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Quiz testing2
Q. 1 Query optimization is primarily concerned with: a) Designing the database schema. b) Choosing the best way to execute a given query. c) Increasing storage space. d) Ensuring ACID properties. Show Answer Answer: b Q. 5 In the context of query optimization, what does the term “selectivity” mean? a)
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5 In the context of query optimization, what does the term “selectivity” mean? a) The percentage of disk space used by the table. b) The speed at which records are accessed. c) The fraction of records that satisfy a condition. d) The order in which records are stored. <button class=”acc”>Show Answer</button> <div class=”pnl”> <p> Answer:
quiz testing 1
Q. 1 Query optimization is primarily concerned with: a) Designing the database schema. b) Choosing the best way to execute a given query. c) Increasing storage space. d) Ensuring ACID properties. Answer Answer: b Q. 2 Which phase of a DBMS translates a high-level query into a low-level query? a) Normalization phase b) Transaction phase
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