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

1. What is a benefit of Clustered Base Tables?

A) Materializes on disk joins between tables.
B) Replicates base table data.
C) Increases the performance of load operations.
D) An alternate way to order a table's data.

2. Which User Defined Function (UDF)statement is true?

A) It accepts zero or more input values and produces one or more output values.
B) It accepts zero or more input values but produces one output value.
C) it accepts exactly one input value and produces one or more output values.
D) It accepts exactly one input value and produces exactly one output value.

3. Which is NOT a way to check if the database is online?

A) nzsystem showState
B) nzstate
C) cat /proc/database
D) nzsql -c "select * from _v_system_info;"

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

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

5. Which will result in support for zonemaps on the LastName column?

A) CREATE TABLE TableA (LastName VARCHAR(20));
ALTER TABLE TableA ZONEMAP ON (LastName);
B) CREATE TABLE TableA (LastName VARCHAR(20)) DISTRIBUTE ON (LastName);
C) CREATE TABLE TableA (LastName VARCHAR(20));
CREATE MATERIALIZED VIEW ViewA AS SELECT * FROM TableA ORDER BY
LastName;
D) CREATE TABLE TableA (LastName VARCHAR(20));

Solutions: