oracle's 1z0-071
Question #: 229
Topic #: 1
[All 1z0-071 Questions]

Which four statements are true about constraints on Oracle tables? (Choose four.)

  • A. A PRIMARY KEY constraint can be added after a table has been created and populated.
  • B. A FOREIGN KEY column can contain NULLs.
  • C. A CHECK constraint can refer to values in other rows.
  • D. A NOT NULL constraint can be defined at the table level.
  • E. A UNIQUE constraint can use a pre-existing index on the constrained column or columns.
  • F. A UNIQUE constraint permits NULLs.
  • G. A column can have only one CHECK constraint.
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Suggested Answer: ABEF 🗳️
by CMjer at May 31, 2023, 8:38 a.m.

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Keke0822
4 months ago
Selected Answer: ABCF
I think yall intentionally put the wrong answer! Constraints on Oracle tables include primary key, foreign key, check, and unique constraints. These constraints are used to ensure data integrity and consistency in a database.
upvoted 1 times
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yaya32
10 months, 3 weeks ago
Selected Answer: ABEF
ABEF seems correct
upvoted 1 times
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lucemqy
1 year, 1 month ago
Selected Answer: ABEF
ABEF is correct
upvoted 1 times
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fasolazgrochem
1 year, 3 months ago
Selected Answer: ABEF
ABEF are corecct
upvoted 3 times
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Orxan_H
1 year, 5 months ago
Selected Answer: BCEF
For my opinion correct answers BCEF
upvoted 1 times
lucemqy
1 year, 1 month ago
Check constraint can't refer to other columns
upvoted 1 times
mrcsp
10 months, 1 week ago
If it's a table constraint it can. create table constr ( total_lectures number(10), total_absences number(10), check (total_lectures >= total_absences) );
upvoted 1 times
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zouve
1 year, 5 months ago
maybe it's ABDEF ?
upvoted 1 times
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CMjer
1 year, 6 months ago
Selected Answer: ABEF
A, B, E, F are true. https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/constraint.html#GUID-1055EA97-BA6F-4764-A15F-1024FD5B6DFE
upvoted 4 times
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