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DSA 1 Quiz 2 Retake Questions and Answers Graded A+
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Exam of 7 pages for the course DSA at DSA (DSA 1 Quiz 2 Retake)
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DSA 1 Quiz 2 RetakeA class defined as abstract must also have abstract methods - answerfalse
Insertion sort is an example of an Abstract Data Type - answerfalse
The Java Collections Framework contains both interfaces and abstract classes. What is
the main difference between these two things?
I. Interfaces are one way Java uses to implement multiple inheritance.
II. Abstract classes describe what something is. Interfaces describe what something can
do.
III. A class can only inherit from one superclass but can implement many different
interfaces - answerI, II, and III
The Comparator interface requires that one method be implemented to allow total
ordering of a collection: sort() - answerFalse
Both .equals() and .compare() are methods inherited from the super class Object -
answerFalse
Suppose we have a vector whose initial capacity is 7 (and initial size 0). Also suppose
that this vector doubles in size any time we try to insert an element that no longer has
space to be inserted. If we start with a size of 0 and insert 25 elements, how many times
will the vector resize? - answer2
Which of the following statements about vectors is not true - answerUnlike insert,
removing from the front of the vector is very fast, because we don't need to shift
elements
Which of the following statements will compile without errors?
I. List<String> myList = new vector<String>();
II. List<Integer> myList2 = new ArrayList < >();
III. Vector<Double> myList3 = new List<Double>();
IV. List<Double> myList4 = New Vector<Integer>(); - answerI and II
If you remove an element from an ArrayList object, the capacity automatically
decreases - answerfalse
Assume a singly linked list implemented using a Node class with two fields data (int)
and nextNode (node). A List class holds the field head (first node in the list). The linked
list contains six nodes holding 20, 11, 13, 19, 12, 14 in that order. What is the result to
the linked list of the following instructions?
, Node newNode = new Node();
newNode.data = 99;
newNode.nextNode = head.nextNode.nextNode;
head.nextNode.nextNode = newNoe - answerThe value 99 is inserted into the linked list
after 13 and before 19???
Assume a singly linked list implemented using a Node class with two fields data (int)
and nextNode (node). A List class holds the field head (first node in the list).
What is the value of nextNode in the last node of the list? - answernull
consider the following code:
public class ListNode {
public int data;
public ListNode next;
}
public class List{
// method of list class
public void Strip(ListNode p){
// precondition: p references the first node of a nonempty list
while(p!=null){
while((p.next!=null)**(p.next.data == p.data))
p.next = p.next.next;
p = p.next
}
}
}
Suppose that L represents the following list:
..... - answerJust know its like 5 2 1 I think
Assume a singly linked list implemented using a Node class with two fields data (int)
and nextNode (node). A List class holds the field head (first node in the list). The linked
list contains six nodes holding 20, 11, 13, 19, 12, 14 in that order. What will the
statement head.nextNode.nextNode.nextNode = null; accomplish? - answerIt will result
in the list ending after 19
Assume a singly linked list implemented using a Node class with two fields data (int)
and nextNode (node). A List class holds the field head (first node in the list). The linked
list contains six nodes holding 20, 11, 13, 19, 12, 14 in that order. What will be returned
by return head.nextNode.nextNode.nextNode.data? - answer19
When a list is copied to a stack (front to back of list) then the stack is copied back to
another list (using insertAtFront()), how do the two lists' orders compare? - answerThey
are the same order because of the insertAtFront()
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