MongoDB Technology

Question 1

In a 3 member replica set, there are ____ primary members and ____ secondary members.

Answer 1

1, 2

Question 2

In a replica set, we are able to both read and write to a _____.

Answer 2

primary member

Question 3

MongoDB addresses high availability through the use of what?

Answer 3

replication

Question 4

MongoDB’s primary way of accommodating growing data volumes is called:

Answer 4

sharding

Question 5

In a highly available MongoDB environment, we are able to both read and write to a ____.

Answer 5

primary node

Question 6

Which of the following are sharding methods? [select any that apply]

• Range
• Hash
• Zoned
• Color

Answer 6

• Range
• Hash
• Zoned
  x Color

Question 7

This is a great way to provide high availability of client data.

• Config Node
• Replication
• Sharding
• Backups

Answer 7

x Config Node
- Replication
x Sharding
x Backups

Question 8

True or False? Data Validity/Schema Validation can be selectively enforced as needed in MongoDB.

Answer 8

True

Question 9

When a “write” occurs to the database, it’s first saved to the following:

Answer 9

primary node

Question 10

The process of bringing a Primary node back online and into the replica set after it has failed is known as:

• Self healing
• Primary restore
• Secondary replace
• Online rehealing

Answer 10

• Self healing
  x Primary restore
  x Secondary replace
  x Online rehealing

Question 11

These are some of the benefits to scaling horizontally: [select any that apply]

• Leverage commodity hardware
• Highly specialized hardware
• More predictable costs
• Easier to scale up

Answer 11

• Leverage commodity hardware
  x Highly specialized hardware
• More predictable costs
  x Easier to scale up

Question 12

In MongoDB, a best practice is to have at least a ____ ____ replica set to provide basic high availability. [two words]

Answer 12

Correct Answer: three member