Recent questions tagged database-design

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Specialization process does not allowto define a set a sub classes of an entity type.to establish additional specific attributes with each subclass.to define a generalize...
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Assume a one-to-many relationship from table named "authors" to the table named "books". Where should the foreign key reside in an optimal design for this relationship?In...
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What will be the right sequence of the phases of database design-Physical DesignConceptual DesignLogical DesignRequirement collection and analysisChoose the correct answe...
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Arrange the following phases of database design in the correct order:Physical DesignConceptual DesignLogical DesignRequirement AnalysisChoose the correct answer from the ...
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Which of the following is/are NOT CORRECT statement?The first record in each block of the data file is known as actor record.Dense index has index entries for every searc...
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Consider the following relations $\mathrm{X}(\mathrm{S}, \mathrm{Si}, \mathrm{C})$ and $\mathrm{Y}(\mathrm{S}, \mathrm{P}, \mathrm{D})$.\[X =\begin{array}{|c|c|c|}\hlineS...
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Suppose the relationship between customers and products are stored in a table BOUGHT (CUST, PROD, QT) such that there is a tuple $(c, p, n) \in$ BOUGHT if and only if the...
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Let's take an example of student entity typeNameClassSectionAddress (Line1, Line2, City, State, Country, PinCode)Since composite attribute holds multiple atomic attribute...
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The total cost of retrieving records in sorted order using an unclustered $\mathrm{B}+$ tree is (P-Average number of records per data pageN- Data pagesF- Ratio of the siz...
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Consider the following statements:A database design is in BCNF if each member of the set of relation schemas that constitutes the design is in BCNFA BCNF schema can have ...
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Which of the following database model, we have a parent-child relationshipA. hierarchical databasesB. network databasesC. relational databasesChoose the correct answer fr...
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Consider the following statements:Statement $\text{I}$: Composite attributes cannot be divided into smaller subparts.Statement $\text{II}$: Complex attribute is formed by...
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which is best book for DBMS korth or navathe ?since i know that both book is great but i wanted to follow 1 particular book that is easy to understand and simple language...
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Consider a relation $\text{R}$ with attributes $\{ \text{A, B, C} \}$ and functional dependency set $\text {S= \{ A} \rightarrow \text{B, } \text{A} \rightarrow \text{C} ...
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Assume that a $\text{DBA}$ issued the following create table command : create table $\text{A (Aid, $\dots\dots$)}$storage $\text{ (initial 20480, next 20480, maxextents 8...
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Under a relational database if table A has a foreign key constraint referencing to another table B, then Each tuple in A is related to zero or one tuple of B.Each tuple i...
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Which statement is false regarding data Independence:Hierarchical data model suffers from data Independence.Network model suffers from data Independence.Relational model ...
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Which data management language component enabled the DBA to define the schema components?$\text{DML}$Subschema $\text{DLL}$Schema $\text{DLL}$All of these
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In a relational schema, each tuple is divided in fields called :RelationsDomainsQueriesAll the above
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The completeness constraint has rules :Supertype, SubtypeTotal specialization, Partial specializationSpecialization, GeneralizationAll of the above
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An attribute $A$ of datatype varchar $(20)$ has value 'Ram' and the attribute $B$ of datatype char $(20)$ has value 'Sita' in oracle. The attribute $A$ has ________ memor...
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The schema for the entire database is designed using Data definitional languageStructured query languageData manipulation language Schema structure language
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Couple of the good database design principles suggest that preservation and minimization of functional dependencies. These issues can be resolved byEliminating transitive...
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The normalization is a way to implementGood software engineering principlesGood database design principlesStructured Query LanguageDatabase Schema
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In DBMS, the only association would satiate the complete interrelationships set of business processes and in object oriented paradigm, the inter relationships are enhance...
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Explain the distinction between total and partial constraints.
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Explain the distinction between disjoint and overlapping constraints.
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Explain the distinction between condition-defined and user-defined constraints.Which of these constraints can the system check automatically?Explain your answer.
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Design a generalization-specialization hierarchy for a motor vehicle salescompany. The company sells motorcycles, passenger cars, vans, and buses.Justify your placement o...