(1)Continuous uptime and low latency is achieved in NoSQL systems as compared to traditional relational databases.
Yes
No
Correct Answer of the above questions is :Yes
(2)What is meant by 'Active everywhere design'?
There is no single point of failure
All nodes communicate with each other
All nodes are equal
All nodes can be written to and read from
Correct Answer of the above questions is :All nodes can be written to and read from
(3)Cassandra is a __________ architecture.
3-teir
peer-to-peer
None of the options mentioned
Master-slave
Correct Answer of the above questions is :peer-to-peer
(4)Cassandra is not suitable for IoT applications.
False
True
Correct Answer of the above questions is :False
(5)Which among the following is a NoSQL db?
MongoDB
Couchbase
Cassandra
All of the options mentioned
Correct Answer of the above questions is :All of the options mentioned
(6)Which of the following statements about NoSQL databases is true?
Do not provide horizontal scalability
Support unstructured data
Do not support Query Language
All of the options mentioned
Correct Answer of the above questions is :Support unstructured data
(7)Which Linux flavour can be used for Cassandra Installation?
CentOS
Debian
Red Hat
All of the options mentioned
Correct Answer of the above questions is :All of the options mentioned
(8)Which command can be used to list all available commands/operations in Cassandra?
CAPTURE
SHOW
HELP
EXPAND
Correct Answer of the above questions is :HELP
(9)SSTable resides in memory.
False
True
Correct Answer of the above questions is :False
(10)Which type of data model does Cassandra use?
Key-value data model
Both key-value and tabular data models
Tabular data model
Multivalue model
Correct Answer of the above questions is :Both key-value and tabular data models
(11)Java instance should be running in the machine inorder to setup Cassandra.
No, you do not require
It's optional
Yes, java must be running in the machine
None of the options mentioned
Correct Answer of the above questions is :Yes, java must be running in the machine
(12)Cluster can have multiple seed nodes.
True
False
Correct Answer of the above questions is :True
(13)A bloom filter can return __________.
Bloom-filter does not help in locating data
A false negative
the exact location of the requested data
A false positive
Correct Answer of the above questions is :A false negative
(14)What are ‘seed nodes’ in Apache Cassandra?
There must be at least one seed node in a cluster
One may configure more than one seed node for added redundancy
They allow the instance to find the cluster on the very first startup
All of the options mentioned
When a node first starts, it contacts a seed node to bootstrap the gossip communication process.
Correct Answer of the above questions is :All of the options mentioned
(15)What is the default partitioner in Apache Cassandra cluster?
Murmur3Partitioner
ByteOrderedPartitioner
HashPartitioner
RandomPartitioner
Correct Answer of the above questions is :Murmur3Partitioner
(16)Cassandra attaches a timestamp to each version of the record and uses this to merge records .
No, Merge is not supported by cassandra.
Yes
No
Correct Answer of the above questions is :Yes
(17)Row cache is an in-memory cache, which stores recently read rows.
True
False
Answe:-True
(18)The simplest and the fastest read path is when the record is present in the __________.
Commit log
Row Cache
Partition Key cache
Bloom filter
Correct Answer of the above questions is :Row Cache
(19)Authorization capabilities for Cassandra use the familiar__________ security paradigm to manage object permissions.
ROLLBACK
COMMIT
GRANT
None of the options mentioned
Correct Answer of the above questions is :GRANT
(20)To be able to read data from compressed blocks, Cassandra consults __________.
Row cache alone
Compression offsets
commit log
compressed key cache
Correct Answer of the above questions is :Compression offsets
(21)Pick the correct statements.
Row cache is an in-memory cache.
Key Cache maps recently read partition keys to specific SSTable offset.
Compaction offsets keeps the offset mapping information for compressed blocks.
Partition Indexes are sorted partition keys mapped to their SSTable offsets.
All of the options mentioned
Correct Answer of the above questions is :All of the options mentioned
(22)What is C-A-P, in CAP theorem?
Concurrency 2) Atomicity and 3) Partition tolerance
Consistency 2) Availability and 3) Partition tolerance
Consistency 2) Atomicity and 3) Partition tolerance
Concurrency 2) Availability and 3) Primary indexing
Correct Answer of the above questions is :Consistency 2) Availability and 3) Partition tolerance
(23)Is Timestamp an optional field in Column?
False
True
Correct Answer of the above questions is :True
(24)Pick the correct statement.
Under each column-family, there can be multiple rows.
All the options mentioned
A cluster can have more than one key-space.
There can be one or more column-family under a key-space.
Correct Answer of the above questions is :All the options mentioned
(25)Pick the correct statement.
Each keyspace has at least one and often many column families.
None of the options mentioned
Any column cannot be added to a column family after creation.
Column families do not represent the structure of your data.
Correct Answer of the above questions is :Each keyspace has at least one and often many column families.
(26)Which among the following is not a Replica Placement strategy?
Simple Strategy
Network Topology Strategy
None of the options mentioned
Old Network Topology Strategy
Correct Answer of the above questions is :None of the options mentioned
(27)Keyspace is analogous to __________ in realtional world.
columns
database
data types
records
Correct Answer of the above questions is :database
(28)Which among the following is the right syntax for 'Using a Keyspace'?
REUSE
USE CURRENT
USE
USE
Correct Answer of the above questions is :USE
(29)Pick the correct statement.
Primary key is a column.
Primary key is used to uniquely identify a row.
Primary key can be composed of more than one column.
Primary key is mandatory in creating a table.
All of the options mentioned
Correct Answer of the above questions is :All of the options mentioned
(30)Which of the following statements is true about CQL?
CQL does not support joins.
CQL model is close to SQL.
CQL supports prepared statements.
All of the options mentioned
CQL supports joins.
Correct Answer of the above questions is :All of the options mentioned
(31)What is the primary language for communicating with the Apache Cassandra™ database?
CQL
None of the options mentioned
SQL
HQL
Correct Answer of the above questions is :CQL
(32)Which directory contains Cassandra configuration files?
lib
interface
bin
conf
Correct Answer of the above questions is :conf
(33)Defining a primary key is mandatory while creating a table.
True
False
Answer:True
(34)Which Linux flavour can be used for Cassandra Installation?
Red Hat
All of the options mentioned
CentOS
Debian
Correct Answer of the above questions is :All of the options mentioned
(35)What can also be attributed as wide-row in Apache Cassandra?
Foreign Key
Clustering Key
Primary Key
Compound Key
Correct Answer of the above questions is :Compound Key
(36)Which collection type is used to maintain uniqueness of data structure?
Map
Heap
List
Set
Correct Answer of the above questions is :Set
(37)CQL features include __________.
All of the options mentioned
Nested user-defined types
Timestamps precise to the millisecond
Configurable counter cache
Correct Answer of the above questions is :All of the options mentioned
(38)How does Cassandra store data?
By dividing all data evenly around a cluster of nodes, which can be visualized as a ring.
By storing all data in the master node and directing them to slaves as per request.
There is no specified scheme set for data storage.
By storing data in slave nodes and storing its offsets in master node.
Correct Answer of the above questions is :By dividing all data evenly around a cluster of nodes, which can be visualized as a ring.
(39)NoSQL db - Cassandra is of type __________.
Graph databases
Document databases
Wide-column stores
Key-value databases
Correct Answer of the above questions is :Wide-column stores
(40)Which of the following is not part of SSTable?
Bloom filter
Data
Memtable
Index
Correct Answer of the above questions is :Memtable
(41)What is the use of commit log?
Monitoring
Crash-recovery
Performance Improvement
Logging
Correct Answer of the above questions is :Crash-recovery
(42)What is the primary language for communicating with the Apache Cassandra database?
Cassandra do not support query language.
HQL
SQL
CQL
Correct Answer of the above questions is :CQL
(43)In cassandra consistency is achieved through consistency tuning mechanisms.
False
True
Correct Answer of the above questions is :True
(44)Minimum JVM version required for Cassandra is __________.
1.3
1.6
1.4
1.5
Correct Answer of the above questions is :1.6
(45)__________ is a collection of related nodes.
Data center
Ring
Node
Cluster
Correct Answer of the above questions is :Data center
(46)Cassandra supports ACID transactions?
False
True
Correct Answer of the above questions is :False
(47)Which OS does Cassandra support?
Both Windows and Linux
None of the options mentioned
Linux
Windows
Correct Answer of the above questions is :Both Windows and Linux
(48)Primary key is a column that is used to uniquely identify a row.
False
True
Correct Answer of the above questions is :True
(49)What can be used to monitor clock drifts?
SSH
NTP
HTTP
JMX
Correct Answer of the above questions is :NTP
(50)__________ can be configured per table for non-QUORUM consistency levels.
Write repair
Write damage
Read damage
Read repair
Correct Answer of the above questions is :Read repair
(51)Replication can be configured to work across __________.
Single Data center
Single Ring
single cloud availability zones
one or more Data Centers
Correct Answer of the above questions is :one or more Data Centers
(52)Which technique is used for error correction for every compressed block?
Parity bit
CRC
Hashing
ECC
Correct Answer of the above questions is :CRC
(53)Cassandra will keep appending the records into the Commit Log and then to the memtable.
False
True
Correct Answer of the above questions is :True
(54)What percentage is the default threshold of memory used for flushing of the largest Memtables?
75
80
50
65
Correct Answer of the above questions is :65
(55)CQL features include __________.
Nested user-defined types
All of the options mentioned
Timestamps precise to the millisecond
Configurable counter cache
Correct Answer of the above questions is :All of the options mentioned
(56)User accounts may be altered and dropped using the __________ Query Language.
Cassandra
Sqoop
None of the options mentioned
Hive
Correct Answer of the above questions is :Cassandra
(57)Cassandra promotes __________ operation.
Read-after-write
Read-before-read
Read-before-write
Write-after-write
Correct Answer of the above questions is :Read-before-write
(58)Which directory contains Cassandra configuration files?
bin
interface
conf
lib
Correct Answer of the above questions is :conf
(59)Which among the following is not a performance measurement tool?
iostat
cmstat
None
dstat
Correct Answer of the above questions is :None
(60)How does Murmur3Partitioner work?
None of the options mentioned
Order keys as per byte values
Order values
Fast hash-based partitioner
Correct Answer of the above questions is :Fast hash-based partitioner
(61)Partitioners supported by Cassandra are __________.
All of the options mentioned
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