Scaling Data Storage

Question 1

Define database partitioning.

Answer 1

The process of dividing a database into smaller, more manageable pieces called partitions.

Question 2

What is hashing in databases?

Answer 2

A technique to convert data into a fixed-size string of characters, which is typically a hash code.

Question 3

True or false: Consistent hashing allows for dynamic addition of nodes without rehashing all data.

Answer 3

TRUE

Consistent hashing minimizes data movement when nodes are added or removed.

Question 4

Fill in the blank: Replication involves _______ data across multiple servers.

Answer 4

copying

Question 5

What is the main goal of database replication?

Answer 5

To ensure data availability and reliability by duplicating data across multiple locations.

Question 6

Define sharding.

Answer 6

A type of database partitioning that separates data into smaller, more manageable pieces called shards.

Question 7

What is the purpose of a hash function?

Answer 7

To map data of arbitrary size to fixed-size values, ensuring uniform distribution.

Question 8

True or false: Replication can improve read performance.

Answer 8

TRUE

Multiple replicas can handle read requests simultaneously.

Question 9

Fill in the blank: Consistent hashing uses a _______ to distribute keys across nodes.

Answer 9

ring structure

Question 10

What is a partition key?

Answer 10

A specific attribute used to determine how data is distributed across partitions.