Introduction to Database System A logical schema describes how data is actually stored on disk All of these is a standard way of organizing information into accessible parts None of these is the entire database describes how data is actually stored on disk All of these is a standard way of organizing information into accessible parts None of these is the entire database ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System To have a file hold a list, it is necessary to identify the records in the list All of the listed here identify the name, width and type of the fields of each record. decide which fields will be used as sort or index keys identify the records in the list All of the listed here identify the name, width and type of the fields of each record. decide which fields will be used as sort or index keys ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A good query system can accept English language commands both (a) and (b) can be accessed only by data processing professionals None of these allows non-programmers to access information stored in a database can accept English language commands both (a) and (b) can be accessed only by data processing professionals None of these allows non-programmers to access information stored in a database ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The activity of a file is a low percentages of number of records added or deleted from a file refers to how closely the files fits into the allocated if high, reduces processing efficiency for sequential and nonsequential files None of these is a measure of the percentage of existing records updated during a run is a low percentages of number of records added or deleted from a file refers to how closely the files fits into the allocated if high, reduces processing efficiency for sequential and nonsequential files None of these is a measure of the percentage of existing records updated during a run ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The modify operation is likely to be done after All of these None of these Delete Insert Look-up All of these None of these Delete Insert Look-up ANSWER DOWNLOAD EXAMIANS APP
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