Free DataStax Apache-Cassandra-Developer-Associate Exam Questions

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

Page: 1 / 24

Total 118 Questions | Updated On: Jul 15, 2026

Add To Cart

Question 1

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 2

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 3

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

Question 4

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 5

What is wrong with this user-defined type (UDT) definition?

1. CREATE TYPE States (

2. id uuid PRIMARY KEY,

3. name text

4. );

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

Page: 1 / 24

Total 118 Questions | Updated On: Jul 15, 2026

Add To Cart