Module 3: The AWS Cloud
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In this post, I provide complete, accurate, and detailed explanations for the answers to Module 3: The AWS Cloud of Course 1: Introduction to Information Technology and AWS Cloud
Whether you’re preparing for quizzes or brushing up on your knowledge, these insights will help you master the concepts effectively. Let’s dive into the correct answers and detailed explanations for each question!
Knowledge check
Practice Assignment
1. Which cloud computing model involves the management of applications by the cloud service provider?
- Infrastructure as a service (IaaS)
- Platform as a service (PaaS)
- Software as a service (SaaS) ✅
- Desktop as a service (DaaS)
Explanation:
In the SaaS model, the cloud service provider manages everything, including applications, runtime, data, middleware, OS, virtualization, servers, storage, and networking. Users simply access the software over the internet without worrying about infrastructure or platform management.
Module 3 Assessment
Graded Assignment
2. Which statement accurately describes a common use of JavaScript in web development?
- JavaScript is mainly used for defining the visual layout and styling of webpages.
- JavaScript is commonly used for creating interactive and dynamic elements on webpages. ✅
- JavaScript is exclusively used for server administration tasks, such as managing network security and user access control.
- JavaScript is commonly used for the creation and management of web servers.
Explanation:
JavaScript is a scripting language that adds behavior to web pages. It enables features like dropdown menus, sliders, form validation, pop-ups, and animations—all of which enhance user interaction.
3. What is the primary function of the Domain Name System (DNS)?
- DNS resolves domain names to IP addresses. ✅
- DNS manages network connections.
- DNS dynamically assigns IP addresses, given a domain name.
- DNS protects against cyber threats for domains.
Explanation:
The Domain Name System (DNS) acts like the internet’s phonebook. It translates human-readable domain names (like example.com) into IP addresses that computers use to identify each other.
4. What is the purpose of Hypertext Markup Language (HTML)?
- HTML is a programming language used to create interactive websites.
- HTML is used for designing the style and appearance of websites.
- HTML is responsible for processing and storing data that users enter on websites.
- HTML is used to create the content and structure of webpages. ✅
Explanation:
HTML (Hypertext Markup Language) defines the basic structure of web content—headings, paragraphs, links, images, etc. It’s not a programming language but a markup language.
5. What is the function of a central processing unit (CPU)?
- The CPU is responsible for executing instructions and performing calculations in a computer. ✅
- The CPU is responsible for managing the network connections in a computer.
- The CPU is responsible for storing data in the computer’s memory.
- The CPU is responsible for displaying graphics and images on the computer screen.
Explanation:
The CPU (Central Processing Unit), often called the “brain” of the computer, carries out all instructions from software and hardware, including logic, arithmetic, and control operations.
6. What is the purpose of Secure Sockets Layer (SSL)?
- SSL is a programming language that is used to build dynamic and interactive web applications.
- SSL is a hardware component that is installed in computer systems to enhance their performance.
- SSL is a protocol that is used for encrypting network traffic and ensuring secure communication over the internet. ✅
- SSL is a firewall system that protects computer networks from external threats and unauthorized access.
Explanation:
SSL (Secure Sockets Layer) encrypts data sent between browsers and servers, protecting sensitive information like login credentials and credit card details from being intercepted.
7. What is the purpose of Amazon Simple Storage Service (Amazon S3)?
- Amazon S3 is a cloud storage service for securely storing and retrieving data. ✅
- Amazon S3 is an email service that can be used to send and receive emails over the internet.
- Amazon S3 is a database service offered for managing and querying structured data.
- Amazon S3 is a virtual private network (VPN) service to provide secure, remote access to private networks.
Explanation:
Amazon S3 (Simple Storage Service) is an object storage service offered by AWS. It allows businesses and developers to store and retrieve any amount of data at any time, with high durability and availability.
8. What is the cloud?
- The cloud refers to the physical infrastructure that houses and supports computer servers and data-storage devices.
- The cloud represents a global network of interconnected computers and servers that facilitate data exchange and communication.
- The cloud refers to the on-demand delivery of IT resources over the internet with pay-as-you-go pricing. ✅
- The cloud represents a cybersecurity framework that protects data and systems from unauthorized access and cyber threats.
Explanation:
Cloud computing provides computing services (like storage, servers, and databases) over the internet instead of local servers or personal devices. It helps reduce costs and improve scalability.
9. What is the role of a server in computer networks?
- A server is a device that connects multiple networks together to enable communication between them.
- A server is a software application that can be used to access and browse the internet.
- A server is a security mechanism that protects computer networks from unauthorized access and cyber threats.
- A server is a computer or system that provides resources and services to other computers on the network. ✅
Explanation:
Servers host applications, store data, or manage access to resources. For example, a web server delivers websites to users, while a file server manages shared documents.
10. What is the purpose of a load balancer in computer networks?
- A load balancer is a device or software that distributes incoming network traffic across multiple servers to facilitate efficient resource utilization and high availability. ✅
- A load balancer is a security mechanism that filters and blocks malicious network traffic to protect servers from cyber threats.
- A load balancer is a protocol that is used to establish secure connections between client devices and servers on a network.
- A load balancer is a data storage device that maintains backups and redundant copies of critical server data.
Explanation:
Load balancers help prevent any one server from becoming overwhelmed, improving reliability and speed by balancing the workload evenly among multiple servers.
11. What is the pricing model of Amazon Web Services (AWS)?
- AWS follows a fixed, monthly-subscription pricing model, where users pay a fixed amount regardless of their resource consumption.
- AWS follows a pay-as-you-go pricing model, where users pay only for the resources and services they consume. ✅
- AWS follows a one-time-payment pricing model, where users pay a single upfront fee for unlimited access to AWS services.
- AWS follows a yearly fixed pricing model, where users pay a yearly fee to access AWS resources.
Explanation:
With AWS’s pricing model, you don’t pay upfront. Instead, you’re billed based on usage—such as computing power, storage, or data transfer—making it flexible and cost-efficient for all sizes of businesses.
Related contents:
Module 1: Foundational IT Knowledge
Module 2: IT and the Internet
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