Questions & Answers about Sjåføren sjekker lastebilen.
Because -en is the usual definite ending for many masculine nouns in Norwegian. It works like English the attached to the end of the noun.
- sjåfør = driver
sjåføren = the driver
- lastebil = truck
- lastebilen = the truck
So instead of using a separate word like the, Norwegian often adds the definite ending directly to the noun.
In Norwegian, definiteness is usually marked with a suffix on the noun rather than with a separate word.
So:
- the driver → sjåføren
- the truck → lastebilen
This is one of the biggest differences from English.
A separate determiner can appear in some other structures, especially with adjectives:
- the truck = lastebilen
- the big truck = den store lastebilen
But in your sentence, there are no adjectives, so the ending alone is enough.