100% Free DataStax Apache-Cassandra-Developer-Associate Practice Test Questions and Answers 2026

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Total 118 Questions | Updated On: May 23, 2026

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Question 1

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 2

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 3

What is a NOT a valid limitation for Cassandra counters?

A : Counters cannot be used for columns part of the PRIMARY KEY of a table.

B : Counter values cannot go below zero.

C : The value of a counter cannot be set.

D : A table that contains a counter can only contain counters.

Answer: B

Question 4

What is wrong with this user-defined type (UDT) definition?1. CREATE TYPE States (2. id uuid PRIMARY KEY,3. name text4. );

A : UDTs cannot declare primary keys.

B : UUID is not a valid CQL data type.

C : Must start by CREATE TYPE IF NOT EXISTS.

D : The name should be all lower cases.

Answer: A

Question 5

What is an example of hybrid-cloud deployment?

A : Cassandra in on-premise data center accessed from AWS virtual machines.

B : Cassandra deployed on both on-premise and on Azure virtual machines.

C : Cassandra in two inter-connected on-premise data centers.

D : Cassandra in two separate on-premise data centers.

Answer: B

Page: 1 / 24

Total 118 Questions | Updated On: May 23, 2026

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