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TeraData HCIA-Datacom V1.0 Sample Questions:

1. At a large car manufacturer, huge volumes of diagnostic data for cars are collected in the following table:

The master data for each car is stored in the following table:

Many reports require data from both tables by joining via column VehicleId.
A very frequently performed query on the system returns the number of events by FaultCode and ModelType. This query consumes many CPU and I/O resources each day.
Which action should the Administrator take to improve the runtime and resource consumption for this query?

A) Use an aggregate join index with columns FaultCode, ModelType, as well as an appropriate aggregate function.
B) Use a NUSI on VehicleEvent.FaultCode and a NUSI on Vehicle.ModelType
C) Use a single table join index on VehicleEvent hashed by FaultCode and another single table join index on Vehicle hashed by ModelType.
D) Use a sparse join index with columns FaultCode and ModelType, as well as an appropriate filter function.

2. An application is consuming very high I/O on Teradata Vantage. The Administrator has been asked to identify the queries that are consuming more than 100 million IOs and are suspected of completing Full Table Scans or Large Redistribution.
Which metrics should be examined for high values to identify the queries?

A) I/O SKEW % and UII
B) MAXAMPIO and PJI
C) REQPHYSIO and UII
D) TOTALIOCOUNT and PJI

3. An Administrator has created a new view, ViewDB.SystemMetrics, that combines and aggregates several key system metrics. The data is non-secure in nature, and the intent is for all Vantage users to have SELECT access to it.
Which statement can the Administrator execute to meet this goal?

A) GRANT SELECT ON ViewDB.SystemMetrics TO DEFAULT;
B) GRANT SELECT ON ViewDB.SystemMetrics TO PUBLIC;
C) GRANT SELECT ON ViewDB.SystemMetrics TO ALL;
D) GRANT SELECT ON ViewDB.SystemMetrics TO DBC;

4. An Administrator manages a Vantage system that is continually updated. The system is critical to the business and must be available as much as possible. The Administrator decides to use a backup strategy that will allow changes to tables while a backup is in progress.
Which backup strategy should be used?

A) Online
B) Offline
C) Skip statistics
D) Dictionary Only

5. A table that contains about two billion records is showing a bad response time for range-based queries on the order date column and frequently projects 10 out of 100 columns. The Administrator decides to convert the table to a column and row partitioned table.
Which resource is constrained?

A) Space
B) AWT
C) I/O
D) CPU

Solutions:

Question # 1 Answer: A

Question # 2 Answer: D

Question # 3 Answer: B

Question # 4 Answer: A

Question # 5 Answer: C