Posts

Chapter 4: Multimedia

-
Multimedia Multimedia is defined as the combination of contents. Example: Audio, Video, Image, Animation, and Graphics. Uses of multimedia Entertainment Music Education Marketing Virtual Reality Sales Presentation Computer-Based Training Image Quality   Image Quality is defined as a characteristic of an image that measures the perceived image degradation. Image quality is the integrated set of perception of the overall degree of excellence of an image. Factors that influence the image quality are sharpness, contrast, dynamic range, color accuracy, distortion, etc. Image File Format 1. GIF ( Graphics Interchange Format ) The most commonly used graphic file formats. Contains animation. Only capable of supporting a maximum of 256 colors. You cannot convert directly from a JPEG to GIF format. 2. JPEG ( Joint Photographic Experts Group ) It compresses files to get more graphics. Supports maximum color of 16.7 million 3. PNG ( Portab
Post a Comment
Read more

Chapter 3: Computer System Development

-
Image
What is SDLC ( System Development Life Cycle ) Definition SDLC or System Development Life Cycle is defined as the stages and tasks through which software is produced. It is a systematic process for building software that ensures the quality of the software. SDLC consists of a detailed plan which explains how to plan, build and maintain the software. Figure Phases i) Planning This is the first phase of SDLC. In this phase the required resources are managed to particular areas according to its need. This phase is for planing the objectives of the system. It sees who is going to use the system, how are they going to use it, what should be the input and what should be the output. ii) Analysis After planning system analysis is done to ensure the requirements of the user is fulfilled or not It also analyses if any problem is there and solutions are created based on it to make the system functional. iii) Design After analyzing the system to see i
Post a Comment
Read more

Chapter 2 : Programming Language

-
Image
⚠IF Y OU'RE LOOKING FOR  NOTES OF CIS THEN YOU HAVE COME TO THE RIGHT PLAC E  ⚠ Machine Level Language They are just Sequence of Numerals Programs written in Binary Form It is machine dependent Easier for machines to understand and not illegible/ readable for humans There are two parts: a) opcode - command words for operations such as ADD, COMPARE, etc b) operands- specifies the data, or the address of data. Advantages are Fast Execution and No Translation needed. Disadvantages are Error-Prone, Machine Dependent and hard to remember due to only containing 0's and 1's Assembly Language Mnemonics are used to write program in Assembly language Memory locations are replaced by Hexa-decimals. Assembler is used to translate Assembly Language into Machine Level Language Advantages are easy to memorize, faster than high-level language and easy to understand. Disadvantages are they are machine-dependent, knowledge of hardware si required and codi
Post a Comment
Read more

Chapter 1: Introduction to Computer

-
Image
⚠IF Y OU'RE LOOKING FOR  NOTES OF CIS THEN YOU HAVE COME TO THE RIGHT PLAC E  ⚠ Definition A computer is an electronic device, operating under the control of instructions provided by the user that is stored in its own memory which accepts data (input), processes the data accordingly to specified rules, gives out information (output ) and stores data for future use. A programmable electronic device that can store. retrieve and process data. The word computer comes from the Latin word 'Compute' which means calculate. Functions of a Digital Computer  Takes data as input Store data/instructions in the memory and use them when required. Process the data and convert them into useful information. Generate output and  Control the above four operations. Block Diagram of a Computer Characteristics of a computer  1. Word Length It is defined as the unit of information that the computer can process or transfer at a time. The word l
Post a Comment
Read more