• Mistakes and Corrections
  • Question 9
  • Question 13
  • Question 19
  • Question 22
  • Question 26
  • Question 34
  • Question 35
  • Question 40
  • Question 41
  • Question 42

Overall Reflection

I learnt many valuable skills while taking this College Board Practice MC Exam, including:

• Time management during the test (to not get stuck on any problem for too long)
• Code analysis in segments
• Drawing maps of loops and operations

On this MC, I earned a 32/42. My analytics are as follows:

After viewing my score, I checked the topic breakdowns to determine which big ideas I need to work on the most. My mistakes mainly centered in the class creation big idea, which is reflected in my topic breakdowns as well.

Mistakes and Corrections

Question 9

Selected: The variables feet and inches cannot be accessed from the method toInches.

Correct: The toInches method cannot be accessed from a class other than Measurement.

I got this question wrong because I did not understand what .

Question 13

Selected: 20

Correct: 25

I got this question wrong because while I correctly identified that the outer loop was run 5 times, I incorrectly thought that the inner loop ran 4 times.

Question 19

Selected: It generates a random integer between 10 and 16, inclusive, and assigns it to r.

Correct: It generates a random integer between 10 and 15, inclusive, and assigns it to r.

When I answered this question, I learned that Math.random only generates numbers between 0 and 1. However, I forgot to note that 1 is not inclusive, so 16 is not a possibility of this statement.

Question 22

Selected: The instance variables should be designated public instead of private.

Correct: The getInfo method does not have access to variables named pName or pSpecies.

I got this question wrong because I misunderstood the difference between private and public variables. That was not the issue here; the issue lay in the getInfo method instead.

Question 26

Selected: In line 3, changing the statement n /= 10 to n %= 10

Correct: In line 1, changing the condition n > 0 to n / 10 > 0

I got this question wrong because I did not realize that the answer choice I selected would lead to an infinite loop. I should slow down when answering operator questions.

Question 34

Selected:

for (int j = 0; j < oldList.size(); j++)
{
   newList.add(oldList.get(0));
   newList.add(oldList.get(j)); 
}

Correct:

for (String s : oldList)
{
   newList.add(s);
   newList.add(0, s); 
}

While I do understand how indexing in Java works, I seem to have forgotten during this question :(

Question 35

Selected: It returns true if numbers is sorted from least to greatest and returns false otherwise.

Correct: It returns true if numbers is sorted from greatest to least and returns false otherwise.

I got this question wrong because I did not read the answer choices carefully.

Question 40

Selected: [10, 30, 60, 20, 50, 40]

Correct: [10, 20, 30, 60, 50, 40]

I only calculated 2 iterations of the loop instead of 3 as the question asked.

Question 41

Selected: 3

Correct: 5

I assigned J to result as opposed to K, which caused the final index to be wrong.

Question 42

Selected:

int sum = 0;
for (int j = 0; j <= 5; j++)
{
   j++;
   sum += j;
}

Correct:

int sum = 0;
for (int j = 1; j <= 6; j++)
{
   sum += j;
}

I miscalculated the original sum, causing me to select the wrong answer.

Overall Reflection

I need to work on identifying where errors originate in code. Furthermore, many of my errors stemmed from simple mistakes and logical errors, which gives me confidence that if I take the test earlier in the day, I will be able to earn a higher score.