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

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

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

2. In order to set a runaway query event totrigger when a query runs longer than two minutes, which two items must be configured? (Choose two.)

A) The runaway query event was enabled.
B) The nzsystem command was used to set the QUERYTIMEOUT to two minutes.
C) The pg.log file was configured for two minutes.
D) The runaway query event was configured for two minutes.
E) The CREATE USER command was used to set the QUERYTIMEOUT to two minutes.

3. When is the ToplogyImbalance event triggered?

A) When the path the path between an S-Blade and its disks has failed.
B) When a disk enclosure's voltage sensor is reading outside the nominal range.
C) When a SAS switch has failed.
D) When an S-Blade has ownership of more dataslices than is optimal (usually following a disk replacement).

4. A SELECT statement spends all its time returning 1 billion rows.What can be done to make this faster?

A) Use a CURSOR.
B) Increase the PreFetch Count.
C) Use the COPY command.
D) Use an EXTERNAL table.

5. What is true about queries submitted on the PureData System for Analytics Appliance?

A) Queries are consolidated by the host and executed together in one block.
B) Queries are uncompressed by the host and sent to the user.
C) Queries are compiled by the host and executed in parallel by the S-Blades.
D) Queries are compressed by the host and optimized for parallel processing.

Solutions: