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.The select, project and rename operations are called____
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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.For a binary relationship set R between entity sets A and B,the Mapping Cardinality is ONE TO MANY if
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Question 4 of 30
Q-4.Which of the following is the Binary Operations?
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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.An Entity is a________________
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Question 7 of 30
Q-7.______ should not contain NULL value in its Attribute value.
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Question 8 of 30
Q-8.The select operation selects tuples that satisfy a given predicate. We use the lowercase______ to denote selection
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Question 9 of 30
Q-9.______ is the restrictions imposed to maintain the data integrity of the database
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Question 10 of 30
Q-10.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 11 of 30
Q-11.An entity is represented by set of ___________
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Question 12 of 30
Q-12.For example Loan-number attribute for a specific loan entity set is referred to as
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Question 13 of 30
Q-13.In a Entity sets Customer and Loan, an Attribute name consisting of first-name ,middle-name, and last-name. An Attribute name is _______
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Question 14 of 30
Q-14.The number of Entity sets that participate in a relationship set is know as ____________ of Relationship
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Question 15 of 30
Q-15.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 16 of 30
Q-16.The tuple relational calculus is a ___________Query Language.
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Question 17 of 30
Q-17.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 18 of 30
Q-18.Which of the following operation that allows us to combine certain selections and a Cartesian product into one operation?
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Question 19 of 30
Q-19.The Domain relational calculus is a ___________Query Language.
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Question 20 of 30
Q-20.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 21 of 30
Q-21.Consider an employee entity set with the attribute phone-number, attribute phone-number is a ________
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Question 22 of 30
Q-22.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 23 of 30
Q-23.Double ellipses represents_____
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Question 24 of 30
Q-24.Suppose we want to list all loan numbers and the amount of the loans, but do not care about the branch name. Which of the following operation allows us to produce this relation?
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Question 25 of 30
Q-25.Which of the following operation, denoted by cross (×), allows to combine the information from any two relation.
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Question 26 of 30
Q-26.Which of the following describe the logical design of the database?
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Question 27 of 30
Q-27.__________ is the snapshot of the relation at a particular time. It consists of the data which is present inside the relation at a particular instance of time. Duplicate row entries are not allowed in the _____. Though in SQL, duplicate rows are allowed in the table.
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Question 28 of 30
Q-28.Which of the following Statements stands true for Full 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 29 of 30
Q-29.Diamond Represents______
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Question 30 of 30
Q-30.A______is a set of relationships of the same type among several entities
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