Explain the term optimization and performance tuning
Explain the term optimization and performance tuning and its work in practical projects?
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Performance tuning and optimization of a query includes collecting statistics on link columns, ignoring cross product join, selection of suitable primary index (to ignore skewness within storage) and by using secondary index. Ignoring NUSI is advisable.
Describe briefly three types of binary relationships in DBMS?
Explain how the Chasm trap is solved?
Provide a brief differentiation between independent and dependent data warehouse?
Name the main data structures used in these areas: Hierarchical data model, RDBMS and Network data model?
Specify the several types of Strategies?
Explain about the DBMS.
Explain the difference between heterogeneous and homogeneous distributed database?
Write down a short note on the term domain constraints?
Briefly describe the five elements of an Information Systems Architecture and their relationship to data.
When must you seem de-normalization?
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