Exam Questions P

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1 Exam Questions P IBM PureData System for Transactions Technical Mastery Test v1

2 1. A group has a resource allocation maximum of 50% and the job maximum is set to 1. Two users within this resource group each execute 1 job at the same time, which statement is correct? A. Each job gets 25% and both run at the same time. B. Each job gets 50% but only one job runs at a time. C. Each job gets 50% and both run at the same time. D. You cannot set the job maximum per resource group. 2. TableA is currently being accessed in a number of long running queries. Which of the following operations is NOT blocked, thus allowing the operation to immediately proceed? A. DROP TABLE TableA B. ALTER TABLE TableA C. TRUNCATE TABLE TableA D. GRANT SELECT ON TableA TO UserA Answer: D 3. Why is table skew important to manage? A. Low table skew negatively impacts performance. B. High table skew negatively impacts performance. C. Low table skew negatively impacts data compression. D. Deleted rows consume disk space until they are freed. 4. What is a benefit of Clustered Base Tables? A. Replicates base table data.

3 B. An alternate way to order a table\'s data. C. Materializes on disk joins between tables. D. Increases the performance of load operations. 5. Which component failure does NOT trigger a HardwareServiceRequested event? A. Fan B. Disk C. Host D. S-Blade 6. Which of the following is a valid datatype definition? A. TEXT B. CLOB C. CHAR(64000) D. NUMERIC(1,38) 7. Using a date column as a distribution key may distribute rows evenly across dataslices, why is this a poor choice of a distribution key? A. Queries on the table will invoke compression. B. Queries on date range may involve processing skew. C. Queries on date range will utilize only host processing. D. Queries on the table will invoke compression on the date columns.

4 8. Which is a function of the Linux-HA heartbeat? A. Performs regeneration of failed disks on the hosts. B. Manages communication and processes on the S-Blades. C. Performs disk partitioning and status of jobs on the S-Blades. D. Manages communication and status of services on the hosts. Answer: D 9. When are zonemaps initially created for a table? A. nzbackup B. nzreclaim C. CREATE TABLE D. ALTER TABLE ADD ZONEMAPS 10. The query history data collected DOES NOT provide insight to which of the type of performance and behavior questions? A. The typical or most common types of queries. B. The longest and shortest running queries on the system. C. The queries submitted by specific users or groups of users. D. The rotational speed of the disk drives during query execution. Answer: D 11. Which condition will NOT fail or restart a running query on a PureData System for Analytics Appliance? A. Disk resets or fails. B. Host resets or fails.

5 C. S-Blade resets or fails. D. Snippet Processing Unit (SPU) resets or fails. Answer: A 12. Which nzload operation statement is correct? A. nzload must have a control file. B. nzload performs singleton inserts. C. nzload user must have CREATE EXTERNAL TABLE privilege. D. nzload must be run from the PureData System for Analytics host. 13. When doing a CREATE SEQUENCE, the largest "maximum value" is based on what? A. BIGINT B. FLOAT8 C. NUMERIC(38,0) D. VARCHAR(256) Answer: A 14. When a CREATE TABLE AS (CTAS) is performed on a table creating more than 1,000,000,000 rows, which statement is true? A. Groom will be automatically invoked. B. Primary key constraints will be checked. C. Statistics will automatically be generated. D. Materialized views will be automatically generated.

6 15. What two characteristics can be changed when using the CREATE TABLE AS (CTAS) statement to copy TableA to TableB? (Choose two.) A. The views on TableA. B. The privileges on TableA. C. The distribution key of TableB. D. The materialized views on TableB. E. The order of the data stored in TableB.,E 16. Which statement is true about data flowing in/out of the PureData System for Analytics Appliance? A. Bypasses the host. B. Flows through the host. C. Compressed on the host. D. Uncompressed on the host. 17. Which condition will interrupt a query running on a fully operational PureData System for Analytics? A. One fan fails. B. One disk fails. C. Active host fails. D. One power supply fails. 18. Which command is used to display operational statistics about system capacity, faults, and

7 performance? A. nzstats B. nzstate C. nzshow D. nzsystem Answer: A 19. Which two characteristics describe materialized views. (Choose two.) A. Materialized views can contain aggregates. B. Materialized views can contain a HAVING clause. C. Materialized views can contain a WHERE clause. D. Materialized views can contain an ORDER BY clause. E. Materialized views can reference only one base table in the FROM clause. Answer: D,E 20. Which command is used to abort a user\'s SQL transaction? A. kill B. abort C. nzstop D. nzsession Answer: D

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