In general, Berserk doesn't cover the whole manga. Some storylines and details might be missing or adapted differently for various reasons, like production constraints or creative choices.
No, the Berserk anime doesn't cover all of the manga. It selectively adapts certain parts, and some crucial elements and developments from the manga are absent in the anime version.
Berserk manga has been in publication for many years. The story is extensive and rich in detail. But it's hard to give an exact number of years as it depends on various factors.
The Berserk manga has a considerable length with a large number of volumes. But it's hard to give an exact number as it's still ongoing and the count can change.
The story of Berserk: Name of the Hawk is of a considerable length, but the exact duration can vary depending on how quickly you read or engage with it.