My Score
MCQ 2015 Corrections
Question 10
For this question, you were supposed to identify which of the given options is NOT a valid declaration considering the provided interface and class declarations. I chose Option C, believing it was incorrect. My mistake was not understanding that a variable of a superclass type can reference an object of the subclass; in this case, TennisPlayer is a subclass of Athlete. The correct answer is Option D because a variable of type Student cannot reference an object of type Athlete as they are not directly related in the hierarchy. This is why the correct answer is Option D.
Question 18
For this question, you were supposed to determine the output of the given statement System.out.println(404 / 10 * 10 + 1);. I chose Option E, believing it was correct but unfortunately, I was wrong. I thought Option E was correct because I assumed it involved floating point division and casting to an int as in (int)(404.0 / 10 * 10 + 1). However, the operation involved integer division. The correct answer is Option D (401), as it accurately represents the result of integer division followed by multiplication and addition. This is why the correct answer is Option D.
Question 31
For this question, I was supposed to determine the state of the board after executing a given code segment. I chose Option A, thinking it was correct but unfortunately, I was wrong. I made this choice because I misunderstood how the loops and conditions within the code were functioning together. The correct answer is Option E as it requires loops across the entire board with alternating checks for when rows and columns are even or odd. This is why the correct answer is Option E.
My work
DISCLAIMER: Not the most up-to-date picture because I changed some answers and lost the paper. 😭😭
MCQ 2015 Reflection
I performed well on this quiz, scoring 36 out of 39. The three mistakes I made were due to misunderstandings in class hierarchy, integer division, and loop functionality in code. These are areas I will focus on to improve my understanding and performance for future quizzes.