Overview of this chapter Binary System Basic unit Conversion between Binary and Denary Hexadecimal System Advantage & Usage Conversion between Hex and Denary Conversion between Binary and Hex 1.1 Binary System The binary number system (base 2) which comprises of only 0s and 1s is used by computers to process Read more…
Overview of this chapter Section Sub-section Page 2.1 Catergories of data transmission 2.1.1 Classification by direction 2 2.1.2 Classification by serial / parallel 2.1.3 Classification by synchronization 2.2 Error detection 2.2.1 Parity check 3 2.2.2 Check sum / digit 2.2.3 ARQ 2.2.4 Echo check 2.3 USB 4 Maintenance History Updated Read more…
Overview How to connect to the Internet Internet Service Provider(ISP) Internet (Web) Server Internet Protocol (IP) Address MAC addresses Uniform Resource Locator(URL) How to build up a webpage HyperText Mark-up Language (HTML) How to transmit data between user and server Hypertext transfer protocol (HTTP) Hypertext Transfer Protocol Secure (HTTPS) How Read more…
Chapter Overview Different types of Logic Gate NOT OR NOR XOR (EOR) AND NAND Pastpaper Question 3.1 Different types of Logic Gate NOT GATEAn Inverter that only has one input, it reverses the logic state Truth Table A A‘ 0 1 1 0 OR GATEAn OR gate can have two Read more…
In this part, we are going to study the operating systems and very basic concepts of how they work inside computers.Now let’s start! OVERVIEW Definition of OS Functions of OS Variations of OS Single-user Multi-tasking Operating System Polling Powering up Why is OS not needed in small devices? What is Read more…
The basic concepts of Computer Architecture OVERVIEW Interrupt Buffer Von Neumann Architecture Components Involved Buses Fetch-decode-execute Cycle Addressing Interrupt Interrupt is a signal sent from either a software or the device directly When the processor receives an interrupt signal, it’s going to stop its current task (what it’s doing now) temporarily and service the sender of this interrupt signal after saving the status of current task. After interrupt’s fully Read more…
Chapter Overview DATA IS STORED IN VARIOUS FORMS BUT THE COMPUTER CONVERTS ALL OF IT TO BINARY DATA (MACHINE LANGUAGE) Compression Technique Lossy Compression Lossless Compression Ways to compress File formats Musical Instrument Digital Interface (MIDI) Sound & Video Digital Image Text and number File size estimation 6.1.1 Compression Compression Read more…
Overview of this chapter Difference between primary, secondary, and off-line storage Primary storage RAM / Dynamic RAM / Static RAM ROM / EEPROM Secondary storage HDD SSD Off-line storage CD / VCD / DVD DVD-RAM Blue-ray Hard disk Flash memory Primary, secondary, and off-line storage PURPOSE: Primary: faster, stores the Read more…
Syllabus 7.1. High- and Low-level Languages 7.1.1. HIGH-LEVEL LANGUAGES HLL enable programmers to focus on the problem to be solved, require no knowledge of the hardware and instruction set of the computer that will use the program. Closer to human language Write in a shorter time Debug at the development Read more…
Syntax errors The errors that occur when translators are translating the program into machine code. These errors are always caused by stupid like spelling mistake, missing punctuation. SYNTAX ERRORS WHEN COMPILING The executable file will not be produced, and you will get a message that shows you why and where Read more…