By: Prof. Dr. Fazal Rehman | Last updated: September 23, 2024
Database MCQ’s for teachers test
1. Who proposed the relational model?a) Charles Babbageb) Bill Gatesc) Herman Hollerithd) E.F Codd
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d
2. Primary key must be …a) nullb) non nullc) constantd) none
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B
3. In DBMS, a relation is a …a) subset of the cartesian product of list of domainsb) subset of the cartesian product of list of tuplec) subset of the cartesian product of list of attributesd) subset of the cartesian product of list of relations[su_spoiler title=”Answer – Click Here:” class=”padding: -10px;”]A[/su_spoiler]4. Minimal superkeys are known as …a) candidate keysb) attribute keysc) domain keysd) schema keys
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A
5. Which of the following is not involved in DBMS?
(a) HTML
(b) Application Request
(c) Data
(d) End Users
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(a) HTML
6. What is the degree of a relationship in model?a) number of participating entitiesb) number of rows and columnsc) number of tablesd) number of entities
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A
7. How we organize data in hierarchical model?a) physical structureb) logical struturec) tree like structured) none
