9-class-Computer-notes

 Introduction

       Many students are interested in learning computer skills. Few students don’t have any interest in learning computer skills because they think it is a challenging subject. The students which are interested in programming and its various skills can get help with our computer 9 class notes Punjab board. In our computer 9 class notes, all the necessary knowledge is there. It is given in an easy language you can better understand from the notes. You will find Biology 9 class notes in our site.

Computer 9 Class Notes Punjab Board

Chapter 1: Problem-Solving

    Outcomes of learning this chapter of computer 9 class notes , you will be defining a problem, understanding a problem, planning a solution, defining a candid solution, and selecting the best solution. The second step is defining a flowchart, explaining the flowchart for solving the problem, understanding the requirement of the flowchart, using flowchart symbols, and drawing the flowchart for sample problems.

    We are explaining an algorithm in computer 9 class notes. Discusses the role of the algorithm in the problem, formulating the algorithm, understanding the efficiency of the algorithm, and differentiating the algorithm and flowchart.

      You can describe the concept of the test, the importance of testing, and understanding the types of test cases. Also understanding the concept of verification, and understanding the concept of validation. You can also do identification and correction of errors.

Chapter 2: Binary System

    In this chapter, you will define the number system. There are three types of number systems e.g, binary, decimal, and hexadecimal. You can explain the conversion of decimal and hexadecimal, the conversion of binary and decimal, and the conversion of binary and hexadecimal.

     Also, discuss memory and data storage, and differentiate between storage devices and memory. Explain components that measure the size of computer memory. You can also define in computer 9 class notes the laws of boolean algebra, logical expressions, truth tables, truth values, logical operators, and boolean propositions.

Chapter 3: Networks

    You will be able to explain in computer 9 class notes, computer networks, the physical structure of networks, the need for an establishing computer network, and also explain client and server. You can define all the components of a communication system like sender, receiver, message, protocol, and transmission medium. 

     You can explain network modules e.g TCP/IP and their functions and layers. You will be able to understand why messages need to hold address information. Also, explain the importance of addressing the postal service and addressing of telephone.

     You can understand the request/response procedure of the internet, and IP addresses. There are some protocols like FTP, HTTP, and SMTP. You can explain the functions of a router and the routing process.  

Chapter 4: Data and Privacy

     You can understand in computer 9 class notes, ethical issues related to security and it is their responsibility to secure the privacy of others. Define the privacy concerns that arise through mass data collection. Explain personal security and privacy concern that arises with the use of the computational system.

     You will understand encryption is an important need of daily life in the internet world. Using the caesar cipher widget to crack a message encrypted by caesar cipher and also using frequency analysis to crack a message encrypted with random substitution. Explain the security flaws and weaknesses of substitution ciphers.

      You can define the relationship between passwords and cryptographic keys, in the broader sense what makes a key complicated to crack. Use a tool that shows password strength, and reasons about weak vs strong passwords.

Chapter 5: Designing Website

    You will be able to define a hypertext markup language, in this process steps are included to create and save an HTML file also display a webpage. You can define the elements like HTML, Head section, and Body section. Explain the following steps:

  • Create a page title.
  • Write a paragraph
  • Insert links
  • Headings/ subheadings
  • Create spaces
  • Use according to the text formatting tags
  1. Font color
  2. Bold text
  3. Font size
  4. Italic text
  5. Font face
  6. Underline text

Differentiate among the following lists:

  • Nested list
  • Ordered list
  • Definition list
  • Unordered list

You can explain images and background:

  1. Add an image
  2. Apply border to the image

Explain:

  • Height of the image
  • Width of the image
  • Apply an alternate text to the image
  • Also, apply foreground and background colors to the webpage.

    You will be able to define in computer 9 class notes, hyperlinks, set a hypertext link to the website, set an anchorage, make an anchor to a hypertext link inside a webpage, and also set a graphic hypertext link. You can create a table on the webpage, and apply the attributes like border, colspan, and rowspan.

Advantages

  • The computer is an in-demand skill in every industry.
  • Computer subject helps us with problem-solving skill.
  • The computer field offers high-paying jobs.
  • Mostly computer-related jobs offer to work remotely.

Disadvantages

  • Cyber security concerns are involved such as hacking, data breaches, and identity theft.
  • Spending long hours in front of a computer screen causes health issues.

Conclusion

    We have provided all notes according to your Punjab board syllabus. You can get all the computer-related material from our site. All 9 class computer notes are according to the new syllabus. You can download free of cost from Freeilmi.