Introduction to Database System Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that: A → A → (B,C). (B,C) → A → A → A → (B,C). (B,C) → A → ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A database has data and relationships. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Updating a database means reorganizing the database all of the listed here modifying or adding record occurrences revising the file structure reorganizing the database all of the listed here modifying or adding record occurrences revising the file structure ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a large DBMS all of the listed here each user can "see" only a small part of the entire database each user can access every sub¬schema each subschema contains every field in the logical schema all of the listed here each user can "see" only a small part of the entire database each user can access every sub¬schema each subschema contains every field in the logical schema 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 None of these if high, reduces processing efficiency for sequential and nonsequential files is a measure of the percentage of existing records updated during a run refers to how closely the files fits into the allocated is a low percentages of number of records added or deleted from a file None of these if high, reduces processing efficiency for sequential and nonsequential files is a measure of the percentage of existing records updated during a run refers to how closely the files fits into the allocated ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A race condition occurs when Both of the listed here None of the listed here Two concurrent activities interact to cause a processing error two users of the DBMS are interacting with different files at the same time Both of the listed here None of the listed here Two concurrent activities interact to cause a processing error two users of the DBMS are interacting with different files at the same time ANSWER DOWNLOAD EXAMIANS APP
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