Computer Architecture Focuses on how a computer actually works. Important components Central Processing Unit (CPU) Also called processor or microprocessor A computer cannot work without this part Usually a single microchip contains the CPU as an integrated circuit. All processing …
The Purpose of Encryption Public network based data transmission has a risk of interception A hacker in such circumstances is called an eavesdropper Encryption can lower the risk Encryption means converting data into unreadable form It DOES NOT prevent interception …
Data transferring from one device to another may not be perfect. Here, interference can occur Data loss Data gained Data changed Password not transmitted correctly, it won’t work Address not transmitted correctly, things won’t be received Accuracy of data is …
Data Packets Sending data over long distances Requires breaking data in data packets Also called datagrams Usually very small 64 KiB Easier to control over long continuous data stream of data Each packet can be sent through a different route …
Measurement of Data Storage Bit Basic unit of computer memory storage It either has a value of 0 or 1. Word comes from Binary digIT. Byte Smallest unit of memory in computer 1 byte has 8 bits. Nibble Half the …
Character Sets – ASCII Code and Unicode ASCII code American Standard Code for Information Interchange Set up in 1963 Newer version in 1986 The standard character set consists of 7-bit codes 0 to 127 in denary. 00 to 7F in …
1.0 Lesson Objectives 1.1 Basics of Computer In computer, 1 means on and 0 means off Everything must be converted to this machine language the computer understands only machine language The denary number system is where the base is 10. …
Topics: Macromolecules Addition Polymerization Polyethene Uses of Poly Ethene Condensation Polymerization Nylon Terylene Uses Non-biodegradable plastics Natural Macromolecules Protein Fat Hydrolysis Macromolecules: Macromolecules are very large structures that are built from small units called monomers. They are polymerized molecules as …
Topics: Air Air Oxygen How are gases cooled? Separation of Air components Pollution Air Pollution Catalytic Converter Acid rain Ozone Green House effect Global Warming Water Physical Properties Uses Causes of Water Pollution Removal of Impurities Seawater Purification Air: Air: …
Topics: Properties of Metals Metals Physical Properties Trend In metallic character Alloys Reactivity Series Reactivity Series Importance of reactivity series Redox Reaction Extraction of Metals Ore Iron Construction of blast furnace Manufacture of Steel Rusting of Iron Aluminum Properties of …