In the Following Search Function for a Linked List Using

question 21

Multiple Choice

In the following search function for a linked list using the Node and NodePtr as defined in the text) , why is there code to check if here is NULL?
NodePtr searchNodePtr head, int target)
{
NodePtr here = head;
Ifhere == NULL)
{
Return NULL;
}
Else
{
While here->data != target && here->link != NULL)
{
Here = here->link;
}
Ifhere->data == target)
{
Return here;
}
Else
{
Return NULL;
}
}
}

• A) the list may be empty
• B) the list may be full
• C) there is no reason for that code to be there
• D) A and B

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Definitions:

Effectiveness Lag

The delay between the time a policy measure is implemented and the time the measure has its intended effect on the economy.

Activity Lag

The delay between the time a particular economic policy is enacted and the time when its full effects are observed in the economy.

Passive Policy

An economic policy approach that involves minimal intervention by the government in the economy, allowing market forces to operate without active guidance or stimulus.

Short-run Aggregate Supply

The total production of goods and services in an economy at various price levels in a short-term period, before all production factors can be varied.