IST Final Exam Comprehensive Study Guide Notes

Communication and Writing in IT

• In IT, technical skills alone are insufficient; clear communication to teammates, managers, and clients is essential.

• Writing skills are needed for creating:

  • Manuals

  • Reports

  • Emails

• Importance of clarity in communication

• Examples of tech misunderstandings due to poor writing

CSS in HTML

• CSS is used by developers to style web pages.

• The tag in HTML facilitates linking to an external CSS file.

• Correct syntax for linking files

• Difference between inline, internal, and external CSS

SDLC (Software Development Life Cycle)

• SDLC represents a structured approach to software development.

• Phases of SDLC:

  • Planning

  • Designing

  • Coding

  • Testing

  • Deploying

  • Maintaining

• Explanation of why each phase matters

• Description of actions during testing and maintenance

IT Certification

• Certifications from CompTIA, Cisco, or Microsoft demonstrate specialization and commitment to growth to employers.

• Identification of valuable certifications

• Explanation of how certifications impact career opportunities

Computing Device / Network / System

• A computing device executes programs (e.g., phone, PC).

• A network connects multiple devices.

• A system comprises multiple devices working in conjunction.

• Examples of each (device, network, system)

• Explanation of why networks matter for communication

IP Address

• An IP Address serves as a unique identifier, a number assigned to each device online, facilitating data sending and receiving.

• Analogy: resembles a mailing address for the Internet.

• IPv4 vs. IPv6

• Explanation of why devices require unique IPs

Digital Footprint

• A digital footprint consists of the trace left by online activities, including searches, posts, and purchases.

• Companies may track and utilize this data.

• Guidance on how to manage your online footprint

• Consequences of poor digital habits

Scratch Programming

• Scratch is known as beginner-friendly, utilizing blocks such as 'repeat' or 'broadcast' to construct actions.

• Projects are saved as .sb3 files.

• Common Scratch blocks and their uses

• Instructions on how to build interactive animations

Career Use of Computers

• Virtually every career now depends on computers for tasks like:

  • Scheduling

  • Communication

  • Calculating

  • Designing

• Career examples using Excel, Google Docs

• Differentiating between jobs that are tech-heavy vs. tech-light

Binary Numbers

• Computers use binary numbers $1$s and $0$s (on/off) to process all information.

• Understanding the conversion between binary and decimal is essential

• Binary addition

• Powers of 2 for conversion ( relate to computing concepts)

Internet Protocols

• IP (Internet Protocol): Assigns addresses to devices.

• TCP (Transmission Control Protocol): Verifies that all data arrives complete and intact.

• UDP (User Datagram Protocol): Sends data without verification.

• DNS (Domain Name System): Resolves website addresses (e.g., Google.com).

• Packets: Data is divided into small chunks for transmission.

Digital Citizenship

• Digital citizenship involves practicing safe, ethical, and respectful online behavior.

• Includes:

  • Avoiding spam

  • Protecting personal data

  • Acting responsibly

• Dangers of cyberbullying

• Importance of strong passwords and safe browsing

How Internet Sends Data

• Data is transmitted in packets, not a continuous stream.

• Packets may arrive out of order and are reassembled at the destination.

• Rationale for data splitting

• Packet switching vs. circuit switching

Bits and Bytes

• $8$ bits = $1$ byte

• Bits are the smallest unit of data.

• Bytes store characters, such as letters or symbols.

Binary Addition

• Binary addition is performed similarly to decimal addition but uses base $2$.

• Example: $1111 + 1011 = 11010$ (which is $26$ in decimal).

Flowchart Symbols

• Oval: Indicates Start/End.

• Diamond: Represents a Decision.

• Square: Signifies a Process.

• Flowcharts aid in visualizing a process or logic.

Web Browser

• A browser (e.g., Chrome) enables users to view websites.

• It interprets HTML, CSS, and JavaScript.

Protocol

• A protocol is a set of rules that computers adhere to for communication.

• Examples:

  • HTTP for websites

  • FTP for file sharing

Game Creation in Scratch

• Involves:

  • Logic

  • Algorithms

  • Bug fixing

• Encompasses:

  • Planning

  • Coding

  • Testing

  • Revising

ISPs

• ISPs (Internet Service Providers) such as Verizon or AT&T provide connections to the internet.

• Google is not an ISP.

AI & Chatbots

• Chatbots utilize AI to:

  • Answer questions

  • Simulate conversations

  • Provide customer support

Sensing Blocks

• The Sensing tab in Scratch enables sprites to respond to interactions, such as touching another sprite or a mouse click.

Binary to Decimal Conversion

• Example: Binary $10101010$ = Decimal $170$.

• Each digit represents a power of $2$.

Image Tag Attributes

• Utilize the alt attribute in <img> tags to describe the image.

• Important for accessibility.

Digital Divide

• Unequal access to technology exists.

• Some communities lack reliable internet or computer access.

Computing System

• Computing System has multiple devices connected and working together (e.g., your phone, smartwatch, and cloud storage).

Algorithms

• Algorithms solve problems using:

  • Sequence

  • Selection

  • Iteration

• Examples:

  • A recipe

  • Google Maps

C.R.A.P. Design

• C.R.A.P. = Contrast, Repetition, Alignment, Proximity

• Principles enhance website usability and comprehension.

IT Career Outlook

• IT job market is growing due to new technologies and increased digital dependence.

Personal Branding

• Your online presence is important.

• Maintain professionalism, cultivate a portfolio, and foster respectful communication.

Internet in Business

• The internet facilitates:

  • Remote work

  • Online meetings

  • Global collaboration

Flowchart Diamond

• The diamond symbol represents decisions, depicted as yes/no questions in a process.

International Business Etiquette

• Cultural habits matter.

• In Russia, tardiness may test patience in business.

Ethics & Prosthetics

• Videos like Eyeborg raise questions on how far tech should go in enhancing human ability.