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 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 2 of 30
Q-2.Which of the following are the fundamental operations in the Relational Algebra?
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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 ONE if
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Question 4 of 30
Q-4.An ER diagram can express the overall __________of a database graphically
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Question 5 of 30
Q-5.Diamond Represents______
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Question 6 of 30
Q-6.The tuple relational calculus is a ___________Query Language.
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Question 7 of 30
Q-7.An Entity is a________________
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Question 8 of 30
Q-8.Which of the following uses domain variable that take on values from an attributes domain, rather that values for an entire tuple.?
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Question 9 of 30
Q-9.The relational Algebra is a ____________ Query language.
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Question 10 of 30
Q-10.An entity set may not have sufficient attributes to form a primary key; such an entity set is termed as______
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Question 11 of 30
Q-11.If we want to include attributes from two different relations, which of the following operations is needed?
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Question 12 of 30
Q-12.The Relationship sets that involve two entity sets in known as___
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Question 13 of 30
Q-13.A Database schema, along with primary key and foreign key dependencies, can be depicted pictorially by _________
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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 select operation selects tuples that satisfy a given predicate. We use the lowercase______ to denote selection
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Question 16 of 30
Q-16.QBE is based on______
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Question 17 of 30
Q-17.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 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.For each attribute in the table, there is set of permitted values, called the _____of that Attribute.
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Question 20 of 30
Q-20.An entity is represented by set of ___________
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Question 21 of 30
Q-21.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 22 of 30
Q-22.The Domain relational calculus is a ___________Query Language.
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Question 23 of 30
Q-23.______ should not contain NULL value in its Attribute value.
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Question 24 of 30
Q-24.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 25 of 30
Q-25.A___ in a table represents a relationship among a set of values.
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Question 26 of 30
Q-26.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 27 of 30
Q-27.Which of the following describe the snapshot of the data in the database at a given instant in time?
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Question 28 of 30
Q-28.We shall use the term ________ to denote a candidate key that is chosen by the database designer as the principal means of identifying entities within in an entity set.
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Question 29 of 30
Q-29.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 30 of 30
Q-30.A______is a set of relationships of the same type among several entities
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