Info2 sec 2_-_data__information
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- Data is raw facts and figures that have no inherent meaning on their own. It can arise in many ways like transactions, experiments, surveys, and sensor readings. - Data can be direct, collected for a specific purpose, or indirect, collected for one purpose but later used for something different. - Data comes in different types like text, numbers, alphanumeric, images, video, and sound. It is coded and encoded before being processed by computer systems. - Information is derived from processing and organizing data in a meaningful way so it becomes useful and meaningful to the user. Factors like relevance, accuracy, and timeliness affect the quality of information.
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- Peer-to-peer networks have equal access between connected machines, while client-server networks have one centralized server computer that stores data and controls access for other client computers on the network.
- The Internet is the infrastructure that connects networks globally using TCP/IP, while the World Wide Web is
Info2 sec 5_-_protecting_ict_systems
The document summarizes key information about protecting data and systems on ICT networks. It discusses reasons for protecting data including privacy, identity theft, and threats to systems. Common threats are identified as viruses, hacking, fire or power loss. Systems can be protected through measures like access controls, encryption, firewalls, and regular software updates. Relevant legislation is outlined, including the Computer Misuse Act which prohibits unauthorized access or data modification, and the Data Protection Act which protects personal information.
Info2 sec 3_-_people__ict_systems
This document discusses characteristics of ICT users and how they interact with systems. It outlines 5 main user characteristics: physical, experience, task, age, and environment. It then examines different types of interfaces like command line, menus, graphical and natural language. The document also discusses how help and training can be provided to users. Finally, it briefly outlines some common ICT jobs and skills needed to work in the field, as well as what makes an effective ICT team.
Info2 sec 1_-_ict_systems
This document defines key ICT concepts and systems. It explains that ICT includes hardware, software, and communications technologies. An ICT system is a way of doing something using these technologies, with common examples being supermarket stock control, payroll, e-commerce, and banking systems. An ICT system has six main components - people, procedures, data, hardware, software, and information. ICT provides benefits like increased volume, accuracy, repetition, and speed of work.
Info2 -_overview
This course examines how technology impacts individuals, organizations, and society. It requires basic ICT knowledge covered in initial content before exam practice. The exam tests knowledge through short questions and application through multi-part questions, including an essay worth 16-20 marks assessing writing skills. Exam dates are in January and May.
Aqa specification
1. The document is the specification for the GCE AS and A Level exams in Information and Communication Technology (ICT) from 2009 onwards.
2. It provides details on the content and assessment of the four units that make up the AS and A Level qualifications, including the topics covered, exam structure, and coursework requirements.
3. The specification aims to bring the study of ICT up to date for the 21st century and allow for greater flexibility, practical work, and engagement with the subject through investigation rather than passive learning.
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The London 2012 Olympic Committee needs to ensure that all track and field events run smoothly. With over 600 sessions and 40 events, accurately tracking which athlete competes in each event and providing real-time updates is critical. Failure to manage the events properly could damage London's reputation and show of hosting a modern Olympics. Therefore, the student must create a relational database to logistically support event management in the Olympic Park, with live data feeds, covering all key information about athletes, timings and events. The database will be the basis for a 10-page report and exam questions.
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Info2 sec 2_-_data__information
- 2. By the end of today you should know •What is data •How does it arise •What forms data can take •Why we code data •Why we encode data •Why data is processed •What is information •What affects the quality of information
- 3. What is data? Data is raw facts and figures and has no apparent meaning
- 4. How does data arise? Data can arise in many ways: •You buy something whilst shopping. The transaction generates data that might include date, time, store, till, staff, product etc. •You conduct an experiment and record data such as time, pH, temperature etc. •You are undertaking research and carry out a questionnaire or a survey. •A sensor collects readings from an automatic weather station
- 5. Direct v Indirect data To confuse matters data can be collected directly or indirectly. Direct data is where data is collected for and used for a given purpose. Indirect data is where data is collected for one purpose and then used for something completely different A credit card company collects data about your spending in order to bill you each month. A secondary use of this data is to build up a “profile” of your spending habits. This data can then be used to send you direct marketing about goods and services that may appeal to you. Direct Use Customer of Data Billing Credit Card Transaction Indirect Use Direct of Data Marketing
- 6. What types of data are there? Data occurs in many types. •text e.g. a, b, c, d, e ... •numeric e.g. 0, 1, 2, 3, 4, 5... •alphanumeric (text and numbers) •a still image e.g. A static image taken by a digital camera or scanned in •a moving image e.g. motion captured by a camera or phone •sound e.g. The recording of an instrument or voice NOTE – this is the type of data NOT the form in which it is stored
- 7. Why do we code data? Data is coded before it gets anywhere near a computer system. This is carried out for a number of reasons
- 8. Why do we encode data?