Free DataStax Apache-Cassandra-Developer-Associate Exam Questions

Become DataStax Certified with updated Apache-Cassandra-Developer-Associate exam questions and correct answers

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Total 118 Questions | Updated On: Jun 16, 2026

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Question 1

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 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

Define the primary key for accounts_by_user:

A : PRIMARY KEY (username, account_number ASC)

B : PRIMARY KEY ((username), account_number)

C : PRIMARY KEY (username, (account_number))

D : PRIMARY KEY ((username, account_number))

Answer: B

Question 4

Which is NOT true for a read repair?

A : Read repair is a process of repairing data replicas during a read request.

B : Read repair runs in the foreground as a blocking operation.

C : Read repair ensures that data in your cluster stays in sync.

D : Read repair always occurs when consistency level is ANY.

Answer: D

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: Jun 16, 2026

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