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Step One :Java Programming: Build a Recommendation System (Java Programming and Software Engineering Fundamentals Specialization) Answers 2025

1. Correct uses of toString for Movie m

✔️ System.out.println(m);
✔️ System.out.println(m.toString());

❌ System.out.println(toString());
❌ System.out.println(m.toString);


2. Number of Comedy movies in ratedmoviesfull.csv

✔️ 1159


3. Number of movies longer than 150 minutes

✔️ 132


4. Maximum number of films by one director

✔️ 36


5. Director who directed the most films

✔️ Woody Allen

❌ Scorsese
❌ Spielberg
❌ Ridley Scott
❌ Hitchcock


6. Number of ratings by rater ID 193

✔️ 69


7. Maximum number of ratings by any rater

✔️ 206


8. Rater(s) with the most ratings

✔️ Rater ID 104


9. Number of ratings for movie ID “1798709”

✔️ 11


10. Total number of unique movies rated

✔️ 914


📌 Summary Table

Q# Final Answer
1 m and m.toString()
2 1159
3 132
4 36
5 Woody Allen
6 69
7 206
8 104
9 11
10 914