Any set of one or more attributes that collectively allow us to uniquely identify tuples in a relation is termed as a what? MCQ with Answer and Explanation

Question
Any set of one or more attributes that collectively allow us to uniquely identify tuples in a relation is termed as a what?
A. Secondary Key
B. Foreign Key
C. Super Key
D. Local Key
Answer: Option C
Solution (By JKSSB Mock Tests)
A Super Key is any set of attributes within a table that can uniquely identify a row. A candidate key is a minimal super key.
This question belongs to: Computer Database Management System (DBMS)
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Practice More Database Management System (DBMS) Questions

Question #1
Which of the following is a valid constraint in SQL?
A. CHECK
B. FOREIGN KEY
C. All of the above
D. PRIMARY KEY
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Correct Answer: Option C

Explanation:
CHECK, PRIMARY KEY, FOREIGN KEY, UNIQUE, NOT NULL are all constraints in SQL.
This question belongs to: Computer Database Management System (DBMS)
Question #2
What type of entity cannot be uniquely identified by its own attributes alone and must rely on a relationship with a parent entity?
A. Associative Entity
B. Strong Entity
C. Weak Entity
D. Abstract Entity
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Correct Answer: Option C

Explanation:
A Weak Entity is an entity that does not possess its own primary key and depends on an identifying relationship with a strong (owner) entity.
This question belongs to: Computer Database Management System (DBMS)
Question #3
Which schema architecture level describes how the data is physically stored on disk storage media?
A. External Level
B. Conceptual Level
C. Logical Level
D. Internal Level
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Correct Answer: Option D

Explanation:
The Internal (or Physical) level of the three-schema architecture describes the physical storage structure and access paths of the database.
This question belongs to: Computer Database Management System (DBMS)
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