Explanations: - There are 4 questions in the exam. All questions have equal weight. - The duration is 60 minutes. - Use your time efficiently as you must upload your files within 60 minutes. You won't have extra time. - Students should answer the questions on an A4 paper by their hand-writing take photos of their papers by putting the student iD card on it and upload them to uzem, within 60 minutes. - Student name-surname, student ID number, signature and student iD card should be on the paper readably. Questions: 1. Explain inheritance and interface in object oriented programming language. 2. Explain encapsulation and message object in oriented programming language. 3. Write a java program that finds the average of a one dimension array. 4. By giving an example explain the scope of variable in object oriented programming language