Consider the AddFirst Method of the LinkedList Class in Chapter

question 41

Multiple Choice

Consider the addFirst method of the LinkedList class in Chapter 16: /**
Adds an element to the front of the linked list.
@param element the element to add
*/
Public void addFirst(Object element)
{
Node newNode = new Node() ;
NewNode.data = element;
NewNode.next = first;
First = newNode;
}
Three implementations have been proposed to make the addFirst method thread safe where listLock is a variable of type ReentrantLock. Which of them will work?
I.
ListLock.lock() ;
Try
{
Node newNode = new Node() ;
NewNode.data = element;
NewNode.next = first;
}
Finally
{
ListLock.unlock() ;
}
First = newNode;
II.
Node newNode = new Node() ;
NewNode.data = element;
NewNode.next = first;
ListLock.lock() ;
Try
{
First = newNode;
}
Finally
{
ListLock.unlock() ;
}
III.
ListLock.lock() ;
Try
{
Node newNode = new Node() ;
NewNode.data = element;
NewNode.next = first;
First = newNode;
}
Finally
{
ListLock.unlock() ;
}

• A) None of them
• B) III only
• C) II and III only
• D) All of them

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Definitions:

Generations

Groups of people born and living around the same time, often considered to have shared experiences, values, and traits.

Grief Reactions

Emotional and psychological responses that occur after the loss of a loved one or the experience of significant loss, varying greatly among individuals.

Bereaved Spouses

Individuals who have lost their husband or wife, experiencing the process of grieving and mourning.

Resilient Pattern

The ability of an individual or system to adapt and recover from adversity, trauma, tragedy, threats, or significant sources of stress.