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 _______ should be chosen such that its attributes are never, or very rarely changed.
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Question 2 of 30
Q-2.Lets consider the account table .it has three column headers; account-number branch-name balance
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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 MANY to MANY if
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Question 4 of 30
Q-4.An Attribute takes a ________value when an entity does not have a value for it.
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Question 5 of 30
Q-5.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 6 of 30
Q-6.Double Rectangle represent_____
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Question 7 of 30
Q-7.Ellipses represent_________
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Question 8 of 30
Q-8.Datalog is based on______
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Question 9 of 30
Q-9.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 10 of 30
Q-10.For a Binary relationship set R between entity sets A and B, the ________ express the number of entities to which another entity can be associated.
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Question 11 of 30
Q-11.__________ 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 12 of 30
Q-12.For example, the customer entity set has an attribute loan-taken, which represents how many loans a customer has from the bank, the attribute loan-taken is______
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Question 13 of 30
Q-13.Which of the following operation, denoted by cross (×), allows to combine the information from any two relation.
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Question 14 of 30
Q-14.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 15 of 30
Q-15.Which of the following describe the logical design of the database?
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Question 16 of 30
Q-16.__________is a set of entities of same type that share the same properties or attributes.
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Question 17 of 30
Q-17.An entity is represented by set of ___________
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Question 18 of 30
Q-18.Which of the following are the fundamental operations in the Relational Algebra?
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Question 19 of 30
Q-19.A Database schema, along with primary key and foreign key dependencies, can be depicted pictorially by _________
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Question 20 of 30
Q-20.The mathematical terms relation tuples
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Question 21 of 30
Q-21.Which of the following is the Binary Operations?
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Question 22 of 30
Q-22.An ER diagram can express the overall __________of a database graphically
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Question 23 of 30
Q-23.An Entity is a________________
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Question 24 of 30
Q-24.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 Maximum Cardinality value of * indicates?
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Question 25 of 30
Q-25.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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Question 26 of 30
Q-26.Which of the following describe the snapshot of the data in the database at a given instant in time?
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Question 27 of 30
Q-27.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 28 of 30
Q-28.______ should not contain NULL value in its Attribute value.
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Question 29 of 30
Q-29.For a binary relationship set R between entity sets A and B, the Mapping Cardinality is ONE TO ONE if
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Question 30 of 30
Q-30.Which of the following operation allows us to find the tuples that are in one relation but are not in another relation?
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