IBM PureData System for Transactions Technical Mastery Test v1 : P2090-047 Exam Questions

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IBM P2090-047 Exam Syllabus Topics:

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

1. Why is generating statistics on a table important to query performance?

A) The optimizer uses statistics to determine the optimal execution plan for queries.
B) The table statistics are used to facilitate disk space reclamation of deleted rows.
C) The Field Programmable Gate Array (FPGA) utilizes the statistics to identify which row/columns to filter.
D) The Zone Map information cross references the table statistics for each column to avoid scanning.

2. With LDAP enabled, which of the following is verified against an LDAP server?

A) Database user ADMIN privileges.
B) Database user SELECT privileges.
C) Database user GROUP authentication.
D) Database user password authentication.

3. Why is table skew important to manage?

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

4. Within a single PureData System for Analytics, what is the fastest way to copy a 10TB TableA from DatabaseA to another DatabaseB?

A) Use a CTAS (Create Table as Select) SQL statement.
B) Use nzbackup and nzrestore commands.
C) Use external tables and UNIX pipes.
D) Use the COPY command.

5. Which statement is true?

A) EXTERNAL tables can be used to unload data to a Microsoft Windows directory.
B) EXTERNAL table data is deleted using the SQL DELETE command.
C) MATERIALIZED VIEWS can be run against EXTERNAL tables.
D) GENERATE STATISTICS can be run against EXTERNAL tables.

Solutions: