Database Management System (DBMS) MCQs with answers Page - 49

Here, you will find a collection of MCQ questions on Database Management System (DBMS). Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

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Q. _______ allow us to identify uniquely a tuple in the relation.

  • (A) schema
  • (B) superkey
  • (C) domain
  • (D) attribute

A

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Q. Minimal Superkeys are called

  • (A) schema keys
  • (B) attribute keys
  • (C) candidate keys
  • (D) domain keys

A

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Q. Which of the following is not Modification of the Database

  • (A) updating
  • (B) sorting
  • (C) deletion
  • (D) insertion

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Q. Which of the following in not Outer join?

  • (A) left outer join
  • (B) full outer join
  • (C) all of the options
  • (D) right outer join

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Q. Set of premitted values of each attribute is called

  • (A) tuple
  • (B) schema
  • (C) domain
  • (D) relation

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Q. Which of the following is true regarding Null Value?

  • (A) null<0
  • (B) null=0
  • (C) null<>0
  • (D) null>0

A

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Q. Logical design of database is called

  • (A) all of the options
  • (B) database schema
  • (C) database instance
  • (D) database snapshot

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Q. Snapshot of the data in the database at a given instant of time is called

  • (A) database instance
  • (B) all of the options
  • (C) database schema
  • (D) database snapshot

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Q. Which of the following is not Unary operation?

  • (A) rename
  • (B) union
  • (C) select
  • (D) project

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Q. Which of the following is not binary operation?

  • (A) union
  • (B) set difference
  • (C) cartesian product
  • (D) project

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