The tiny hole in an airplane window, called a bleed hole, is a critical part of the aircraft's cabin pressurization system.
This bleed hole allows for pressure equalization between the cabin and the air gap between the window panes. It helps regulate the pressure difference, preventing stress on the window structure. Additionally, it allows any moisture that might seep into the gap to escape, preventing fogging and maintaining a clear view.
This information describes standard aircraft design features and is not a substitute for professional aviation maintenance advice.
Is a specific school required to become a flight attendant?
While some specialized training can be beneficial, most major airlines conduct their own comprehensive training programs for newly hired flight attendants. You typically need to be hired by an airline first.