Question

Each aggregation stage is specified in a ___, which is a(n) ___ in the aggregate() method.

Answer 1

Java Aggregation and aggregate() method in the aggregate() method.

Step-by-step explanation:

Java Aggregation and aggregate() method

In Java, aggregation is a way to represent a relationship between two classes. It allows one class to have a reference to another class as one of its properties. The aggregate() method in Java is used to perform operations on a collection of objects by specifying an aggregation stage.

Example:

Suppose you have a list of students and you want to find the average age of the students. You can use the aggregate() method with the aggregation stage 'average', which will calculate the average age of the students. This is specified as follows:

students.aggregate(Aggregates.average("age"))