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Guide for Certified Data Analyst Associate

Quiz Certified Data Analyst Associate

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Quiz

1/10
Performance Optimization Techniques
How can Z-Ordering optimize performance in a Databricks Delta Lake table when dealing with large datasets?
Select the answer
1 correct answer
A.
It organizes data within files to improve data skipping
B.
It compresses data automatically
C.
It partitions data based on workload
D.
It increases shuffles during query execution

Quiz

2/10
Understanding Databricks Workspace
Which component of the Databricks workspace allows you to create, edit, and run code interactively while collaborating with others?
Select the answer
1 correct answer
A.
Databricks Notebooks
B.
Databricks Jobs
C.
Databricks Repos
D.
Databricks Dashboards

Quiz

3/10
ETL Processes in Databricks
Which of the following features of Delta Lake makes it ideal for handling data quality in Databricks ETL processes?
Select the answer
1 correct answer
A.
ACID transactions
B.
Schema enforcement
C.
Time travel
D.
All of the above

Quiz

4/10
Using SQL Functions
In SQL, which function returns the first non-NULL value among its arguments when replacing NULL values in a dataset?
Select the answer
1 correct answer
A.
COALESCE
B.
NULLIF
C.
ISNULL
D.
NVL

Quiz

5/10
Data Analysis with Databricks SQL
Which of the following best describes the primary advantage of using Databricks SQL for data analysis?
Select the answer
1 correct answer
A.
It is primarily designed for transactional processing in OLTP systems.
B.
It provides an interactive environment that allows analysts to run SQL queries and visualize data without the need for complex configurations.
C.
It is a specialized programming language for deep learning and artificial intelligence.
D.
It is used exclusively for managing cloud storage resources.

Quiz

6/10
Creating Dashboards
What is one of the essential benefits of using interactive dashboards in Databricks?
Select the answer
1 correct answer
A.
It supports static reporting
B.
It enables interactive data exploration
C.
It requires extensive coding for each update
D.
It limits collaboration to a single user

Quiz

7/10
Data Import and Export
Which command in Databricks is used to copy a file from the local file system to DBFS?
Select the answer
1 correct answer
A.
dbutils.fs.cp
B.
spark.read.format
C.
dbutils.notebook.run
D.
dbutils.fs.ls

Quiz

8/10
Data Querying and Filtering
Which clause is used to filter rows in a SQL query before any grouping operations are applied?
Select the answer
1 correct answer
A.
WHERE
B.
HAVING
C.
GROUP BY
D.
ORDER BY

Quiz

9/10
Best Practices for Data Analysis
What is one of the key best practices for data analysis when handling large datasets?
Select the answer
1 correct answer
A.
Applying data sampling to reduce computation
B.
Performing proper data partitioning to optimize processing
C.
Using simple linear search regardless of data size
D.
Aggregating the entire dataset into one file

Quiz

10/10
Time Travel and Versioning in Delta Lake
Which feature of Delta Lake allows you to query historical data based on its version or timestamp?
Select the answer
1 correct answer
A.
Time travel query
B.
Schema evolution
C.
Data caching
D.
Streaming ingestion
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  • Quiz name:Certified Data Analyst Associate
  • Total number of questions:509
  • Number of questions for the test:50
  • Pass score:80%

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