DataStax Certified Cassandra Developer Certification Sample Questions

The purpose of this Sample Question Set is to provide you with information about the DataStax Apache Cassandra Developer Associate Certification exam. These sample questions will make you very familiar with both the type and the difficulty level of the questions on the Certified Cassandra Developer certification test. To get familiar with real exam environment, we suggest you try our Sample DataStax Apache Cassandra Certification Practice Exam. This sample practice exam gives you the feeling of reality and is a clue to the questions asked in the actual Apache Cassandra Developer Associate Certification exam.

These sample questions are simple and basic questions that represent likeness to the real DataStax Apache Cassandra Developer Associate Certification exam questions. To assess your readiness and performance with real-time scenario based questions, we suggest you prepare with our Premium DataStax Certified Cassandra Developer Certification Practice Exam. When you solve real time scenario based questions practically, you come across many difficulties that give you an opportunity to improve.

DataStax Certified Cassandra Developer Sample Questions:

01. You have a Hotels table with hotel_id as numeric primary key. Which of the following SELECT queries will fail?

a) SELECT * FROM Hotels WHERE hotel_id > 14 AND hotel_id < 100;

b) SELECT * FROM Hotels WHERE token(hotel_id) > 14 AND token(hotel_id) < 100;

c) SELECT * FROM Hotels WHERE hotel_id IN (14, 15, 223, 3);

d) SELECT * FROM Hotels WHERE hotel_id = 14;

02. How can you define the primary key for a table with country and state as partition keys, city and area as cluster keys?

a) PRIMARY KEY (country, state, city, area)

b) PRIMARY KEY (country, state, (city, area))

c) PRIMARY KEY ((country, state), city, area)

d) PRIMARY KEY (country, state), (city, area)

03. Which list does NOT have valid consistency levels in Cassandra?

a) ALL, ANY, SERIAL

b) QUORUM, LOCAL_QUORUM, EACH_QUORUM

c) ONE, LOCAL_ONE, TWO, THREE

d) REMOTE_ONE, REMOTE_QUORUM

04. When is a materialized view updated?

a) After the base table update, super fast.

b) After the base table update, but with an additional read before write.

c) After a few hours.

d) Asynchronously, after a read repair.

05. What is an example of multi-cloud deployment?

a) Cassandra in two inter-connected on-premise data centers.

b) Cassandra in two separate on-premise data centers.

c) Cassandra in separate AWS and Microsoft Azure virtual machines.

d) Cassandra in inter-connected AWS and Microsoft Azure virtual machines.

06. Which CL guarantees a request will not be handled by more than one data center?

a) QUORUM

b) ALL

c) LOCAL_ALL

d) LOCAL_QUORUM

07. In an Application Workflow diagram, Q2 and Q3 both require data collected by a top Q1. Q3 can be split up into Q31 and Q32. Which access patterns are evaluated before Q32?

a) Q1 and Q2

b) Only Q1

c) Q1 and Q3

d) Q1 and Q31

08. You have one datacenter cluster with a replication factor of 3. You issue a read request with a consistency level of QUORUM that hits one single partition. What is NOT possible?

a) Two replicas must respond to fulfill the read request.

b) The replica with the most recent version will return the requested data.

c) The third replica is checked for consistency with the first two.

d) A read repair will always take place at the end.

09. What happens with the internal in-memory data structures when a row gets updated?

a) The data is changed in-place.

b) The data is immediately written to disk.

c) A new record is appended, with new data only and nothing changed.

d) A new appended record will have the old and new data values, and a version number.

10. When to use lightweight transactions?

a) On insertion operations that must be unique.

b) On concurrent operations using batches.

c) With all CRUD operations.

d) For atomic operations within the same partition.

Answers:

Question: 01 Answer: a	Question: 02 Answer: c	Question: 03 Answer: d	Question: 04 Answer: b	Question: 05 Answer: c
Question: 06 Answer: d	Question: 07 Answer: b	Question: 08 Answer: d	Question: 09 Answer: c	Question: 10 Answer: a

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