독문학과를

In a sentence

• 저는 독문학과를 전공하고 있습니다.

  I am majoring in the German Literature department.

  Here, '독문학과를' specifies the object of the verb '전공하고' (majoring), which defines the academic focus.

• 독문학과를 졸업한 친구가 독일에서 일하고 있어요.

  A friend who graduated from the German Literature department is working in Germany.

  In this sentence, '독문학과를' identifies what the friend has graduated from, showing association.

• 그는 독문학과를 선택하기로 결정했어요.

  He decided to choose the German Literature department.

  Here, '독문학과를' acts as the object of the decision to select, indicating a choice made.