PySpark and AWS: Master Big Data with PySpark and AWS - Total Marks by Male and Female Student

The video tutorial explains how to process student data to calculate total marks achieved by male and female students. It covers creating key-value pairs for gender and marks, using map and lambda functions for data manipulation, and applying reduce by key for aggregation. The tutorial emphasizes avoiding string indexing by converting data into lists and demonstrates the use of RDD map and reduce by key functions for efficient data processing.

What is the primary goal of the task discussed in the video?

• To calculate the average marks of students

• To find the highest marks achieved by a student

• To show the total marks achieved by male and female students

• To list all students who scored above a certain threshold

Why is it necessary to convert string data into a list?

• To make it easier to apply mathematical operations

• To enable the use of reduceByKey function

• To allow the data to be stored in a database

• To simplify the process of indexing and data manipulation

What is the key in the key-value pair created from the data?

• The student's gender

• The student's name

• The student's age

• The student's grade level

Why is it important to convert marks to integers before summation?

• To improve processing speed

• To comply with data type requirements

• To save memory space

• To ensure accurate summation

What does the reduceByKey function do?

• It filters out unwanted data

• It groups data by keys and applies a function to aggregate values

• It sorts data in ascending order

• It converts data into a different format

How does the reduceByKey function handle multiple values for the same key?

• It averages the values

• It selects the maximum value

• It sums the values using a lambda function

• It concatenates the values into a string

What is the outcome of the reduceByKey operation in this task?

• A list of students who scored above average

• A ranking of students based on their scores

• The total marks achieved by each student

• The total marks achieved by male and female students