Database Principles Chapter 16 Quiz: Big Data and NoSQL

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What does the term 'velocity' refer to in the context of big data?

The speed at which data is entered into the system and processed (correct)
The variations in the structure of data to be stored
The trustworthiness of the data
The quantity of data to be stored

How does 'scaling out' differ from 'scaling up' when managing big data?

Scaling out involves keeping the same number of systems, while scaling up involves exceeding the server capacity.
Scaling out involves migrating each system to a larger one, while scaling up involves spreading the workload across multiple servers.
Scaling out involves spreading the workload across multiple servers, while scaling up involves migrating each system to a larger one. (correct)
Scaling out involves exceeding the server capacity, while scaling up involves keeping the same number of systems.

Which characteristic of big data refers to variations in the structure of data to be stored?

Velocity
Variety (correct)
Veracity
Volume

What is meant by 'Veracity' in the context of big data?

The trustworthiness of the data (C) Signup and view all the answers

In the Hadoop framework, what are the core components responsible for?

Operational functions within the framework (C) Signup and view all the answers

Which type of databases focus on working with document storage like MongoDB?

NoSQL databases (B) Signup and view all the answers

Which processing approach is focused on the input processing and requires analysis of the data stream as it enters the system?

Stream Processing (B) Signup and view all the answers

What is the primary function of the Name Node in HDFS?

To contain file system metadata (C) Signup and view all the answers

Which of the following is NOT a characteristic of Hadoop Distributed File System (HDFS)?

Low latency (A) Signup and view all the answers

What is the primary function of the Map function in MapReduce?

To sort and filter data into a set of key-value pairs (B) Signup and view all the answers

What is the purpose of the Job Tracker in MapReduce?

To act as a central control program (B) Signup and view all the answers

Which NoSQL database model stores data as a collection of key-value pairs organised as buckets?

Key-value (D) Signup and view all the answers

What is the primary purpose of the Reduce function in MapReduce?

To produce a single result (B) Signup and view all the answers

What is Polyglot Persistence?

The coexistence of various data storage and management technologies (B) Signup and view all the answers

What is the primary function of the Sqoop tool in Hadoop ecosystem?

To convert data back and forth between a relational database and the HDFS (B) Signup and view all the answers

What is the purpose of the Feedback Loop Processing?

To analyse the data to produce actionable results (B) Signup and view all the answers

Which statement best describes the relationship between document databases and key-value databases?

Document databases are a subtype of key-value databases, storing data in key-value pairs. (D) Signup and view all the answers

Which statement is true regarding column-centric and row-centric storage in column-oriented databases?

Column-centric storage focuses on a single column across many rows, while row-centric storage focuses on all columns of a given set of rows. (A) Signup and view all the answers

What does aggregate awareness refer to in the context of aggregate aware database models?

Data collected around a central topic or entity, making it relatively independent. (B) Signup and view all the answers

What are the challenges faced by the relational model when dealing with Big Data?

The relational model struggles with data that is of such volume, velocity, variety, veracity, and value that it cannot adapt. (B) Signup and view all the answers

What is a key feature of NewSQL databases?

NewSQL databases integrate features of both RDBMS and NoSQL databases with a highly distributed infrastructure. (B) Signup and view all the answers

What is a column family in the context of column-oriented databases?

A column family is a group of columns treated as a single unit within a key-value pair. (C) Signup and view all the answers