ADE ADE Cloud & Big Data Technologies 3

Question 1

What is 'data partitioning' in the context of cloud storage and big data?

Accepted Answer

Dividing data into logical segments to improve query performance and manageability

Answer

Encrypting data into separate secure sections

Answer

Replicating data across multiple cloud regions

Answer

Splitting a dataset into training and test sets for ML

Question 2

In Spark, what transformation is used to combine two DataFrames based on a common key?

Accepted Answer

join()

Answer

union()

Answer

merge()

Answer

aggregate()

Question 3

Which concept describes the ability of a cloud data system to handle growing data volumes by adding more nodes?

Accepted Answer

Horizontal scaling

Answer

Vertical scaling

Answer

Load balancing

Answer

Data sharding

Question 4

What does HDFS stand for in the Hadoop ecosystem?

Accepted Answer

Hadoop Distributed File System

Answer

High-Definition File Storage System

Answer

Hierarchical Data Filing Structure

Answer

Hybrid Data Federation Service

Question 5

In a Lambda architecture, what is the role of the speed layer?

Accepted Answer

To provide low-latency real-time views of recent data

Answer

To process historical batch data for accuracy

Answer

To serve pre-computed batch views to end users

Answer

To manage metadata and schema definitions

Question 6

Which file format supports ACID transactions natively in a data lake environment?

Accepted Answer

Delta Lake (Delta format)

Answer

ORC

Answer

Avro

Answer

CSV