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.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 2 of 30
Q-2.A___ in a table represents a relationship among a set of values.
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Question 3 of 30
Q-3.Which of the following take a collection of values and return a single value as a result?
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Question 4 of 30
Q-4.__________is a set of entities of same type that share the same properties or attributes.
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Question 5 of 30
Q-5.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 6 of 30
Q-6.An expression {<X1,X2,….Xn > | P(X1,X2,….Xn)} , Where X1,X2,….Xn represent Domain variable. P represents a formula composed of atoms. This expression is of the of the following?
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Question 7 of 30
Q-7.Dashed ellipses represents_____
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Question 8 of 30
Q-8.The Domain relational calculus is a ___________Query Language.
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Question 9 of 30
Q-9.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 10 of 30
Q-10.The purpose of the foreign key is to identify a particular row of ___________.
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Question 11 of 30
Q-11.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 12 of 30
Q-12.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 13 of 30
Q-13.For each attributes, there is set of permitted values called______
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Question 14 of 30
Q-14.Datalog is based on______
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Question 15 of 30
Q-15.The number of Entity sets that participate in a relationship set is know as ____________ of Relationship
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Question 16 of 30
Q-16.Which of the following Statements stands true for Left 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,abd 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 17 of 30
Q-17.Which of the following operation, denoted by cross (×), allows to combine the information from any two relation.
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Question 18 of 30
Q-18.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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Question 19 of 30
Q-19.SQL is based on______
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Question 20 of 30
Q-20.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 21 of 30
Q-21.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 1 indicates?
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Question 22 of 30
Q-22.Double Line indicate_____
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Question 23 of 30
Q-23.A Super keys for which no proper subset is a super key. Such a minimal Super keys are called _______
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Question 24 of 30
Q-24.An Entity is a________________
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Question 25 of 30
Q-25.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 26 of 30
Q-26.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 27 of 30
Q-27.A______is a set of relationships of the same type among several entities
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Question 28 of 30
Q-28.______ is the restrictions imposed to maintain the data integrity of the database
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Question 29 of 30
Q-29.Which of the following is the Binary Operations?
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Question 30 of 30
Q-30.The tuple relational calculus is a ___________Query Language.
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