A Queue Based on a Linked List Uses the Following

question 11

Multiple Choice

A queue based on a linked list uses the following code
Class Node{
String element;
Node next;
Node (String el,Node n) {
Element = el;
Next = n;
}
}
Node front = null,rear = null;
What is the right code for the boolean empty() method?

• A) return front == null;
• B) if (rear == front.return true;
• Else
• Return false;
• C) if (front == null.
• Throw new RuntimeException("Empty".;
• Else
• Return false;
• Return true;
• D) return front == rear;

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Definitions:

Variable Costs

Expenses that fluctuate directly with the volume of production or sales, such as raw materials and direct labor costs.

Fixed Costs

Constant expenditures that do not change with the volume of production or sales, such as rent or salaries.

Contribution Margin Ratio

A measure expressing how a product's selling price exceeds variable costs, shown as a percentage of the sales price.

Fixed Expenses

Costs that do not vary with the volume of production or sales, such as rent, salaries, and insurance.