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Snowflake ADA-C02 Exam Syllabus Topics:

Section	Objectives
Data Protection and Recovery	- Backup and recovery mechanisms 1. Time Travel and Fail-safe concepts 2. Cloning and data recovery strategies
Performance and Monitoring	- Performance tuning and optimization 1. Query performance analysis 2. Warehouse sizing and scaling strategies
Security and Access Control	- Authentication and authorization 1. Network policies and secure access 2. Role-based access control (RBAC)
Data Loading and Unloading	- Bulk and continuous data ingestion 1. Stages and file formats 2. COPY INTO operations
Account and Resource Administration	- Account configuration and management 1. Resource monitors and governance basics 2. Users, roles, and permissions
Snowflake Architecture and Virtual Warehouses	- Snowflake architecture concepts 1. Virtual warehouse usage and scaling 2. Separation of storage and compute

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Snowflake SnowPro Advanced Administrator ADA-C02 Sample Questions (Q17-Q22):

NEW QUESTION # 17
What is a characteristic of Snowflake's transaction locking and concurrency modeling?

A. Queries executed within a given transaction see that transaction's uncommitted changes.
B. A deadlock cannot occur in Snowflake, since concurrently executed queries and DML statements do not block one another.
C. Transaction locking in Snowflake is enforced exclusively at the row and table levels.
D. If two queries are concurrently executed against the same table, one of the two queries will be blocked until the other query completes.

Answer: B

Explanation:
Snowflake uses multi-version concurrency control (MVCC), which allows queries and DML statements to operate without blocking each other. This architecture eliminates the possibility of deadlocks because transactions work on snapshots of data rather than locking rows or tables in ways that could cause contention.

NEW QUESTION # 18
MY_TABLE is a table that has not been updated or modified for several days. On 01 January 2021 at 07:01, a user executed a query to update this table. The query ID is '8e5d0ca9-005e-44e6-b858-a8f5b37c5726'. It is now 07:30 on the same day.
Which queries will allow the user to view the historical data that was in the table before this query was executed? (Choose three.)

A. SELECT * FROM TIME_TRAVEL('MY_TABLE', 2021-01-01 07:00:00);
B. SELECT * FROM my_table BEFORE(STATEMENT => '8e5d0ca9-005e-44e6-b858-a8f5b37c5726');
C. SELECT * FROM my_table PRIOR TO STATEMENT '8e5d0ca9-005e-44e6-b858-a8f5b37c5726';
D. SELECT * FROM my_table AT(OFFSET => -60*30);
E. SELECT * FROM my_table AT(TIMESTAMP => '2021-01-01 07:00:00'::timestamp);
F. SELECT * FROM my_table WITH TIME TRAVEL(OFFSET => -60*30);

Answer: B,D,E

Explanation:
Use Time Travel to view past table versions: (B) selects the table "as of" 07:00 via AT(TIMESTAMP => ...); (E) selects "as of" 30 minutes earlier via AT(OFFSET => -60*30); (F) selects the state before the specified statement via BEFORE(STATEMENT => '<query_id>').

NEW QUESTION # 19
Which tasks can be performed by the ORGADMIN role? (Choose three.)

A. Create a reader account to share data with another organization.
B. Create one or more accounts in the organization.
C. View usage information for all accounts in the organization.
D. View a list of all regions enabled for the organization.
E. Create secure views on application tables within the organization.
F. Perform zero-copy cloning on account data.

Answer: B,C,D

Explanation:
The ORGADMIN role can create accounts in the organization, view all enabled regions, and access usage information across all organization accounts. Creating secure views and zero-copy cloning are not ORGADMIN tasks. Reader accounts can be created, but only for sharing within the same organization, not with another organization.

NEW QUESTION # 20
When does auto-suspend occur for a multi-cluster virtual warehouse?

A. After a specified period of time when an additional cluster has started on the maximum number of clusters specified for a warehouse.
B. Auto-suspend does not apply for multi-cluster warehouses.
C. When there has been no activity on any cluster for the specified period of time.
D. When the minimum number of clusters is running and there is no activity for the specified period of time.

Answer: D

Explanation:
For a multi-cluster virtual warehouse, auto-suspend only triggers when the minimum number of clusters is running and there has been no activity for the specified period. Additional clusters above the minimum scale back down automatically, but suspension of the entire warehouse occurs only when the base minimum is idle.

NEW QUESTION # 21
A Snowflake Administrator has a multi-cluster virtual warehouse and is using the Snowflake Business-Critical edition. The minimum number of clusters is set to 2 and the maximum number of clusters is set to 10. This configuration works well for the standard workload, rarely exceeding 5 running clusters. However, once a month the Administrator notes that there are a few complex long-running queries that are causing increased queue time and the warehouse reaches its maximum limit at 10 clusters.
Which solutions will address the issues happening once a month? (Choose two.)

A. Use a task to increase the cluster size for the time period that the more complex queries are running and another task to reduce the size of the cluster once the complex queries complete.
B. Increase the multi-cluster maximum to 20 or more clusters.
C. Examine the complex queries and determine if they can be made more efficient using clustering keys or materialized views.
D. Have the group running the complex monthly queries use a separate appropriately-sized warehouse to support their workload.
E. Increase the minimum number of clusters started in the multi-cluster configuration to 5.

Answer: C,D

Explanation:
The best way to handle the once-a-month complex workload is to use a separate, appropriately-sized warehouse dedicated to that workload and to optimize the complex queries with techniques like clustering keys or materialized views. These approaches resolve queueing and performance issues without overspending on always running more clusters.

NEW QUESTION # 22
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