Deck 14: Big Data and Nosql

Question 1

Hadoop is a database that has become the de facto standard for most Big Data storage and processing.

Answer 1

True

Question 2

In many ways, the issues associated with volume and velocity are the same.​

Answer 2

True

Question 3

Characteristics that are important in working with data in the relational database model also apply to Big Data.

Answer 3

True

Question 4

​​A block report is used to let the name node know that the data mode is still available.

Question 5

​Scaling out is keeping the same number of systems, but migrating each system to a larger one.

Question 6

A reduce function takes a collection of key-value pairs with the same key value and summarizes them into a single result.

Question 7

​​​Flume is a tool for converting data back and forth between a relational database and the HDFS.

Question 8

The ability to graphically presentdata in a way that makes it understandable is the concept of value.

Question 9

Hive is a good choice for jobs that require a small subset of data to be returned very quickly.​

Question 10

​​Relational databases rely on unstructured data.

Question 11

​Most NoSQL products run only in a Linux or Unix environment.

Question 12

​​​Under the HDFS system, using a write-one, ready-many model simplifies concurrency issues.

Question 13

Key-value and document databases are structurally similar.

Question 14

Big Data processing imposes a structure on the data as needed for applications as a part of retrieval and processing.

Question 15

A column family database is a NoSQL database model that organizes data in key-value pairs with keys mapped to a set of columns in the value component.

Question 16

Interest in graph databases can be tied to the area of social networks.​

Question 17

The name, MongoDB, comes from the word humongous as its developers intended their new product to support extremely large data sets.

Question 18

For a data set to be considered Big Data, it must display only one of the 3Vs (volume, velocity and variety).

Question 19

The analysis of data to produce actionable results is feedback loop processing.

Question 20

Lack of specificity is what leads to ambiguity in defining Big Data.

Question 21

Which of the following is NOT one of the standard NoSQL categories?

A) Document databases
B) Column-oriented databases
C) Graph databases
D) Chart databases

Question 22

______ was the first SQL on Hadoop application.

A) Flume
B) Pig
C) Sqoop
D) Impala

Question 23

When using MapReduce,best practices suggest that the number of mappers on a given node should be ______.

A) 50 or less
B) over 100 but less than 300
C) 100 or less
D) at least 300

Question 24

______processing occurs when a program runs from beginning to end without any user interaction.

A) Hadoop
B) Block
C) Hive
D) Batch

Question 25

When using a HDFS, a heartbeat is sent every ______ to notify the name node that the data mode is still available.

A) 3 hours
B) 3 seconds
C) 6 hours
D) 6 seconds

Question 26

______is NOT one of the "3 Vs" of Big Data.

A) Volume
B) Velocity
C) Validation
D) Variety

Question 27

Which of the following is NOT a key assumption of the Hadoop Distributed File System?

A) High volume
B) Write many,read-once
C) Streaming access
D) Fault-tolerance

Question 28

______ is a tool for converting data back and forth between a relational database and the HDFS.

A) ​Flume
B) ​Pig
C) ​Sqoop
D) ​Impala

Question 29

In the context of Big Data, ______ relates to changes in meaning.

A) variety
B) variability
C) veracity
D) viability

Question 30

Big Data ______.

A) relies on the use of structured data
B) captures data in whatever format it naturally exists
C) relies on the use of unstructured data
D) imposes a structure on data when it is captured

Question 31

By default, Hadoop uses a replication factor of ______.

A) one
B) two
C) three
D) four

Question 32

​A(n) ______ is a process or set of operations in a calculation.

A) ​algorithm
B) ​feedback loop
C) ​stream
D) ​structure

Question 33

In the context of Big Data, ______ refers to the trustworthiness of a set of data.

A) value
B) variability
C) veracity
D) viability

Question 34

______ is keeping the same number of systems, but migrating each system to a larger system.

A) Clustering
B) Scaling up
C) Streaming
D) Scaling out

Question 35

When using a HDFS, the ______node creates new files by communicating with the______ node.

A) client; name
B) data; name
C) data; client
D) host; client

Question 36

Two of the most popular applications to simplify the process of creating MapReduce jobs are Hive and ______.

A) Flume
B) Pig
C) Sqoop
D) Impala

Question 37

To query the value component of the pair when using a key-value database, use get or ______.

A) store
B) fetch
C) retrieve
D) gather

Question 38

______ focuses on filtering data as it enters the system to determine which data to keep and which to discard.​

A) ​Scaling up
B) ​Feedback loop processing
C) ​Stream processing
D) ​Scaling out

Question 39

​When using MapReduce, a _______ function takes a collection and data and sorts and filters it into a set of key-value pairs.

A) ​reduce
B) ​map
C) ​data
D) ​block

Question 40

Document databases group documents into logical groups called ______.

A) buckets
B) sets
C) collections
D) blocks

Question 41

A(n)______ is a tag that is used to associate a collection of nodes as being of the same type or belonging to the same group.

A) edge
B) key
C) label
D) bucket

Question 42

A method of text analysis that attempts to determine if a statement conveys a positive, negative, or neutral attitude is referred to as______analysis.

Question 43

​______ isthe coexistence of a variety of data storage and data management technologies within an organization's infrastructure.

Question 44

_______ ​languages allow the user to specify what they want, not how to get it which is very useful for query processing.

Question 45

Data collected or aggregated around a central topic or entity is said to be ______ aware.

A) aggregate
B) transversally
C) feedback
D) visually

Question 46

______refers to the analysis of the data to produce actionable results.

Question 47

Graph theory is a mathematical and computer science field that models relationships, or edges, between objects called ______.

A) maps
B) scales
C) buckets
D) nodes

Question 48

​______minimizes the number of disk reads necessary to retrieve a row of data.

A) C​olumn-oriented database
B) ​Row-centric storage
C) Column-family database
D) ​Column-centric storage

Question 49

​WithinHadoop, is used for producing data pipeline tasks that transform data in a series of steps.

Question 50

​WithinHadoop, can transfer data in both directions - into and out of HDFS.

Question 51

In MongoDB, ______ method retrieves objects from a collection that match the restrictions provided.

A) count*
B) read*
C) review[]
D) find()

Question 52

A ______ is a programmed function within an object used to manipulate the data in that same object.

A) batch
B) method
C) block
D) node

Question 53

Neo4j is a ______ database.

A) graph
B) column family
C) key-value
D) row-centric

Question 54

Modeling and storing data about relationships is the focus of ______ databases.

A) key-value
B) column-oriented
C) document d
D) graph

Question 55

Within MapReduce, a(n) ______ runs maps and reduces tasks on nodes.

Question 56

Mostorganizations that use Hadoop also use a set of other related products that interact and complement each other to produce an entire ______ of applications and tools.

Question 57

______ is the Big Data 3 V that relates to the speed at which data is entering the system.

Question 58

In MongoDB, the______ method is used to improve the readability of retrieved documents through the use of line breaks and indention.

A) pretty()
B) clean*
C) break[]
D) filter+

Question 59

Scaling out is also referred to as _______.

Question 60

A query in a graph database is called a ______.

A) schema
B) hierarchy
C) traversal
D) script

Question 61

In acolumn family database, a column that is composed of a group of other related columns is called a(n) ______.

Question 62

Discuss NewSQL and what it attempts to do.​

Question 63

Adatabase model that attempts to provide ACID-compliant transactions across a highly distributed infrastructure is ______.

Question 64

______ is used to extract knowledge from sources of data-NoSQL databases, Hadoop data stores, and data warehouses-to provide decision support to all organizational users.

Question 65

Discuss the need for a Hadoop ecosystem and identify the key components.

Question 66

_____ are like attributes; they are the data that we need to store about the node.

Question 67

In agraph database, the representation of a relationship between nodes is called a(n) ______.

Question 68

Discuss the 3 Vs of Big Data. How has the definition of Big Data regarding these items changed over time?

Question 69

______ do not store relationships as perceived in the relational model and generally have no support for join operations.

Question 70

______ is a human-readable text format for data interchange that defines attributes and values in a document.

Question 71

______databases simply store data with no attempt to understand the contents of the value component or its meaning.

Question 72

The interactive, declarative query language in Neo4j is called ______.

Question 73

What is NoSQL and what are the major NoSQL approaches (categories)?

Question 74

Define the four key assumptions of the Hadoop Distributed File System (HDFS).

Question 75

______ ​refers to traditional, relational database technologies that use column-centric, not row-centric storage.