42747
Description
Flashcards by Katie Difford, updated more than 1 year ago
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Created by Katie Difford
about 12 years ago
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| Question | Answer |
| Identify two characteristics of data | Has no meaning Raw facts and figures Not possible to understand data |
| Identify two pieces of data using in a hotel booking system | 221195 1007 |
| Using an example related to pupils, show how data can become information | 98.7. This is data as it is not possible to make sense of it. If the structure of percentage is used and the context of students attendance, we know that the student has 98.7% attendance |
| Using examples, describe one advantage and one disadvantage of using sound to convey a message to the crowd in an athletics stadium | An advantage would be that the information could get to a lot of people at one time, for example, an announcement of who won would only be read out once. A disadvantage would be that if someone is deaf they would not be able to hear the information, for example, a fire alarm |
| Describe two advantages of using LED to convey information to people in a cinema | Can be seen in the dark meaning that cinema seats can be found a lot easier. Can be used in noisy places as they do not involve the disturbance of other cinema goers. |
| Using an example of information and an example of knowledge, describe the difference between information and knowledge | Information is the processed data, it has a meaning but it needs to be applied to a situation in order for us to use it and create knowledge. For example, information could be that we have £140 pounds in our bank, but knowledge tells us that we need to save £60 to buy the festival ticket |
| Using examples, describe two characteristics of knowledge | Knowledge can change, for example, at traffic lights, green means it is safe to go but if a car has jumped the lights then the driver would have to change their knowledge to stop and wait until it is safe. More information can be added to our knowledge making it more in depth, for example, the boiling point of water changes with altitude |
| Identify the most appropriate data type for garden length and house price | Garden length - Real House price - integer |
| What is the difference between an integer and a real number? | An integer number is a whole number with no decimal places, for example, 42. A real number has decimal places, for example, 42.6 |
| Compare a paper brochure with the internet for finding a holiday | A paper brochure is more accessible as you do not need the internet to access it. However, the internet allows you to book immediately and therefore allows you to choose options and will give you a revised price of your holiday. A paper brochure has limited options where as the internet has unlimited places to book |
| Describe two advantages of using a CD instead of the internet for researching a project on the normans | One advantage is that it would be safer. The user would not be able to access inappropriate info and put themselves at risk. Another advantage is that the information is more reliable as the source is known and recognized |
| Describe two advantages to using direct data sources to collect information on how good a new paperback book by your favourite author is | The exact data that is required can be collected, for example, only obtain information on how good the book is. The source is known and verified, means that the information comes from trustworthy and reliable sources |
| Describe two advantages of using indirect data sources to collect information on airline passengers | There is a large range of data available, meaning that the information required is likely to be found. Data is also available from different locations meaning that a wide range of information is used |
| Using an example, demonstrate how accuracy, level of detail and completeness are linked | Accuracy, level of detail and completeness are all linked because if just one of them is not correct then the other three are connected. For example, if the information is not complete, then it is also inaccurate and the level of detail is also inappropriate |
| Describe using examples, how the quality of information can be affected by its presentation | If the colours of the text and the background clash then the user may not be able to read the information and use it. If the text is too small then the user may also struggle to read it and use the information |
| Using an example, show how encoding can coarsen the precision of data | The data may not be as accurate is it should be for example, if a question in a survey was what's your favourite colour and the participant said light blue, then the encoded data will say it was just blue, leading to inaccurate results |
| Describe one advantage of encoding data collected by a survey | The speed of input from the paper surveys into a computer for analysis is much quicker |
| Using an example, show how verification cannot ensure that the data is correct | Verification ensures that the source document is the same as the on-screen document, but does not make sure that the data is correct, for example in the source document "the" could be spelt "teh". If this error is made when the data is input then the verification checker will not pick it up |
| Give examples of transcription and transposition errors and show how they would be picked up by computer verification | Transcription - miscopied data for example, form and from, the computer will scan the two copies and flag any differences to the user and allow them to make changes Transposition - where numbers/letters are round the wrong way, for example, kdis (kids). During the manually re-entering of the data the user will pick up this problem and change it |
| What is the difference between back-up and archiving data? | Back-up is making a copy of the data and storing it in a removable storage device in a different location to the original. Archiving is the movement of data that is not required immediately. It is also stored in a location off site |
| Describe two reasons why it is necessary to archive data | It saves a lot of memory as documents that may not be required immediately can still be stored but not take up a lot of memory space. You also eliminate the waste of time that results from the back-up of unused files |
| Identify two hardware and two software costs, apart from the standard computer, that will be incurred when producing a website | Hardware; Repair and maintenance costs, mouse to control the actions on screen Software; website design software, upgrades |
| Describe two personnel costs incurred by an organisation wanting to produce the leaflet | Training on how to use the software to create the leaflet and wages for the people working on the leaflet |
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