What is the name of the punctuation mark '!'?

Which of the following is an example of a qualitative adjective?

Which Karak (case) is used in the word 'अरे!'?

Passage: In student life, one is strongly drawn toward friendship. Friendship wells up from the heart. In the bonds of affection formed later, neither the same enthusiasm nor the same sadness remains. Where else is the mind-pleasing joy found in childhood friendship? What sweetness and attachment there are, and what mutual trust! So many emotions arise from the heart. The present appears delightful, and the mind holds attractive imaginations about the future. How quickly tales are carried and how quickly one has to accept or reconcile. Question: From where does friendship well up?

Passage: In student life, one is strongly drawn toward friendship. Friendship wells up from the heart. In the bonds of affection formed later, neither the same enthusiasm nor the same sadness remains. Where else is the mind-pleasing joy found in childhood friendship? What sweetness and attachment there are, and what mutual trust! So many emotions arise from the heart. The present appears delightful, and the mind holds attractive imaginations about the future. How quickly tales are carried and how quickly one has to accept or reconcile. Question: What is the antonym of the underlined word 'अनुरक्ति'?