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Understanding functional and technical aspects of AWS Certified Database - Specialty Management and Operations
The following will be discussed in AMAZON DBS-C01 exam dumps:
- Manage the operational environment of a database solution
- Determine backup and restore strategies
- Determine maintenance tasks and processes
NEW QUESTION 15
A company is concerned about the cost of a large-scale, transactional application using Amazon DynamoDB that only needs to store data for 2 days before it is deleted. In looking at the tables, a Database Specialist notices that much of the data is months old, and goes back to when the application was first deployed.
What can the Database Specialist do to reduce the overall cost?
- A. Create a new attribute in each table to track the expiration time and enable DynamoDB Streams on each table.
- B. Create a new attribute in each table to track the expiration time and create an AWS Glue transformation to delete entries more than 2 days old.
- C. Create a new attribute in each table to track the expiration time and enable time to live (TTL) on each table.
- D. Create an Amazon CloudWatch Events event to export the data to Amazon S3 daily using AWS Data Pipeline and then truncate the Amazon DynamoDB table.
Answer: C
Explanation:
Explanation
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html
NEW QUESTION 16
A media company is using Amazon RDS for PostgreSQL to store user data. The RDS DB instance currently has a publicly accessible setting enabled and is hosted in a public subnet. Following a recent AWS Well- Architected Framework review, a Database Specialist was given new security requirements.
Only certain on-premises corporate network IPs should connect to the DB instance.
Connectivity is allowed from the corporate network only. Which combination of steps does the Database Specialist need to take to meet these new requirements?
(Choose three.)
- A. Modify the associated security group. Add the required corporate network IPs and remove the unwanted IPs.
- B. Modify the pg_hba.conf file. Add the required corporate network IPs and remove the unwanted IPs.
- C. Connect to the DB instance using private IPs and a VPN.
- D. Disable the publicly accessible setting.
- E. Move the DB instance to a private subnet using AWS DMS.
- F. Enable VPC peering between the application host running on the corporate network and the VPC associated with the DB instance.
Answer: C,D,F
NEW QUESTION 17
A company has an Amazon RDS Multi-AZ DB instances that is 200 GB in size with an RPO of 6 hours. To meet the company's disaster recovery policies, the database backup needs to be copied into another Region.
The company requires the solution to be cost-effective and operationally efficient.
What should a Database Specialist do to copy the database backup into a different Region?
- A. Use Amazon RDS automated snapshots and use AWS Lambda to copy the snapshot into another Region
- B. Use Amazon RDS automated snapshots every 6 hours and use Amazon S3 cross-Region replication to copy the snapshot into another Region
- C. Create an AWS Lambda function to take an Amazon RDS snapshot every 6 hours and use a second Lambda function to copy the snapshot into another Region
- D. Create a cross-Region read replica for Amazon RDS in another Region and take an automated snapshot of the read replica
Answer: C
Explanation:
Explanation
System snapshot can't fulfill 6 hours requirement. You need to control it by script
https://aws.amazon.com/blogs/database/%C2%AD%C2%AD%C2%ADautomating-cross-region-cross-account-s
NEW QUESTION 18
A company is using a Single-AZ Amazon RDS for MySQL DB instance for development. The DB instance is experiencing slow performance when queries are executed. Amazon CloudWatch metrics indicate that the instance requires more I/O capacity.
Which actions can a database specialist perform to resolve this issue? (Choose two.)
- A. Convert from General Purpose to Provisioned IOPS (PIOPS).
- B. Restart the application tool used to execute queries.
- C. Increase the I/O parameter in Amazon RDS Enhanced Monitoring.
- D. Convert from Single-AZ to Multi-AZ.
- E. Change to a database instance class with higher throughput.
Answer: A,E
Explanation:
Explanation
https://aws.amazon.com/blogs/database/best-storage-practices-for-running-production-workloads-on-hosted-data
"If you find the pattern of IOPS usage consistently going beyond more than 16,000, you should modify the DB instance and change the storage type from gp2 to io1.
NEW QUESTION 19
A Database Specialist modified an existing parameter group currently associated with a production Amazon RDS for SQL Server Multi-AZ DB instance. The change is associated with a static parameter type, which controls the number of user connections allowed on the most critical RDS SQL Server DB instance for the company. This change has been approved for a specific maintenance window to help minimize the impact on users.
How should the Database Specialist apply the parameter group change for the DB instance?
- A. Reboot the secondary Multi-AZ DB instance
- B. Apply the change manually by rebooting the DB instance during the approved maintenance window
- C. Allow the preconfigured RDS maintenance window for the given DB instance to control when the change is applied
- D. Select the option to apply the change immediately
Answer: B
Explanation:
Explanation
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithParamGroups.html#USER_W
NEW QUESTION 20
A marketing company is using Amazon DocumentDB and requires that database audit logs be enabled. A Database Specialist needs to configure monitoring so that all data definition language (DDL) statements performed are visible to the Administrator. The Database Specialist has set the audit_logs parameter to enabled in the cluster parameter group.
What should the Database Specialist do to automatically collect the database logs for the Administrator?
- A. Configure an AWS Lambda function to download the logs using the download-db-log-file-portion operationand store the logs in Amazon S3
- B. Enable DocumentDB Events to export the logs to Amazon CloudWatch Logs
- C. Enable DocumentDB to export the logs to Amazon CloudWatch Logs
- D. Enable DocumentDB to export the logs to AWS CloudTrail
Answer: C
NEW QUESTION 21
A company is planning to close for several days. A Database Specialist needs to stop all applications along with the DB instances to ensure employees do not have access to the systems during this time. All databases are running on Amazon RDS for MySQL.
The Database Specialist wrote and executed a script to stop all the DB instances. When reviewing the logs, the Database Specialist found that Amazon RDS DB instances with read replicas did not stop.
How should the Database Specialist edit the script to fix this issue?
- A. Stop the source instances before stopping their read replicas
- B. Use the AWS CLI to stop each read replica and source instance at the same time
- C. Stop the read replicas before stopping their source instances
- D. Delete each read replica before stopping its corresponding source instance
Answer: B
NEW QUESTION 22
Developers have requested a new Amazon Redshift cluster so they can load new third-party marketing data.
The new cluster is ready and the user credentials are given to the developers. The developers indicate that their copy jobs fail with the following error message:
"Amazon Invalid operation: S3ServiceException:Access Denied,Status 403,Error AccessDenied." The developers need to load this data soon, so a database specialist must act quickly to solve this issue.
What is the MOST secure solution?
- A. Create a new IAM role with read-only access to the Amazon S3 bucket with the assume role action. Add this role to the developer IAM user ID used for the copy job that ended with an error message.
- B. Create a new IAM role with read-only access to the Amazon S3 bucket and include the assume role action. Modify the Amazon Redshift cluster to add the IAM role.
- C. Create a new IAM role with the same user name as the Amazon Redshift developer user ID. Provide the IAM role with read-only access to Amazon S3 with the assume role action.
- D. Create a new IAM user with access keys and a new role with read-only access to the Amazon S3 bucket.Add this role to the Amazon Redshift cluster. Change the copy job to use the access keys created.
Answer: B
Explanation:
Explanation
https://docs.aws.amazon.com/redshift/latest/gsg/rs-gsg-create-an-iam-role.html
"Now that you have created the new role, your next step is to attach it to your cluster. You can attach the role when you launch a new cluster or you can attach it to an existing cluster. In the next step, you attach the role to a new cluster."
https://docs.aws.amazon.com/redshift/latest/dg/copy-usage_notes-access-permissions.html
NEW QUESTION 23
A retail company with its main office in New York and another office in Tokyo plans to build a database solution on AWS. The company's main workload consists of a mission-critical application that updates its application data in a data store. The team at the Tokyo office is building dashboards with complex analytical queries using the application data. The dashboards will be used to make buying decisions, so they need to have access to the application data in less than 1 second.
Which solution meets these requirements?
- A. Use an Amazon RDS DB instance deployed in the us-east-1 Region with a read replica instance in the apnortheast-1 Region. Create an Amazon ElastiCache cluster in the ap-northeast-1 Region to cacheapplication data from the replica to generate the dashboards.
- B. Use an Amazon DynamoDB global table in the us-east-1 Region with replication into the ap-northeast-1Region. Use Amazon QuickSight for displaying dashboard results.
- C. Use an Amazon RDS for MySQL DB instance deployed in the us-east-1 Region with a read replicainstance in the ap-northeast-1 Region. Have the dashboard application read from the read replica.
- D. Use an Amazon Aurora global database. Deploy the writer instance in the us-east-1 Region and the replicain the ap-northeast-1 Region. Have the dashboard application read from the replica ap-northeast-1 Region.
Answer: D
NEW QUESTION 24
A Database Specialist migrated an existing production MySQL database from on-premises to an Amazon RDS for MySQL DB instance. However, after the migration, the database needed to be encrypted at rest using AWS KMS. Due to the size of the database, reloading, the data into an encrypted database would be too time-consuming, so it is not an option.
How should the Database Specialist satisfy this new requirement?
- A. Create a snapshot of the unencrypted RDS DB instance. Create an encrypted copy of the unencryptedsnapshot. Restore the encrypted snapshot copy.
- B. Restore an unencrypted snapshot into a MySQL RDS DB instance that is encrypted.
- C. Create an encrypted read replica of the RDS DB instance. Promote it the master.
- D. Modify the RDS DB instance. Enable the AWS KMS encryption option that leverages the AWS CLI.
Answer: A
NEW QUESTION 25
A Database Specialist is migrating an on-premises Microsoft SQL Server application database to Amazon RDS for PostgreSQL using AWS DMS. The application requires minimal downtime when the RDS DB instance goes live.
What change should the Database Specialist make to enable the migration?
- A. Configure the AWS DMS task to generate full logs to allow for ongoing change data capture (CDC)
- B. Configure the AWS DMS replication instance to allow both full load and ongoing change data capture (CDC)
- C. Configure the on-premises application database to act as a source for an AWS DMS full load with ongoing change data capture (CDC)
- D. Configure the AWS DMS connections to allow two-way communication to allow for ongoing change data capture (CDC)
Answer: C
Explanation:
Explanation
"requires minimal downtime when the RDS DB instance goes live" in order to do CDC: "you must first ensure that ARCHIVELOG MODE is on to provide information to LogMiner. AWS DMS uses LogMiner to read information from the archive logs so that AWS DMS can capture changes"
https://docs.aws.amazon.com/dms/latest/sbs/chap-oracle2postgresql.steps.configureoracle.html
"If you want to capture and apply changes (CDC), then you also need the following privileges."
NEW QUESTION 26
A Database Specialist needs to speed up any failover that might occur on an Amazon Aurora PostgreSQL DB cluster. The Aurora DB cluster currently includes the primary instance and three Aurora Replicas.
How can the Database Specialist ensure that failovers occur with the least amount of downtime for the application?
- A. Call the AWS CLI failover-db-cluster command
- B. Enable Enhanced Monitoring on the DB cluster
- C. Set the TCP keepalive parameters low
- D. Start a database activity stream on the DB cluster
Answer: A
NEW QUESTION 27
To meet new data compliance requirements, a company needs to keep critical data durably stored and readily accessible for 7 years. Data that is more than 1 year old is considered archival data and must automatically be moved out of the Amazon Aurora MySQL DB cluster every week. On average, around 10 GB of new data is added to the database every month. A database specialist must choose the most operationally efficient solution to migrate the archival data to Amazon S3.
Which solution meets these requirements?
- A. Create a custom script that exports archival data from the DB cluster to Amazon S3 using a SQL view, then deletes the archival data from the DB cluster. Launch an Amazon EC2 instance with a weekly cron job to execute the custom script.
- B. Use AWS Database Migration Service (AWS DMS) to continually export the archival data from the DB cluster to Amazon S3. Configure an AWS Data Pipeline process to run weekly that executes a custom SQL script to delete the archival data from the DB cluster.
- C. Configure two AWS Lambda functions: one that exports archival data from the DB cluster to Amazon S3 using the mysqldump utility, and another that deletes the archival data from the DB cluster. Schedule both Lambda functions to run weekly using Amazon EventBridge (Amazon CloudWatch Events).
- D. Configure an AWS Lambda function that exports archival data from the DB cluster to Amazon S3 using a SELECT INTO OUTFILE S3 statement, then deletes the archival data from the DB cluster. Schedule the Lambda function to run weekly using Amazon EventBridge (Amazon CloudWatch Events).
Answer: C
NEW QUESTION 28
A ride-hailing application stores bookings in a persistent Amazon RDS for MySQL DB instance. This program is very popular, and the corporation anticipates a tenfold rise in the application's user base over the next several months. The application receives a higher volume of traffic in the morning and evening.
This application is divided into two sections:
An internal booking component that takes online reservations in response to concurrent user queries.
A component of a third-party customer relationship management (CRM) system that customer service professionals utilize. Booking data is accessed using queries in the CRM.
To manage this workload effectively, a database professional must create a cost-effective database system.
Which solution satisfies these criteria?
- A. Use Amazon ElastiCache for Redis to accept the bookings. Associate an AWS Lambda function to capture changes and push the booking data to an Amazon Redshift database used by the CRM.
- B. Use Amazon ElastiCache for Redis to accept the bookings. Associate an AWS Lambda function to capture changes and push the booking data to the RDS for MySQL DB instance used by the CRM.
- C. Use Amazon DynamoDB to accept the bookings. Enable DynamoDB Streams and associate an AWS Lambda function to capture changes and push the booking data to Amazon Athena, which is used by the CRM.
- D. Use Amazon DynamoDB to accept the bookings. Enable DynamoDB Streams and associate an AWS Lambda function to capture changes and push the booking data to an Amazon SQS queue. This triggers another Lambda function that pulls data from Amazon SQS and writes it to the RDS for MySQL DB instance used by the CRM.
Answer: D
Explanation:
Explanation
"AWS Lambda function to capture changes" capture changes to what? ElastiCache? The main use of ElastiCache is to cache frequently read data. Also "the company expects a tenfold increase in the user base" and "correspond to simultaneous requests from users"
NEW QUESTION 29
For the first time, a database professional is establishing a test graph database on Amazon Neptune. The database expert must input millions of rows of test observations from an Amazon S3.csv file. The database professional uploaded the data to the Neptune DB instance through a series of API calls.
Which sequence of actions enables the database professional to upload the data most quickly? (Select three.)
- A. Use AWS DMS to move data from Amazon S3 to the Neptune Loader.
- B. Create an S3 VPC endpoint and issue an HTTP POST to the database's loader endpoint.
- C. Ensure an IAM role for the Neptune DB instance is configured with the appropriate permissions to allow access to the file in the S3 bucket.
- D. Ensure the vertices and edges are specified in different .csv files with proper header column formatting.
- E. Curl the S3 URI while inside the Neptune DB instance and then run the addVertex or addEdge commands.
- F. Ensure Amazon Cognito returns the proper AWS STS tokens to authenticate the Neptune DB instance to the S3 bucket hosting the CSV file.
Answer: B,C,D
Explanation:
Explanation
https://docs.aws.amazon.com/neptune/latest/userguide/bulk-load-optimize.html
NEW QUESTION 30
A corporation wishes to move a 1 TB Oracle database from its current location to an Amazon Aurora PostgreSQL DB cluster. The database specialist at the firm noticed that the Oracle database stores 100 GB of large binary objects (LOBs) across many tables. The Oracle database supports LOBs up to 500 MB in size and an average of 350 MB. AWS DMS was picked by the Database Specialist to transfer the data with the most replication instances.
How should the database specialist improve the transfer of the database to AWS DMS?
- A. Create a single task using limited LOB mode with a maximum LOB size of 500 MB to migrate data and LOBs together
- B. Create two tasks: task1 with LOB tables using full LOB mode with a LOB chunk size of 500 MB and task2 without LOBs
- C. Create a single task using full LOB mode with a LOB chunk size of 500 MB to migrate the data and LOBs together
- D. Create two tasks: task1 with LOB tables using limited LOB mode with a maximum LOB size of 500 MB and task 2 without LOBs
Answer: D
Explanation:
Explanation
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_BestPractices.html#CHAP_BestPractices.LOBS,
"AWS DMS migrates LOB data in two phases: 1. AWS DMS creates a new row in the target table and populates the row with all data except the associated LOB value. 2.AWS DMS updates the row in the target table with the LOB data." This means that we would need two tasks, one per phase and use limited LOB mode for best performance.
NEW QUESTION 31
An Amazon RDS EBS-optimized instance with Provisioned IOPS (PIOPS) storage is using less than half of its allocated IOPS over the course of several hours under constant load. The RDS instance exhibits multi-second read and write latency, and uses all of its maximum bandwidth for read throughput, yet the instance uses less than half of its CPU and RAM resources.
What should a Database Specialist do in this situation to increase performance and return latency to sub-second levels?
- A. Change the underlying EBS storage type to General Purpose SSD (gp2)
- B. Increase the size of the DB instance storage
- C. Change the DB instance to an instance class with a higher maximum bandwidth
- D. Disable EBS optimization on the DB instance
Answer: A
NEW QUESTION 32
A company is releasing a new mobile game featuring a team play mode. As a group of mobile device users play together, an item containing their statuses is updated in an Amazon DynamoDB table. Periodically, the other users' devices read the latest statuses of their teammates from the table using the BatchGetltemn operation.
Prior to launch, some testers submitted bug reports claiming that the status data they were seeing in the game was not up-to-date. The developers are unable to replicate this issue and have asked a database specialist for a recommendation.
Which recommendation would resolve this issue?
- A. Ensure the BatchGetltem operation is called with the ConsistentRead parameter set to false.
- B. Enable a stream on the DynamoDB table and subscribe each device to the stream to ensure all devices receive up-to-date status information.
- C. Ensure the DynamoDB table is configured to be always consistent.
- D. Ensure the BatchGetltem operation is called with the ConsistentRead parameter set to true.
Answer: D
Explanation:
Explanation
https://docs.aws.amazon.com/ja_jp/amazondynamodb/latest/developerguide/API_BatchGetItem_v20111205.htm By default, BatchGetItem performs eventually consistent reads on every table in the request. If you want strongly consistent reads instead, you can set ConsistentRead to true for any or all tables.
NEW QUESTION 33
An online gaming company is planning to launch a new game with Amazon DynamoDB as its data store. The database should be designated to support the following use cases:
* Update scores in real time whenever a player is playing the game.
* Retrieve a player's score details for a specific game session.
A Database Specialist decides to implement a DynamoDB table. Each player has a unique user_id and each game has a unique game_id.
Which choice of keys is recommended for the DynamoDB table?
- A. Create a global secondary index with game_id as the partition key
- B. Create a composite primary key with game_id as the partition key and user_id as the sort key
- C. Create a global secondary index with user_id as the partition key
- D. Create a composite primary key with user_id as the partition key and game_id as the sort key
Answer: C
NEW QUESTION 34
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Below are the requirements of AWS Certified Database Specialty Exam
There is no prerequisites for AWS Certified Database - Specialty exam.
True AWS-Certified-Database-Specialty Exam Extraordinary Practice For the Exam: https://learningtree.testkingfree.com/Amazon/AWS-Certified-Database-Specialty-practice-exam-dumps.html