Chapter 7 – study questions 1-10, Exercise 2 ( from Informa…
Chapter 7 – study questions 1-10, Exercise 2 ( from Information Systems for Business and Beyond textbook) Chapter 8- study questions 1-10, Exercise 2 ( from Information Systems for Business and Beyond textbook) The above assignments should be submitted in a single word document.
Answer
Chapter 7 study questions 1-10
1. What is the purpose of a database?
A database is designed to organize and store large amounts of data in a structured manner. It allows for efficient storage, retrieval, and manipulation of data, ensuring data integrity and minimizing redundancy.
2. What is a relational database?
A relational database is a type of database that organizes and maintains data in tables, with each table representing a different entity or concept. The tables are connected through relationships based on common attributes, allowing for efficient retrieval of related data.
3. What is a primary key?
A primary key is a unique identifier for each record in a table. It is used to ensure data integrity and provide a way to uniquely identify a record within a table. No two records can have the same primary key value.
4. What is normalization?
Normalization is the process of organizing data in a database in a way that minimizes redundancy and maximizes efficiency. It involves breaking down data into smaller, more manageable tables, eliminating data duplication, and ensuring data dependencies are properly represented.
5. What is the purpose of a query in a database?
A query is used to retrieve and manipulate data from a database. It allows users to specify the criteria for selecting specific records or data elements and perform calculations or other operations on the data.
6. What is an entity-relationship diagram?
An entity-relationship diagram (ER diagram) is a visual representation of the structure and relationships of entities in a database. It uses various symbols and connectors to illustrate the relationships between entities, such as one-to-one, one-to-many, or many-to-many.
7. What is a foreign key?
A foreign key is a field in a table that refers to the primary key of another table. It establishes a relationship between the two tables, allowing for the enforcement of referential integrity and enabling data retrieval from multiple related tables.
8. What is a join operation in a database?
A join operation combines records from two or more tables based on a related attribute or field. It allows for the retrieval of data that is spread across multiple tables, enabling more complex queries and analysis.
9. What is data mining?
Data mining is the process of discovering patterns, relationships, or insights from large datasets. It involves applying various statistical and mathematical techniques to uncover hidden patterns or trends in the data, which can be used for decision-making or predictive analysis.
10. What is the role of a database administrator?
A database administrator is responsible for managing and maintaining a database system. Their roles include database design, security management, performance optimization, backup and recovery, and resolving any issues or problems that may arise with the database system.
Chapter 8 study questions 1-10
1. What is a computer network?
A computer network is a collection of interconnected devices, such as computers, servers, routers, and switches, that are linked together to facilitate the exchange of data and resources.
2. What are the advantages of using a computer network?
Using a computer network offers several advantages, including:
– resource sharing: multiple users can access and share data, software, and hardware resources.
– communication: users can communicate and collaborate with each other easily through email, instant messaging, and video conferencing.
– centralization: data and resources can be centrally managed and controlled, improving efficiency and security.
– cost savings: by sharing resources and infrastructure, organizations can reduce costs associated with hardware, software, and maintenance.
3. What are the different types of computer networks?
There are several types of computer networks, including:
– Local Area Network (LAN): a network that covers a small geographical area, such as an office building or a campus.
– Wide Area Network (WAN): a network that covers a larger geographical area, often connecting multiple LANs across different locations.
– Metropolitan Area Network (MAN): a network that covers a city or metropolitan area, providing high-speed connectivity for businesses and organizations.
– Personal Area Network (PAN): a network that connects devices in close proximity to an individual, such as Bluetooth devices or wearable devices.
– Wireless Local Area Network (WLAN): a LAN that uses wireless technology, such as Wi-Fi, to connect devices without the need for physical cables.
4. What is a protocol in a computer network?
A protocol is a set of rules and procedures that govern the communication between devices in a computer network. It defines how devices should format, transmit, and receive data, ensuring compatibility and reliable communication.
5. What is the role of an IP address in a computer network?
An IP address is a unique numerical identifier assigned to each device in a network. It enables devices to communicate with each other by providing a way to identify and locate network resources.
6. What is the difference between IPv4 and IPv6?
IPv4 and IPv6 are two different versions of the Internet Protocol, used to assign IP addresses. IPv4 uses a 32-bit address format, allowing for approximately 4.3 billion unique addresses. IPv6 uses a 128-bit address format, providing a significantly larger number of unique addresses (approximately 340 undecillion).
7. What is the purpose of a router in a computer network?
A router is a network device that forwards data packets between different networks. It determines the optimal path for data transmission based on network conditions, such as available bandwidth and congestion, ensuring efficient and reliable data transfer.
8. What is a firewall?
A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks, protecting against unauthorized access and potential threats.
9. What is a virtual private network (VPN)?
A virtual private network (VPN) is a secure connection established over a public network, such as the internet. It allows users to access a private network remotely, encrypting the data transmitted between the user’s device and the network to ensure privacy and security.
10. What is cloud computing?
Cloud computing refers to the delivery of computing services, such as storage, processing power, and software applications, over the internet. It enables users to access and use these services on-demand, without the need for local hardware or infrastructure, providing flexibility and scalability.