WorksheetsIntroduction to Big Data
Total questions: 50
Worksheet time: 38mins
Big Data refers to data that is:
Small and structured
Difficult to store using traditional databases
Only numerical
Stored only in spreadsheets
Which of the following best defines Big Data?
Data stored in files
Large volume of data generated at high speed
Data in databases
Backup data
Big Data is mainly generated from:
Typewriters
Social media, sensors, and transactions
Paper records
Calculators
Which era led to the rapid growth of Big Data?
Mechanical era
Digital and internet era
Industrial revolution
Pre-computer era
Big Data processing generally requires:
Single computer systems
Distributed computing systems
Manual processing
Local storage only
Which of the following is NOT a characteristic of Big Data?
Volume
Velocity
Variety
Validity
Volume in Big Data refers to:
Speed of data generation
Size of data
Accuracy of data
Data format
Velocity refers to:
Data quality
Data storage method
Speed of data generation and processing
Variety in Big Data means:
Only text data
Structured data only
Different data formats like text, images, videos
Duplicate data
Veracity refers to:
Data size
Data trustworthiness
Data speed
Data type
Structured data is best stored in:
Text files
Relational databases
Images
Videos
Which is an example of unstructured data?
Tables
CSV files
Images
Excel sheets
Semi-structured data example is:
Relational table
XML or JSON
Image file
Video file
Data stored in rows and columns is called:
Unstructured
Semi-structured
Structured
Raw data
Social media posts are an example of:
Structured data
Semi-structured data
Unstructured data
Metadata
Big Data is widely used in:
Healthcare
Finance
Education
Which application uses Big Data for recommendation systems?
Banking
E-commerce
Agriculture
Manufacturing
Big Data helps in healthcare mainly for:
Entertainment
Disease prediction and diagnosis
Gaming
Networking
Which sector uses Big Data for fraud detection?
Banking
Education
Sports
Tourism
Traffic management systems use Big Data for:
File storage
Route optimization
Database backup
Image editing
Big Data helps organizations to:
Increase paperwork
Make data-driven decisions
Reduce data
Avoid automation
One major benefit of Big Data analytics is:
Increased cost
Faster decision making
Data loss
Manual reporting
Big Data improves business performance by:
Ignoring customer data
Predicting trends and behavior
Reducing storage
Limiting data access
Which of the following is an advantage of Big Data?
Better customer insights
High hardware cost only
Complex manual processing
Big Data is important because it:
Replaces computers
Handles large and complex datasets
Reduces internet usage
Eliminates databases
Serialization is the process of:
Encrypting data
Converting objects into a byte stream
Deleting objects
Compressing files
Serialization is mainly used for:
Object storage and transmission
Data deletion
Data visualization
Image processing
In Java, which interface is used for serialization?
Cloneable
Serializable
Runnable
Comparable
Deserialization means:
Converting object to byte stream
Converting byte stream back to object
Encrypting data
Deleting data
Serialization is useful in:
Distributed systems
Single-user systems only
Offline applications
Manual processing
Wrapper classes are used to:
Convert objects to files
Convert primitive data types into objects
Delete data
Compress data
Which is a wrapper class for int?
Integer
Int
Number
Wrapper classes belong to which package in Java?
java.io
java.lang
java.util
java.sql
Which of the following is NOT a wrapper class?
Double
Character
String
Boolean
Wrapper classes support:
Object-oriented features
Only primitive operations
Hardware execution
Compilation only
Scaling out means:
Increasing CPU speed
Adding more machines
Increasing memory of one system
Reducing nodes
Distributed File System stores data:
On a single machine
Across multiple machines
Only in memory
On external drives
Scaling out is preferred over scaling up because it:
Is cheaper and flexible
Uses one system
Reduces availability
Limits growth
A Distributed File System improves:
Data availability
Single-user access
Manual processing
Local storage
Which is a feature of Distributed File Systems?
Centralized storage only
Fault tolerance
Low scalability
GFS was developed by:
Microsoft
Amazon
IBM
GFS is designed mainly for:
Small files
Large data-intensive applications
Desktop applications
Mobile apps
Hadoop Distributed File System (HDFS) is inspired by:
NTFS
FAT
GFS
EXT4
Hadoop is mainly used for:
Image editing
Big Data storage and processing
Gaming
Web browsing
Hadoop ecosystem includes:
HDFS, MapReduce, YARN
Word, Excel
HTML, CSS
C, C++
HDFS stores data in the form of:
Tables
Blocks
Rows
Objects
Hadoop is best suited for:
Small datasets
Large-scale data processing
Real-time gaming
Image design
Which Hadoop component manages resources?
HDFS
MapReduce
YARN
Hadoop works on the principle of:
Centralized computing
Distributed computing
Sequential processing
Manual processing
The main advantage of Hadoop ecosystem is:
Low fault tolerance
High cost
Scalability and fault tolerance
Limited storage
