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 ONE if
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Question 2 of 30
Q-2.The relational Algebra is a ____________ Query language.
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Question 3 of 30
Q-3.Double Line indicate_____
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Question 4 of 30
Q-4.Which of the following operation, denoted by cross (×), allows to combine the information from any two relation.
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Question 5 of 30
Q-5.Which of the following operation that allows us to combine certain selections and a Cartesian product into one operation?
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Question 6 of 30
Q-6.Which of the following describe the logical design of the database?
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Question 7 of 30
Q-7.QBE is based on______
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Question 8 of 30
Q-8.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 9 of 30
Q-9.If we want to include attributes from two different relations, which of the following operations is needed?
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Question 10 of 30
Q-10.Which of the following are the fundamental operations in the Relational Algebra?
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Question 11 of 30
Q-11.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 12 of 30
Q-12.An ER diagram can express the overall __________of a database graphically
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Question 13 of 30
Q-13.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 14 of 30
Q-14.Which one of the following allows us to uniquely identify the entity in the entity set?
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Question 15 of 30
Q-15.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 16 of 30
Q-16.For a weak entity set to be meaningful, it must be associated with another entity set called the ___________
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Question 17 of 30
Q-17.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 18 of 30
Q-18.Which of the following take a collection of values and return a single value as a result?
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Question 19 of 30
Q-19.A Super keys for which no proper subset is a super key. Such a minimal Super keys are called _______
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Question 20 of 30
Q-20.Which of the following structure represent the entity sets?
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Question 21 of 30
Q-21.An Entity is a________________
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Question 22 of 30
Q-22.The number of Entity sets that participate in a relationship set is know as ____________ of Relationship
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Question 23 of 30
Q-23.The Relationship sets that involve two entity sets in known as___
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Question 24 of 30
Q-24.The mathematical terms relation tuples
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Question 25 of 30
Q-25.The Domain relational calculus is a ___________Query Language.
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Question 26 of 30
Q-26.For each attributes, there is set of permitted values called______
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Question 27 of 30
Q-27.The tuple relational calculus is a ___________Query Language.
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Question 28 of 30
Q-28.The select operation selects tuples that satisfy a given predicate. We use the lowercase______ to denote selection
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Question 29 of 30
Q-29.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 30 of 30
Q-30.A______is a set of relationships of the same type among several entities
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