What are Intermediate and Terminal operations?

Intermediate Operations: 

• Process the stream elements.
• Typically transforms a stream into another stream.
• Are lazy, i.e., not executed till a terminal operation is invoked.
• Does internal iteration of all source elements.
• Any number of operations can be chained in the processing pipeline.
• Operations are applied as per the defined order.
• Intermediate operations are mostly lambda functions.

Terminal Operations:

• Kick-starts the Stream pipeline.
• used to collect the processed Stream data.

Example 

int count = Stream.of(1, 2, 3, 4, 5)

.filter(i -> i <4) // Intermediate Operation filter

.count(); // Terminal Operation count