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TeraData TDVAN5 Exam Syllabus Topics:

Topic	Details
Topic 1	Performance Management: This section of the exam evaluates the skills of TeraData database administrators. It focuses on strategies for managing statistics, implementing DBQL logging, and using performance data to troubleshoot and resolve system issues.
Topic 2	User Administration: This section evaluates the skills of system administrators in meeting user security requirements through roles and proxy access configurations. Candidates will also learn about the functionality and benefits of profiles, as well as the key attributes that should be set for a new user.
Topic 3	Integration: This section tests the skills of database administrators in utilizing integration tools like QueryGrid and NOS. It covers the benefits, features, and functionality of QueryGrid, the database objects supporting its implementation, and the performance implications of accessing NOS and foreign servers.

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TDVAN5 Actual Lab Questions: HCIA-Datacom V1.0 & TDVAN5 Exam Preparatory

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TeraData HCIA-Datacom V1.0 Sample Questions (Q51-Q56):

NEW QUESTION # 51
Partition elimination enhances query performance by skipping row partitions that do not contain rows that meet the search conditions of a query. Without collected statistics for some partitioning expressions, the Optimizer assumes a total of 65,535 partitions. This could easily be far more than the number of populated partitions and would adversely affect performance.
Which form of partitioning will cause the Optimizer to make this assumption?

A. Basing the partitioning expression on two or more numeric columns
B. Partitioning on a character column
C. Basing the partitioning expression on a CASE_N function
D. Basing the partitioning expression on a RANGE_N character column

Answer: C

Explanation:
CASE_N partitioning is a complex form of partitioning that can result in a large number of potential partitions. When statistics are not collected for the partitioning expressions, the Optimizer assumes the worst-case scenario of 65,535 partitions, which can significantly affect query performance.
Option A (Partitioning on a character column) and Option C (Basing the partitioning expression on two or more numeric columns) could affect performance, but they don't lead to the specific assumption of 65,535 partitions unless more complex functions are involved.
Option D (Basing the partitioning expression on a RANGE_N character column) involves range-based partitioning, which is typically more straightforward and doesn't automatically cause the assumption of 65,535 partitions unless complex expressions like CASE_N are used.

NEW QUESTION # 52
The Administrator has received a request to add SELECT rights on the BusinessViews database to end users, developers, and batch accounts in the accounting unit. The following roles are set up for each group:

The Administrator created the AcctShared role and will use it in a role nesting strategy to provide the required access.
Which actions can the Administrator take to fulfill this request?

A. Grant SELECT on BusinessViews to AcctShared, then grant AcctUsers, AcctDev, and AcctBatch to AcctShared.
B. Grant SELECT on AcctShared to BusinessViews, then grant AcctShared to AcctUsers. AcctDev, and AcctBatch.
C. Grant SELECT on AcctShared to BusinessViews, then grant AcctUsers, AcctDev, and AcctBatch to AcctShared.
D. Grant SELECT on BusinessViews to AcctShared, then grant AcctShared to AcctUsers. AcctDev, and AcctBatch.

Answer: D

Explanation:
The AcctShared role should be granted SELECT access on the BusinessViews database. This ensures that the role itself has the necessary privileges.
Then, you can nest this role by granting AcctShared to the individual roles of AcctUsers, AcctDev, and AcctBatch. This role nesting strategy allows the users in these groups to inherit the permissions from AcctShared without having to directly grant the privileges to each individual role.
This approach maintains a clean and efficient permission structure using role nesting.

NEW QUESTION # 53
There is corruption in a table in the DBC database.
Which action should the Administrator take to restore the table?

A. Set the corrupted AMP offline, and restore the entire system.
B. Perform a SYSINIT, and restore the corrupted table.
C. Perform a SYSINIT, and restore the entire system.
D. Set the corrupted AMP offline, and restore the corrupted table.

Answer: D

Explanation:
If a table in the DBC (Data Dictionary) database is corrupted, the proper approach is to set the corrupted AMP offline to isolate the issue, and then restore the corrupted table from a backup. This limits the scope of the recovery to only the affected AMP and table, minimizing the impact on the rest of the system.
Perform a SYSINIT, and restore the corrupted table: A SYSINIT is a full system initialization and should only be done in extreme cases, as it wipes the entire system. This is too drastic for table-level corruption.
Set the corrupted AMP offline, and restore the entire system: Restoring the entire system is unnecessary if only one table is corrupted.
Perform a SYSINIT, and restore the entire system: This would be an extreme and time-consuming option, only used if the entire system is corrupted.

NEW QUESTION # 54
An Administrator needs to provide end users access to data in a Native Object Store using shared credentials.
How can this be accomplished?

A. Grant users access to a shared AUTHORIZATION object.
B. Define a FOREIGN TABLE with DEFINER TRUSTED security.
C. Use an S3 1AM role or Azure SAS token rather than User and Password.
D. Define a FUNCTION MAPPING with INVOKER TRUSTED security.

Answer: A

Explanation:
In Teradata's Native Object Store, the AUTHORIZATION object stores shared credentials (such as an S3 IAM role, Azure SAS token, or other cloud storage credentials). By granting users access to this shared authorization object, the administrator can allow multiple users to access the object store using the same set of credentials. This simplifies credential management and ensures secure access to the external data source.
Option A (Define a FOREIGN TABLE with DEFINER TRUSTED security) refers to defining a foreign table with a specific security model but does not handle shared credentials directly.
Option B (Define a FUNCTION MAPPING with INVOKER TRUSTED security) relates to function mappings and security contexts for user-defined functions, not directly to shared credentials for accessing an object store.
Option C (Use an S3 IAM role or Azure SAS token rather than User and Password) is a part of how credentials might be managed, but it does not address the mechanism for sharing these credentials among users. The AUTHORIZATION object is the correct method for managing and sharing these credentials securely.

NEW QUESTION # 55
Given a user creation request on a 10-AMP system:
CREATE USER hr_user AS PERM = 100e9 SKEW = 10 PERCENT,
SPOOL = 100e9 SKEW = 20 PERCENT;
How does the SKEW factor affect the user's Perm space, assuming the total space consumed is under the specified perm space limit?

A. The per AMP limit of any AMP can reach 20 GB.
B. The per AMP limit of 100 GB can be breached up to 10 percent.
C. The per AMP limit of 10 GB can be breached to any percent.
D. The per AMP limit of any AMP can reach 11 GET

Answer: D

Explanation:
In the given CREATE USER statement, the SKEW = 10 PERCENT parameter applies to Perm space and allows some AMPs (Access Module Processors) to use up to 10% more space than the average allocation across the AMPs.
The user is allocated 100 GB of Perm space across a 10-AMP system, meaning the average space per AMP is 10 GB.
With a 10% skew allowed, this means that an AMP can use up to 10% more than the average allocation, which is 10 GB + 1 GB = 11 GB.

NEW QUESTION # 56
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