Free Apache-Cassandra-Developer-Associate Exam Questions - Easiest Way for Success

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Total 118 Questions | Updated On: Sep 13, 2024

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Question 1

You have a single datacenter 10-node cluster with a replication factor of 3.

What can NOT happen on an UPDATE query for one single row, when the consistency level is set to ONE?

A : An incoming write will go only to the first node that owns the requested row.

B : Only one node can properly complete the write

C : The other two replicas can miss the write.

D : Coordinator returns control back to the client after one single write is confirmed.

Answer: A

Question 2

You execute queries with CL THREE on a single datacenter cluster with RF 3.

Why all operations are strongly consistent?

A : Because this is equivalent to the ANY consistency level.

B : Because CL THREE guarantees strong consistency.

C : Because RF 3 guarantees strong consistency.

D : Because there are 3 replicas in total and they must all confirm any read or write operation.

Answer: D

Question 3

Primary keys:

A : identify the nodes in the cluster that store the row(s).

B : uniquely identify rows in a table and determine their sort order.

C : uniquely identify rows in a partition and determine their sort order.

D : are alternative surrogate keys for row numbers.

Answer: B

Question 4

How to define the primary key of a Country table, if we want individual records by country and state, and filtered lists of cities by a population range?

A : PRIMARY KEY (country, state, city, population)

B : PRIMARY KEY ((country, state), city, population)

C : PRIMARY KEY ((country, state), population, city)

D : PRIMARY KEY (country, state, population, city)

Answer: C

Question 5

Consider the following keyspace definition:

1. CREATE KEYSPACE mykeyspace

2. WITH replication = {'class': 'NetworkTopologyStrategy', 'DC1': 3, 'DC2': 3};

DC1 has 4 nodes active and 2 down, DC2 has 3 nodes active and one down.

Which of the next statements is true?

A : A request with LOCAL_QUORUM on a healthy DC2 node will be handled by DC1.

B : A request with LOCAL_QUORUM on a healthy DC2 node will succeed.

C : A request with QUORUM on a healthy DC2 node will fail.

D : A request with LOCAL_QUORUM on a healthy DC1 node will fail.

Answer: B

Page: 1 / 24

Total 118 Questions | Updated On: Sep 13, 2024

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