Chapter 11: Problem 13

A program creates 10 instances of the coin class. How many exist in memory?

Short Answer

Expert verified

Answer: 10 instances exist in memory after creating 10 instances of the coin class.

Step by step solution

Understanding class instances and memory storage

When a new instance of a class is created, that instance is stored in an area of the computer's memory. Each instance has its own memory address, and all instances of the same class are stored independently. So when 10 instances of the coin class are created, each of these instances has its own unique memory address, and they all exist in the memory.

Define what "exist in memory" means

To say that an instance "exists in memory" means that the computer has allocated memory for that instance and is holding its data (e.g., its properties and methods) in memory. Typically, as long as a variable reference or pointer points to the memory location of the instance, it is considered to be existing in memory. Once all references to an instance are removed, the instance may be subject to garbage collection (depending on the programming language), which means its memory may be reclaimed by the system.

Determine the number of instances existing in memory

Since the program creates 10 instances of the coin class, and each instance is stored independently in memory, the answer is that 10 instances of the coin class exist in memory after creating 10 instances.

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Computer Science Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

A program creates 10 instances of the coin class. How many exist in memory?

Short Answer

Step by step solution

Understanding class instances and memory storage

Define what "exist in memory" means

Determine the number of instances existing in memory

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Computer Science Textbooks

Computer Programming

Data Structures

Algorithms in Computer Science

Computer Network

Game Design in Computer Science

Functional Programming

Study anywhere. Anytime. Across all devices.