NoSQL DB Exam Topics With Complete Solutions
What are the 4 NoSQL Data models - ANSWER Key-value, graph database,
document-oriented, and column family
What is the CAP Theorem - ANSWER CAP stands for Consistency, Availability, Partition
Tolerance. CAP theorem states only 2 of these 3 concepts can be achieved
simultaneously, not all 3.
Big Data can be understood through the 3 V's, what are they - ANSWER Volume, variety,
velocity
What are 5 ways NoSQL differs from RDB - ANSWER 1. looser schema definition
2. Applications written to deal with specific documents, objects or data from the DB
3. Designed to handle distributed, large DBs
4. No strong support for ad hoc queries but designed for speed and growth of DB(query
language through APIs)
5. Relaxation of the ACID properties
What does sharding do - ANSWER distributes a single logical data collection across a
cluster of machines, the data is partitioned horizontally
What is a Shard - ANSWER The collection of data objects on a specific DB server
Hot spots can be addressed by - ANSWER sharding
What can redundancy do for replica sets - ANSWER create multiple paths to the same
object
What are the 4 NoSQL Data models - ANSWER Key-value, graph database,
document-oriented, and column family
What is the CAP Theorem - ANSWER CAP stands for Consistency, Availability, Partition
Tolerance. CAP theorem states only 2 of these 3 concepts can be achieved
simultaneously, not all 3.
Big Data can be understood through the 3 V's, what are they - ANSWER Volume, variety,
velocity
What are 5 ways NoSQL differs from RDB - ANSWER 1. looser schema definition
2. Applications written to deal with specific documents, objects or data from the DB
3. Designed to handle distributed, large DBs
4. No strong support for ad hoc queries but designed for speed and growth of DB(query
language through APIs)
5. Relaxation of the ACID properties
What does sharding do - ANSWER distributes a single logical data collection across a
cluster of machines, the data is partitioned horizontally
What is a Shard - ANSWER The collection of data objects on a specific DB server
Hot spots can be addressed by - ANSWER sharding
What can redundancy do for replica sets - ANSWER create multiple paths to the same
object
