# Architecture & Installation

### Question 1: Which of the following features of Cassandra help solve the problems of Big Data?

>Data is found redundantly across the cluster
>Cassadra architecture is node-based
>Cassandra is always on
>You can read or write to any node

### Question 2: What are the features of Cassandra Debian and RPM Package Manager or RPM-based systems?

>The site www.planetcassandra.org/cassandra/ is run by DataStax
>There are Community and Enterprise Editions, depending on your requirements

### Question 3: What are the features of partitioning in Cassandra?

>Replication factor is configured in the casandra.yaml file
>Replication is controlled at the keyspace level
>Simple strategy enables data to be replicated across racks
>The cassandra.yaml file controls the number of copies of a row of data in a cluster

### Question 4: What are the features of Apache Cassandra NodeTool?

>nodetool always takes the port that Cassandra's listening on as an argument
>The nodetool command takes the host as an argument

### Question 5: What are the three Vs of Big Data?

>Volume, Velocity, Variety

### Question 6: Which among the following are the features of partitioning in Cassandra?

>Random partitioning helps as you to get higher throughput
>With order partitioning, data is not distributed across the cluster
>Random partitioning is based on hashing data and using the hash result

### Question 7: Which of the following commands will start a Cassandra node?

>bin/cassandra

### Question 8: What are the features of cqlsh with Apache Cassandra?

>Cassandra Query Language or CQL is structured similarly to SQL
>All statements must end in a semicolon

### Question 9: What are the important directories in an Apache Cassandra installation?

>conf
>saved_caches
>commitlog
>data

### Question 10: Which of the following is least guaranteed by Cassandra?

>Consistency

### Question 11: Which of the following commands will stop a Cassandra node numbered 1160?

>kill 1160