DavidL0914
commented
1 week ago Score: 32/40 - Cross review with Joshua Thinh Missed question: 1.Misread question
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Integer Division in Java Results in Truncation: When dividing two integers in Java, the result is truncated, meaning only the whole number portion of the quotient is retained, and any fractional part is discarded. For example, 5 / 3 yields 1 because the remainder is ignored. To get a more accurate result, you can use typecasting to convert one or both integers to a double: double result = (double) 5 / 3; // Result: 1.666...
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Misread question
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Enhanced for Loop in 2D Arrays: When using an enhanced for loop with a 2D array, the loop variable iterates over the elements of the array rather than indices. For example, in for (int[] row : array), row will refer to each sub-array of the 2D array, not a specific row index. Similarly, in for (int val : row), val represents each element of that sub-array. Be mindful that you cannot directly access specific indices using enhanced loops without maintaining additional variables.
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.substring(x, y): The .substring(x, y) method in Java extracts a substring from index x (inclusive) to index y (exclusive). For example, "hello".substring(0, 2) results in "he". If x == y, the result is an empty string. Always ensure x and y are valid indices to avoid runtime errors.
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n is not initialized to 0, so we need answer.
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Keep track of infinite loops. k is never changed in the body of the while loop, it will always be 1 and less than 4, so it causes an infinite loop. For example: int k = 1;
while (k < 4) {
System.out.println("Infinite loop!");
// k is never updated, so the condition k < 4 is always true } -
Be careful of work
JoshThinh
Reviewing 2014 CB Practice Exam