APCSA MCQPacket Unit 7-10

Front

Consider the following code segment. What is printed as a result of executing the code segment? Options: , , , , Nothing is printed because the first print statement will cause an error.

Back

Front

Refer to the static method removeNegs shown below. For which of the following lists will the method not work as intended? 6 -1 -2 5, -1 2 -3 4, 2 4 6 8, -3, 1 2 3 -8

Back

6 -1 -2 5

Front

Consider a sorted array arr of n elements, where n is large and n is even. Under which conditions will a linear search of arr be faster than a binary search? I. The target is not in the list. II. The target is in the first position of the list. III. The target is in arr [l + n/2]

Back

II only

Front

Let list be an ArrayList<String> containing only these elements: “Alex”, “Emma”, “John”, “Luis”. Which of the following statements will cause an error to occur? I. list.set(2, “6”); II. list.add(4, “Steven”); III. String s = list.get(4);

Back

III only

Front

Consider a Monster class that has a default constructor. Suppose a list ArrayList<Monster> minions is initialized. Which of the following will not cause an IndexOutOfBoundsException to be thrown?
Options:
for(int i = 0; i <= minions.size(); i++) minions.set(i, new Monster());
minions.add(minions.size(), new Monster());
Monster m = minions.get(minions.size());
Monster m = minions.remove(minions.size());
minions.add(-1, new Monster());

Back

minions.add(minions.size(), new Monster());

Front

A sorted list of 200 integers is to be searched to determine whether the value of 150 is in the list. What is the most efficient sorting algorithm to use in this case and what is the maximum number of elements that would be examined?

Back

Binary Search, 8 times

Front

What element will be contained in nums[2] after executing the shuffle algorithm on the array nums = 8, 7, 6, 5, 4 with rand values 3, 2, 0, 0?

Back

8

Front

Which of the following is printed as a result of executing the following statement? System.out.println(mystery(6)); Options: [3, 4, 7, 12, 19, 28], [3, 4, 7, 12, 19, 28, 39], [4, 7, 12, 19, 28, 39], [39, 28, 19, 12, 7, 4], [39, 28, 19, 12, 7, 4, 3]

Back

[3, 4, 7, 12, 19, 28, 39]

Front

Consider these declarations: Which statement will cause an error? Options: stringList.add(space);, stringList.add("Computer");, stringList.add("myInt");, stringList.add(space + 8);, stringList.add(myInt + 8);

Back

stringList.add(myInt + 8);

Front

Declare and construct an ArrayList that holds integers and has the reference name numbers.

Back

ArrayList numbers = new ArrayList();