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Elastic Block Storage is limited in size and won’t auto scale with your storage needs.
- False
- True (Ans)
Compared to a relational database’s data model…
- A DynamoDB attribute is like a row, and item is like a column
- None of these
- A DynamoDB key is like a column, and item is like a row
- A DynamoDB attribute is like a column, and item is like a row (Ans)
A local secondary index can be created at any time, unlike a global secondary index.
- True
- False (Ans)
You cannot use an Amazon-provided license for an Oracle Enterprise Edition.
- False
- True (Ans)
What is an example of a native capability of DynamoDB?
- All of these (Ans)
- SSD storage
- Multiple data consistency options
- Built-in data replication
What question does NOT factor into your decisions when creating a new RDS instance?
- Number of manual snapshots you will take (Ans)
- Region to create the database in
- How much storage you need
- Which database engine to use
Redshift customers have to pay data transfer costs when loading the warehouse.
- False (Ans)
- True
Why should a read replica use the same (or better) instance class as the source database?
- None of these
- Because instance size is immutable and can’t be changed later
- To avoid falling behind on synchronization (Ans)
- Because RDS requires it when configuring a read replica
Why should you use multiple files in S3 to import data?
- So Redshift can allocate the biggest files to the largest nodes
- Get better throughput by putting all the node slices to work (Ans)
- All of these
- The cost of importing data goes down
Why would you add a read replica to an RDS database?
- Have an alternate database to insert records
- Scale performance of a high traffic database (Ans)
- Establish an automatic failover database in case of AZ outage
Which of the following are native Redshift capabilities?
- Up to petabytes of storage
- Encryption at rest
- Parallel query processing
- All of these (Ans)
Both query and scan requests support parallel execution via segments.
- False (Ans)
- True
What is the name of the setting that controls placement of data among the nodes?
- Sort key
- Primary key
- Data distribution key (Ans)
- Index key
What happens when you ask for an attribute that wasn’t projected into a local secondary index?
- DynamoDB throws an exception
- The data is retrieved from the source table (Ans)
- Empty data is returned
- DynamoDB copies the data into the index and then returns it
Which of the following are supported RDS database engines?
- MySQL
- All of these (Ans)
- Microsoft SQL Server
- Oracle
Which command lets you validate data without actually importing it?
- VALIDATE
- SKIP
- STAGE
- NOLOAD (Ans)
Read replicas cannot be promoted to standalone RDS database instances.
- True
- False (Ans)
Which of the following databases is based on PostgreSQL?
- Amazon DynamoDB
- Amazon RDS
- All of these
- Amazon Redshift (Ans)
Throughput units are set during table creation time and cannot be changed.
- True
- False (Ans)
How does DynamoDB decide on the number of partitions to create for your table?
- Based on the “partition count” parameter set during table creation
- Based on throughput units chosen
- Based on data storage
- Based on data storage or throughput units chosen (Ans)
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