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NEW QUESTION: 1
You need to recommend a load balancing solution for the client connections that must be created to meet the disaster recovery requirements.
What should you recommend?
A. Deploy a Layer 7 load balancing solution.
B. Implement DNS load balancing for all the Exchange-related DNS records and implement round robin for DNS name resolution.
C. Deploy a Layer 4 load balancing solution.
D. Implement Network Load Balancing (NLB) on each Exchange server.
Answer: A
Explanation:
References:
https://docs.microsoft.com/en-us/exchange/architecture/client-access/load-balancing?view=exchserver-2019
NEW QUESTION: 2
Overview
General Overview
ADatum Corporation has offices in Miami and Montreal.
The network contains a single Active Directory forest named adatum.com. The offices connect to each other by using a WAN link that has 5-ms latency. A Datum standardizes its database platform by using SQL Server 2014 Enterprise edition.
Databases
Each office contains databases named Sales, Inventory, Customers, Products, Personnel, and Dev.
Servers and databases are managed by a team of database administrators. Currently, all of the database administrators have the same level of permissions on all of the servers and all of the databases.
The Customers database contains two tables named Customers and Classifications.
The following graphic shows the relevant portions of the tables:
The following table shows the current data in the Classifications table:
The Inventory database is updated frequently.
The database is often used for reporting.
A full backup of the database currently takes three hours to complete.
Stored Procedures
A stored procedure named USP_1 generates millions of rows of data for multiple reports. USP_1 combines data from five different tables from the Sales and Customers databases in a table named Table1.
After Table1 is created, the reporting process reads data from Table1 sequentially several times. After the process is complete, Table1 is deleted.
A stored procedure named USP_2 is used to generate a product list. The product list contains the names of products grouped by category.
USP_2 takes several minutes to run due to locks on the tables the procedure accesses. The locks are caused by USP_1 and USP_3.
A stored procedure named USP_3 is used to update prices. USP_3 is composed of several UPDATE statements called in sequence from within a transaction.
Currently, if one of the UPDATE statements fails, the stored procedure fails. A stored procedure named USP_4 calls stored procedures in the Sales, Customers, and Inventory databases.
The nested stored procedures read tables from the Sales, Customers, and Inventory databases. USP_4 uses an EXECUTE AS clause.
All nested stored procedures handle errors by using structured exception handling. A stored procedure named USP_5 calls several stored procedures in the same database. Security checks are performed each time USP_5 calls a stored procedure.
You suspect that the security checks are slowing down the performance of USP_5. All stored procedures accessed by user applications call nested stored procedures.
The nested stored procedures are never called directly.
Design Requirements
Data Recovery
You must be able to recover data from the Inventory database if a storage failure occurs. You have a Recovery Time Objective (RTO) of 5 minutes.
You must be able to recover data from the Dev database if data is lost accidentally. You have a Recovery Point Objective (RPO) of one day.
Classification Changes
You plan to change the way customers are classified. The new classifications will have four levels based on the number of orders. Classifications may be removed or added in the future. Management requests that historical data be maintained for the previous classifications. Security A group of junior database administrators must be able to manage security for the Sales database. The junior database administrators will not have any other administrative rights. A Datum wants to track which users run each stored procedure.
Storage
ADatum has limited storage. Whenever possible, all storage space should be minimized for all databases and all backups.
Error Handling
There is currently no error handling code in any stored procedure.
You plan to log errors in called stored procedures and nested stored procedures. Nested stored procedures are never called directly.
You need to recommend a solution for the planned changes to the customer classifications. What should you recommend? (Each correct answer presents part of the solution. Choose all that apply.)
A. Add a column to the Classifications table to track the status of each classification.
B. Add columns for each classification to the Customers table.
C. Add a row to the Customers table each time a classification changes.
D. Implement change data capture.
E. Add a table to track any changes made to the classification of each customer.
Answer: A,E
Explanation:
Explanation/Reference:
Explanation:
Scenario:
You plan to change the way customers are classified.
The new classifications will have four levels based on the number of orders. Classifications may be removed or added in the future.
Incorrect Answers:
E: Change data capture provides information about DML changes on a table and a database. By using change data capture, you eliminate expensive techniques such as user triggers, timestamp columns, and join queries.
NEW QUESTION: 3
개발자는 시간당 수백 번 실행될 것으로 예상되는 RDS 데이터베이스에 새로운 고객을 추가해야 하는 Lambda 기능을 구현했습니다. Lambda 함수는 512MB의 RAM을 사용하도록 구성되며 다음 의사 코드를 기반으로 합니다.
Lambda 함수를 테스트 한 후 개발자는 Lambda 실행 시간이 예상보다 훨씬 길다는 것을 알게됩니다. 성능 향상을 위해 개발자는 어떻게 해야 합니까?
A. RDS wit Amazon DynamoDB를 교체하여 초당 쓰기 수를 제어합니다.
B. Lambda 함수에 할당 된 RAM의 양을 늘리면 Lambda가 사용할 수있는 스레드 수가 증가합니다.
C. 데이터베이스 연결을 닫고 명령문을 핸들러에서 닫으십시오. 글로벌 공간에 연결하십시오.
D. RDS 데이터베이스의 크기를 늘려서 매시간 데이터베이스 연결 수가 증가하십시오.
Answer: C
Explanation:
Explanation
Refer AWS documentation - Lambda Best Practices
Take advantage of Execution Context reuse to improve the performance of your function. Make sure any externalized configuration or dependencies that your code retrieves are stored and referenced locally after initial execution. Limit the re-initialization of variables/objects on every invocation. Instead use static initialization/constructor, global/static variables and singletons. Keep alive and reuse connections (HTTP, database, etc.) that were established during a previous invocation.