Enem Nostrum Remedies Interview Questions, Process, and Tips

To rename a column in PySpark, use the 'withColumnRenamed' method.

• Use the 'withColumnRenamed' method on the DataFrame

• Specify the current column name and the new column name as arguments

• Assign the result to a new DataFrame to store the renamed column

Multiprocessing involves executing multiple processes simultaneously, while multithreading involves executing multiple threads within a single process.

• Multiprocessing utilizes multiple CPUs or cores to execute multiple processes concurrently.

• Multithreading involves creating multiple threads within a single process to execute tasks concurrently.

• Processes in multiprocessing have separate memory spaces, while threads in m...read more

QA/QC stands for Quality Assurance/Quality Control. Plaster of Paris chemical formula is CaSO4.1/2H2O.

• QA/QC is a set of activities that ensure quality in a product or service.

• QA focuses on preventing defects while QC focuses on identifying and correcting defects.

• Plaster of Paris is a white powder made from gypsum that hardens when mixed with water.

• Its chemical formula is CaSO4.1/2H2O, which means it contains one molecu...read more