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IBM PureData System for Transactions Technical Mastery Test v1 Sample Questions:

1. Why is table skew important to manage?

A) Low table skew negatively impacts data compression.
B) Low table skew negatively impacts performance.
C) Deleted rows consume disk space until they are freed.
D) High table skew negatively impacts performance.

2. Which statement is true about the groom feature?

A) Groom reorders rows based on the DISTRIBUTE ON clause.
B) Groom allows the user to add row level security.
C) Groom allows the user to reorganize tables based on the ORGANIZE ON clause.
D) Groom validates primary key constraints on the table.

3. nzbackup/nzrestore with the -user option has been replaced with which option to allow multi-level security (MLS) information, such as categories, cohorts, and levels to be backed up/restored?

A) -users
B) -mls
C) -globals
D) -all

4. Which two statistical data points are automatically updated when performing an INSERT on a table? (Choose two.)

A) The number of NULLs in each column.
B) The number of unique values in each column.
C) The number of rows in the table.
D) The column histogram statistics.
E) The minimum and maximum column value information (excluding text columns).

5. When a CREATE TABLE AS (CTAS) is performed on a table creating more than 1,000,000,000 rows, which statement is true?

A) Statistics will automatically be generated.
B) Groom will be automatically invoked.
C) Materialized views will be automatically generated.
D) Primary key constraints will be checked.

Solutions: