Loading Data into DataFrames with Apache Spark
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Questions and Answers

The load method can be used to load a JSON file and return the result as a DataFrame.

True

The save method can be used to insert the content of the DataFrame into a database table via ODBC.

False

The read method can be used to load a CSV file and return the result as a DataFrame.

True

The format method is used to specify the output format when saving the DataFrame.

<p>False</p> Signup and view all the answers

The write method can be used to save the content of the DataFrame in Parquet format at the specified path.

<p>True</p> Signup and view all the answers

The partitionBy method is used to specify the columns to partition the output by when saving the DataFrame.

<p>True</p> Signup and view all the answers

The write operation can be used to create a new table from the contents of a DataFrame.

<p>True</p> Signup and view all the answers

The write operation can only be used to create a new table and cannot be used to replace an existing table.

<p>False</p> Signup and view all the answers

The overwrite operation is used to overwrite all partitions of the output table with the contents of the DataFrame.

<p>False</p> Signup and view all the answers

The write operation can be used to save the content of a DataFrame in a text file at a specified path.

<p>True</p> Signup and view all the answers

The write operation can only be used to save data in a text file and cannot be used to save data in other formats.

<p>False</p> Signup and view all the answers

The read method can be used to load a Parquet file and return the result as a DataFrame.

<p>True</p> Signup and view all the answers

The write method can be used to save the content of a DataFrame to an external database table via ODBC.

<p>False</p> Signup and view all the answers

The save method can be used to load data from a data source and return it as a DataFrame.

<p>False</p> Signup and view all the answers

The write method can be used to save the content of a DataFrame in JSON format at a specified path.

<p>True</p> Signup and view all the answers

The load method can be used to add input options for the underlying data source.

<p>False</p> Signup and view all the answers

The write method can be used to partition the output by the given columns on the file system.

<p>True</p> Signup and view all the answers

The read method can be used to load data from a data source and return it as a DataFrame with a schema starting with a string column named 'value'.

<p>False</p> Signup and view all the answers

The write operation can be used to overwrite specific rows in the output table based on a filter condition.

<p>True</p> Signup and view all the answers

The partitionBy method is used to specify the provider for the underlying output data source.

<p>False</p> Signup and view all the answers

The write operation can be used to append the contents of the data frame to the output table.

<p>True</p> Signup and view all the answers

The write operation can only be used to create a new table or replace an existing table but not to append to an existing table.

<p>False</p> Signup and view all the answers

The write operation can be used to save the content of the DataFrame in a database table via ODBC.

<p>False</p> Signup and view all the answers

The write operation is used to sort the output in each bucket by the given columns on the file system.

<p>True</p> Signup and view all the answers

The write operation can be used to overwrite all partitions of the output table for which the data frame contains at least one row.

<p>True</p> Signup and view all the answers

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