RELIABLE TDVAN5 EXAM PDF | RELIABLE TDVAN5 SOURCE

Reliable TDVAN5 Exam Pdf | Reliable TDVAN5 Source

Reliable TDVAN5 Exam Pdf | Reliable TDVAN5 Source

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TeraData HCIA-Datacom V1.0 Sample Questions (Q24-Q29):

NEW QUESTION # 24
A client has a healthy system but often sees delays in some queries because of workload concurrency limits. These limits have been carefully chosen, so the client needs a solution that will not modify them.
What should the Administrator use to assist this client?

  • A. Use a system throttle.
  • B. Use Flex Throttle option.
  • C. Use Query Group Viewpoint gortjet to change the throttle limit temporally.

Answer: B

Explanation:
Use Query Monitor Viewpoint portlet to change query workloads.
Explanation:
The Flex Throttle option allows the system to temporarily adjust workload concurrency limits based on system conditions. This provides more flexibility when handling spikes in query concurrency, without permanently modifying the established workload limits. Flex Throttle is ideal for handling temporary peaks in activity, helping to smooth out delays while keeping the core concurrency limits intact.
Option A (Use a system throttle) would enforce strict concurrency limits but doesn't provide the flexibility needed in this scenario, where the client is trying to avoid modifying existing limits.
Option B (Use Query Group Viewpoint portlet to change the throttle limit temporarily) suggests manually adjusting the throttle limit, which is not desirable in this case as the limits have been carefully chosen.
Option D (Use Query Monitor Viewpoint portlet to change query workloads) would involve changing the way queries are handled or prioritized but does not address the need to keep concurrency limits unchanged while still dealing with temporary delays.
Thus, Flex Throttle (Option C) provides the best solution to assist the client without altering the concurrency limits permanently.


NEW QUESTION # 25
An Administrator has been presented with these performance metrics from the DBQLOGTBL table for four queries:

The Administrator needs to identify which query is suspected to be causing a full table scan or large redistribution.
Which query is producing this result?

  • A. QRY_A because of PJI
  • B. QRY_C because of UII
  • C. QRY_D because of CPU SKEW
  • D. QRY_B because of IO SKEW

Answer: D

Explanation:
IO SKEW refers to an uneven distribution of I/O operations across AMPs, which can occur during large redistributions or full table scans, as data needs to be read from or written to the entire table. High IO skew indicates that some AMPs are handling significantly more I/O than others, which is often a sign of inefficient data distribution or full table scanning.
QRY_B has an IO SKEW value of 2.76, which is much higher than the other queries, suggesting that it is likely performing a full table scan or large redistribution, as this would result in uneven I/O across AMPs.
CPU SKEW (as seen in QRY_D) could indicate an issue with CPU load balancing, but it doesn't necessarily suggest a full table scan or redistribution.
UII (Utility Impact Index) and PJI (Product Join Index) are also metrics that might indicate query inefficiencies, but the high IO SKEW in QRY_B is the most direct indicator of a full table scan or large redistribution.
QRY_B is the query suspected of causing the full table scan or large redistribution due to its high IO SKEW value.


NEW QUESTION # 26
An Administrator has set up security constraints on columns holding sensitive data through the use of profiles. A user, with an appropriate profile, then issues a select against this sensitive data.
Which type of privilege is being used?

  • A. Ownership
  • B. Inherited
  • C. Assigned
  • D. Automatic

Answer: B

Explanation:
Inherited privileges are those that a user acquires based on their membership in a profile or role. In this case, the user has been assigned a profile that grants access to sensitive data, meaning the privilege to access that data is inherited through the profile.
Option B (Ownership) refers to the privileges that the creator (owner) of a database object has over that object, but in this case, the user is accessing data through a profile, not ownership.
Option C (Automatic) would suggest that the privilege is granted automatically without the need for an explicit assignment or inheritance, which doesn't apply here because the privileges are coming from a profile.
Option D (Assigned) refers to direct privileges granted to a user individually, but in this scenario, the user is accessing data through a profile, which means the privileges are inherited rather than directly assigned.


NEW QUESTION # 27
A client is having many problems with a poorly written SQL. They have product joins running against large tables, and this is causing severe performance issues. The Administrator needs to help the client avoid the harm to the system that is being caused by running these queries.
Which action should be taken by the Administrator to assist this client?

  • A. Use the Query Spotlight Viewpoint portlet to deprioritize the queries.
  • B. Use a TASM system filter.
  • C. Use the Query Log Viewpoint portlet to identity and abort the harmful queries.
  • D. Use the Flex Throttle option.

Answer: B

Explanation:
Teradata Active System Management (TASM) allows the system administrator to control and manage query workload in real-time. A TASM system filter can be used to prevent or deprioritize certain types of queries, such as product joins or poorly written queries, that are consuming excessive resources. This approach ensures that problematic queries do not harm the overall system performance.
Query Spotlight Viewpoint portlet focuses on identifying and managing individual queries but does not provide the same level of proactive filtering and control as TASM system filters.
Flex Throttle is useful for controlling the concurrency of queries, but it doesn't specifically address preventing or managing product joins in a way that would directly resolve the issue with poorly written SQL.
Query Log Viewpoint portlet would help in identifying and aborting harmful queries, but it's a reactive approach rather than a proactive solution like using TASM system filters.


NEW QUESTION # 28
The Administrator is receiving complaints that a business application is taking a very long time to refresh the screen. After analyzing the WD-Report workload, the Administrator notices that several short select statements, with estimated processing time of less than 0.5 seconds, are waiting in the delay queue. The workload WD-Report is placed in Time Share Medium and managed by TIWM.
How should the Administrator solve this performance issue?

  • A. Create a throttle to reduce flow control.
  • B. Define a new state for SELECT statements based on estimated processing time and active the time share decay.
  • C. Place the WD-Report workload in the Service Level Goal (SLG) tier with 50% relative weight.
  • D. Create a new workload for SELECT statements based on the estimated processing time, and place in the Time Share TOP.

Answer: D

Explanation:
The select statements in the WD-Report workload are being delayed even though their processing times are short (less than 0.5 seconds), which is leading to slow screen refreshes.
By creating a new workload specifically for these short-running SELECT statements, the administrator can ensure that they are processed more quickly, without being delayed by other workloads.
Placing this new workload in Time Share TOP will give it a higher priority, ensuring these short queries are executed promptly, improving the responsiveness of the business application.
Other options are less effective because they either don't directly target the issue of short query delays (B), or may not appropriately prioritize these queries (A, C).


NEW QUESTION # 29
......

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