CSEC Video Revision


 These videos were chosen for each topic because they cover the subject matter in a relevant context. They definitely were not created specifically for the CSEC Syllabus, however , they do address the fundamental concepts in real world scenarios.

Explain the concept of Information Technology;Definition and scope Information Technology.https://www.youtube.com/watch?v=Z0A7OMkYQf8
Distinguish among the major types of computer systems in terms of processing speed, storage and portabilityMajor types:(a)Super Computers (for example, Cray).(b)Mainframes (for example,IBM zEnterprise System).(c)Desktop systems.(d)Mobile devices (for example, laptops, notebooks, netbooks, smartphones, tablets and game consoles).(e)Embedded devices (for example,special-purpose systems such as controllers in microwaves, car ignition systems, answering machines).Types of computers:https://www.youtube.com/watch?v=uD0acIhi8xE

What is a super computer:https://www.youtube.com/watch?v=utsi6h7IFPs

Using Supercomputers:https://www.youtube.com/watch?v=yvbSX–LOko

Explain the functions of the major hardware components of a computer system;Major  components:  input, central  processing unit,Primary memory   (RAM and ROM),secondary storage, output.(a)Secondary  storage devices:  hard disk,magnetic   tape, flash   drive, memorycard, and optical disks (CD, DVD and Blu-Ray).(b)Units  of storage:  bits,bytes,  kilobytes,megabytes, gigabytes, terabytesData Processing (IPOS) Cycle:https://www.youtube.com/watch?v=j0XOLp_PbgA
Ram and Rom: https://www.youtube.com/watch?v=XY18amKzOvA
Storage: https://www.youtube.com/watch?v=OsEDJM9NuGA

Units: https://www.youtube.com/watch?v=HRmfXA4EUBs
Explain how the major hardware components of a computer system interrelate;Input processing output storage (IPOS) cycle.Covered in an earlier video:https://www.youtube.com/watch?v=j0XOLp_PbgA
Evaluate the relative merits of cloud storage and local storage;Definition of cloud and local storage.Assessment criteria: capacity, cost, accessibility; security issues.Cloud: https://www.youtube.com/watch?v=gu4FYSFeWqg
Select appropriate input/output devices to meet the needs of specified applications;Associate the following devices with suitable applications:(a)Input:Optical mark reader (OMR), character readers (OCR,MICR),mouse,joystick,barcode reader, document scanner,light-pen, touch terminals,voice response unit, Touch Screens (tablets, point of sale, ATM),keyboard,digital camera,biometric systems, sensors, remote control, sound capture,pointing  devices,webcam.(b)Visual output:Printers (laser, inkjet, dot matrix, thermal, plotters, 3D Printers),microfilm.(c)Audible output: speakers,headphones,earphones.Omr:https://www.youtube.com/watch?v=Yd8PWYCT7w8
OCR : https://www.youtube.com/watch?v=jO-1rztr4O0

Micr : https://www.youtube.com/watch?v=LX-FyRcdUmM
Mouse: https://www.youtube.com/watch?v=eccSwn9QVxo

Explain the role of the different types of software in computer operation;System Software: Operating System, Utilities.Application software: general-purpose and special-purpose; integrated package; source: off the shelf, custom-written, and customized. 
Discuss the relative merits of the various types of user interface;Hardware: touch screens, specializedkeyboards.Software: command line, menu-driven, graphical user, touch. 
Evaluate the suitability of a given computer system for a specific purpose;Basic knowledge of system specification needed for purposes such as: to run a video game, web browsing, graphic design, video editing, and desktop publishing. Criteria:(a)Processing speed (CPU type and speed); (b)Memory (RAM);(c)Secondary storage (capacity and speed);(d)Types of software; and,(e)Input/Output devices.https://www.youtube.com/watch?v=eqrJmstbzu4

Troubleshoot basic computer hardware problems;Cable problems (for example, loose cables).Monitor problems (for example, improperly adjusted monitor controls).Printer problems (for example, changing printer cartridges).Battery problems (for example, loose or dead battery). 
Distinguish between data and information;Data as raw unprocessed facts;information as processed data.Sources of data and information (people, places and things).Document types: turnaround document, human-readable and machine-readable forms; hard copy, and soft copy.Data and information https://www.youtube.com/watch?v=sIjSY05JE9Q
Evaluate the reliability of information obtained from online sources;Evaluation of information retrieved electronically for authenticity, currency, relevance, and bias.https://www.youtube.com/watch?v=EyMT08mD7Ds
Differentiate between validation and verification of data;Difference between validation and verification. 
Identify appropriate validation and verification checks given a particular scenario;Methods of validation: range check,reasonableness checks, data type checks, consistency checks, presence, format and length. 
Select appropriate file organisation for particular application.File access methods: sequential, serial, direct and random.Application areas: archiving, payroll file, real time systems. 
Distinguish among types of networks;Types of networks (local area network, metropolitan area network, wide area network, mobile network).(a) Concept of mobile network as radio- based common carrier.(b) Overview of mobile networks: from 2G to current. (Knowledge of the inner workings of mobile systems is NOT required)Wireless network technologies (for example, Bluetooth, Wi-Fi, hotspot).Level of privacy (intranet, extranet, Internet).Types: https://www.youtube.com/watch?v=4_zSIXb7tLQ

Explain the functions of the basic components of a network;Basic components and functions:(a) Transmission media:(i) Wired: twisted pair, coaxial, fibre; and,(ii) Wireless: infrared, microwave, satellite.(b) Switch, router, modem. (c) Network interface card/network adapter.Hub/switch/router https://www.youtube.com/watch?v=1z0ULvg_pW8
Topologies : https://www.youtube.com/watch?v=zbqrNg4C98U
Cable: https://www.youtube.com/watch?v=qQYiwmamq38

Assess the importance of mobile communication technologies as a component of modern communication networks;Suitability of mobile networks to various applications (for example, education, commerce, and journalism). 
Explain the interrelationship among keyWeb technology concepts.World Wide WebHypertext Markup Language.Hypertext Transfer Protocol.Hyperlinks.Web Server.Web Page.File Transfer Protocol.Web Browser.Uniform Resource Locator.Upload and download. www:https://www.youtube.com/watch?v=J8hzJxb0rpc

© 2019  Vedesh Kungebeharry. All rights reserved.

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