Operating Systems Overview

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What is the primary function of an operating system?

To manage files and folders on the computer's storage devices

To provide a user interface for interacting with the computer

To manage hardware resources and provide a platform for running applications (correct)

To ensure security and prevent unauthorized access to the computer

What is the difference between a native application and a web application?

Native applications are designed to run on a specific operating system, while web applications are platform-independent

Native applications are more secure than web applications because they are not exposed to the internet

Native applications are installed on the computer, while web applications are accessed through a web browser (correct)

Native applications have access to all of the computer's hardware resources, while web applications are restricted to what the browser can access

Which of the following is not a major operating system for client computers?

Symbian (correct)

Unix

Microsoft Windows

macOS

What is the primary purpose of virtualization in a computing environment?

To allow multiple operating systems to run on a single physical computer Signup and view all the answers

Which of the following is a constraint associated with operating systems?

Operating systems can only be used on a single type of hardware Signup and view all the answers

Which of the following is an example of a server operating system?

Windows Server Signup and view all the answers

What is the primary purpose of an Entity Relationship Diagram (ERD)?

To identify and understand the data requirements from a business perspective Signup and view all the answers

How are entities in an ERD converted to a database design?

Entities become database tables, and entity attributes become table columns Signup and view all the answers

What is the purpose of an intermediary table in a database design?

To represent a many-to-many relationship between two entities Signup and view all the answers

What is the key difference between an ERD and a database design?

ERDs allow for many-to-many relationships, while database designs do not Signup and view all the answers

How are the primary keys of an intermediary table related to the foreign keys?

The primary keys of the intermediary table are always composite, made up of the foreign keys Signup and view all the answers

What is the purpose of adding enriched data fields to an intermediary table in a database design?

To provide additional context and meaning to the many-to-many relationship Signup and view all the answers

Which of the following is NOT a function of an Internet Service Provider (ISP)?

Maintaining and updating the software on the client's devices Signup and view all the answers

Which of the following statements about Digital Subscriber Line (DSL) is true?

It operates on the same lines as voice telephone lines without interference Signup and view all the answers

In the context of Software as a Service (SaaS) at EHermes, which of the following is NOT a responsibility of the SaaS vendor?

Transferring existing data from EHermes to the cloud Signup and view all the answers

What type of network does an iPhone typically use when a LAN-based network is not available?

WAN wireless network Signup and view all the answers

What is the primary advantage of using a Software as a Service (SaaS) model, as mentioned in the text?

Reduced investment in hardware and software system components Signup and view all the answers

Which of the following is an example of a Wide Area Network (WAN)?

The Internet, connecting networks across the globe Signup and view all the answers

What is the primary difference between a web application and a native application?

Web applications are designed to run within a web browser, while native applications are written using professional programming languages and run on a specific operating system. Signup and view all the answers

What is the primary function of a router in a network?

To analyze incoming network packets and forward them to the appropriate destination network. Signup and view all the answers

What is the purpose of the Transmission Control Protocol (TCP) in network communication?

To ensure the reliable delivery of data packets over the internet. Signup and view all the answers

What is the primary function of a Uniform Resource Locator (URL)?

To provide a unique address for a resource on the internet, such as a website or web page. Signup and view all the answers

What is the primary purpose of the Extensible Markup Language (XML)?

To transmit structured documents over the internet. Signup and view all the answers

What is the difference between an IPv4 and an IPv6 address?

IPv4 addresses are shorter and have a limited number of available addresses, while IPv6 addresses are longer and have a much larger address space. Signup and view all the answers

What is the primary purpose of a foreign key in a relational database?

To link data between two or more tables Signup and view all the answers

Which of the following is a characteristic of a good primary key?

It should be a field that uniquely identifies each row in a table Signup and view all the answers

In the context of a relational database, what is the purpose of an ERD (Entity Relationship Diagram)?

To define the structure and relationships between database tables Signup and view all the answers

Which of the following statements about BPMN (Business Process Model and Notation) is true?

It is a graphical representation standard for specifying business processes Signup and view all the answers

In a database table, what is the difference between a row and a field?

A row represents a single unit of data, while a field represents a characteristic or property of data Signup and view all the answers

Which of the following is NOT a good example of a primary key field?

A person's first and last name Signup and view all the answers