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GATE 2020 : Database Quiz 1

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Question 1

An athlete can play on several teams and each team needs atleast one player.

Based on the description above, what is the maximum cardnality between each instance of “Athelete” and “team”?

Question 2

In ER-model , weak entity meets which of the following conditions is true?

Question 3

A key that is chosen by the database designer as the principal means of identifying entities within an entity set is called a

Question 4

An air company operates multiple daily flights between cities. Each flight has origin city destination city and a departure time. We want to keep track of all flights between a given pair of cities on a particular day.
Which of the following is correct ER diagram for above statement?

Question 5

Which of the following statements is true?

Question 6

When number of entities are bought together into one entity based on their similar characteristics, what is this process called

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GATE & PSU CS Databases

Feb 10GATE & PSU CS