Apache Spark 3 for Data Engineering and Analytics with Python - Inserting Records into a Table

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Information Technology (IT), Architecture, Social Studies
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University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main reason for the error encountered when querying the DataFrame using Spark SQL?
The DataFrame is too large.
The DataFrame is missing columns.
The DataFrame is not loaded.
The DataFrame is not compatible with pure SQL.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of converting a DataFrame into a temporary table?
To change its schema.
To improve its performance.
To reduce its size.
To make it compatible with Spark SQL.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a characteristic of temporary tables?
They require a unique name.
They cannot be queried.
They are stored permanently.
They are available only within the current session.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you check if two tables are compatible with each other?
By comparing their sizes.
By using the describe command.
By checking their names.
By querying them together.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which language is used to retrieve data from a database?
Data Query Language (DQL)
Data Definition Language (DDL)
Data Control Language (DCL)
Data Manipulation Language (DML)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the overwrite command do in a DML statement?
Creates a backup of the table.
Changes the schema of the table.
Adds new data without deleting old data.
Deletes existing data before inserting new data.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using back ticks in a select statement?
To change the data type.
To improve query performance.
To handle column names with spaces.
To comment out the code.
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