Standard Operations & Algorithms
Help Questions
AP Computer Science A › Standard Operations & Algorithms
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Only I
I , II, and III
Only III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.
public static int[] doWork(int[] arr, int val,int index) {
int[] ret = new int[arr.length + 1];
for(int i = 0; i < index; i++) {
ret[i] = arr[i];
}
ret[index] = val;
for(int i = index + 1; i < ret.length; i++) {
ret[i] = arr[i - 1];
}
return ret;
}
Which of the following is a possible error in the first loop in code above?
I. The array arr might be indexed out of bounds.
II. The array ret might be indexed out of bounds.
III. A null pointer exception might occur.
Both I and III
Both I and III
Only I
Only I
I , II, and III
I , II, and III
Only III
Only III
Both II and III
Both II and III
Explanation
The most obvious possible error is that the array arr might be a null value. You need to check for these kinds of values before using the variables. (If you do arr[0] on a null value, an exception will be thrown.) In addition, it is possible that a value for index might be given that is too large. Consider if index = 100 but arr is only 4 elements long. Then, you will have ret be a 5 value array. When the first loop starts to run, you will go all the way to 99 (or at least attempt to do so) for the index value i_; h_owever, once you get to ret[4] = arr[4], there will be an out of bounds error on arr, which only has indices 0, 1, 2, and 3. Of course, there could be other problems later on with ret, but the question only asks about this first loop.