DBMS-Relational Algebra and Calculus Questions and Answers

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Q21
The father of relation database system is :
  • A Pascal
  • B C.J. Date
  • C Dr. Edgar F. Cord
  • D none of these
Answer: Option C
Q22
Who wrote the paper tieled " A Relational Model of Data for Large shared Data Banks"?
  • A F.R. McFadden
  • B C.J. Date
  • C Dr. Edgar F. Cord
  • D none of these
Answer: Option C
Q23
The first large scale implementation of Codd's relational model was IBM's:
  • A DB2
  • B system R
  • C ingress
  • D none of these
Answer: Option A
Q24
Which of the following is not a relational database system?
  • A ingress
  • B DB2
  • C IMS
  • D sybase.
Answer: Option C
Q25
What is the following is not a relational database system?
  • A tuple
  • B relation
  • C attribute
  • D domain
Answer: Option A
Q26
What is the cardinality of a table with 1000 rows and 10 columns?
  • A 10
  • B 100
  • C 1000
  • D none of these.
Answer: Option C
Q27
What is the cardinality of a table with 5000 rows and 50 columns?
  • A 10
  • B 50
  • C 500
  • D 5000
Answer: Option D
Q28
What is the degree of a table with 1000 rows and 10 columns?
  • A 10
  • B 100
  • C 1000
  • D none of these
Answer: Option A
Q29
What is the degree of a table with 5000 rows and 50 columns?
  • A 50
  • B 500
  • C 5000
  • D none of these
Answer: Option A
Q30
Which of the following keys in a table can uniquely identify a row in a table?
  • A primary key
  • B alternate key
  • C candidate key
  • D all of these.
Answer: Option D

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