With each visit of this Database Management System online Quiz / Practice Test, the list of MCQs / Objective Questions presented will be different, offering you a diverse set of practice opportunities. This variability encourages you to practice extensively, refining the accuracy of your answers and your overall grasp of the content. By utilizing this resource, you can hone your skills and become more adept at managing time constraints during actual exams.
Test Instructions Question type Randomized MCQs.Changes every time you visit the test Total Number of Questions 30 Time Limit 20 Minutes Points 1 Point for each Question
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Question 1 of 30
Q-1.Consider the entity relationship which consists of two entity sets, customer and loan, related through a binary relationship set borrower. A directed line(->) from the relationship set borrower to the entity set loan specified that borrower is either a_________ or _______ relationship.
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Question 2 of 30
Q-2.An ER diagram can express the overall __________of a database graphically
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Question 3 of 30
Q-3.The Binary operation Union, denoted, as in the set theory by _____
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Question 4 of 30
Q-4.QBE is based on______
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Question 5 of 30
Q-5.Natural join operation is denoted by symbol____
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Question 6 of 30
Q-6.Ellipses represent_________
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Question 7 of 30
Q-7.For a binary relationship set R between entity sets A and B,the Mapping Cardinality is MANY to ONE if
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Question 8 of 30
Q-8.Consider the entity relationship which consists of two entity sets, customer and loan, related through a binary relationship set borrower. An undirected line (--) from the relationship set borrower to the entity set loan specifies that borrower is either a __________ or __________relationship set from customer to loan.
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Question 9 of 30
Q-9.An entity is represented by set of ___________
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Question 10 of 30
Q-10.__________is a set of entities of same type that share the same properties or attributes.
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Question 11 of 30
Q-11.Which of the following statements stands true? I.A Relational database consists of collection of AttributesII.A Relational Database consists of collections of TablesIII.A relational Database consists of collections of ColumnsIV.A relational Database consists of collections of Rows
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Question 12 of 30
Q-12.An Entity is a________________
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Question 13 of 30
Q-13.Which of the following describes the relation name (table name), attributes, and their names?
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Question 14 of 30
Q-14.An Attribute takes a ________value when an entity does not have a value for it.
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Question 15 of 30
Q-15.The select, project and rename operations are called____
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Question 16 of 30
Q-16.SQL is based on______
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Question 17 of 30
Q-17.For each attributes, there is set of permitted values called______
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Question 18 of 30
Q-18.A______is a set of relationships of the same type among several entities
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Question 19 of 30
Q-19.Suppose we wish to find all customers who have both a loan and an account. Which of the following operation allows us to produce this relation?
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Question 20 of 30
Q-20.Double Rectangle represent_____
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Question 21 of 30
Q-21.Which of the following Statements stands true for Right outer-join?
The left outer join takes all tuples in the left relation that did not match with any tuple in the right relation, pads the tuples with null values for all other attributes from the right relation, and add them to the result of the natural join. It pads tuples from the right relation that did not match any from the left relation with nulls and adds them to the result of the natural join. it pads tuples from the left relation that did not match any from the right relation, as well as tuples from the right relation that did not match any from the left relation, and adding them to the result of join It takes all tuples in the right relation that did not match with any tuple in the right relation, pads the tuples with null values for all other attributes from the right relation, and add them to the result of the natural join.
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Question 22 of 30
Q-22.Dashed ellipses represents_____
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Question 23 of 30
Q-23.An Edge between a entity set and a binary relationship set can have an associated minimum and maximum cardinality, shown in the form of l and h, where l is the minimum and h is the maximum cardinality. What a minimum Cardinality value of 1 indicates?
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Question 24 of 30
Q-24.A_______is a set of one or more attributes that, taken collectively; allow us to identify uniquely an entity in the entity set.
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Question 25 of 30
Q-25.Which of the following describe the logical design of the database?
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Question 26 of 30
Q-26.Which one of the following allows us to uniquely identify the entity in the entity set?
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Question 27 of 30
Q-27.Which of the following are the fundamental operations in the Relational Algebra?
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Question 28 of 30
Q-28.The mathematical terms relation tuples
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Question 29 of 30
Q-29.The Project operation selects tuples with some attributes that we wish to include but some attribute we do not want to include in the final relation. We use the lowercase______ to denote Project operation.
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Question 30 of 30
Q-30.It is convenient at times to write a relational algebra expression by assigning parts of it to temporary relation variables. Which of the following operation will be used for that?
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