Physical Database Design(Ict-Basic)Q1

The fastest read/write time and most efficient data storage of any disk array type is:

1 Mark(s)

Selecting a data type involves which of the following?

1 Mark(s)

A rule of thumb for choosing indexes for a relational database includes which of the following?

1 Mark(s)

Do not specify a unique index for the primary key of each table.
Be careful indexing attributes that have null values.
Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries.
Indexes are more useful on smaller tables.

What is the best data type definition for Oracle when a field is alphanumeric and has a fixed length?

1 Mark(s)

Which of the following is not a factor to consider when switching from small to large block size?

1 Mark(s)

Which of the following is an advantage of partitioning?

1 Mark(s)

The blocking factor is:

1 Mark(s)

Which of the following are integrity controls that a DBMS may support?

1 Mark(s)

A multidimensional database model is used most often in which of the following models?

1 Mark(s)

. If a denormalization situation exists with a many-to-many or associative binary relationship, which of the following is true?

1 Mark(s)

Sequential retrieval on a primary key for sequential file storage has which of the following features?

1 Mark(s)

What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary?

1 Mark(s)

A secondary key is which of the following?

1 Mark(s)

If a denormalization situation exists with a one-to-one binary relationship, which of the following is true?

1 Mark(s)

Which of the following improves a query's processing time?

1 Mark(s)

Physical Database Design(Ict-Basic)Q1 : Question 1 of 15