In the accompanying figure, which callout points to the button you should click to select header and footer options?
A. F
B. C
C. D
D. B
Answer: B
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Explain what could be different if the following line were put in your ~/.log- out file instead:
rm $HOME/.trash/*
________ are devices in a computer that are in either the on or off state
A) Unicodes B) Asynchronous circuits C) Synchronous circuits D) Electrical switches
Match the following common file extension to its associated program:
I. .docx II. .exe III. .jpg IV. .xlsx V. mp3 A. Microsoft Excel versions 2007 and later B. Microsoft Word versions 2007 and later C. compressible image D. compressible audio E. executable file
State any justifications or assumptions you make.
The BusyBee Cleaning Company specializes in providing cleaning services for both domestic and commercial clients. Each type of client has a set of requirements. For example, The Cardboard Box Company requires cleaning services from Monday to Friday 7am until 9am and 5pm until 7pm each day, but P. Nuttall only requires cleaning services on a Wednesday from 10am until 1pm. Whenever a new client is taken on, a BusyBee administrator assesses how many cleaning staff are required for the premises prior to assigning any staff to the job. Note that this is the ideal number, it may differ in practice. In addition, the administrator also assesses whether any specialist equipment is required and when. For example, three industrial floor cleaners may be needed on two out of five occasions for one commercial client. The cleaning staff work in groups of six, with a supervisor to oversee the work done. The other staff are administrative staff who manage the day-to-day office work including visiting new clients and ensuring the specialist equipment is properly maintained. (a) Develop an Entity–Relationship model from the above information. (b) Produce a set of tables from your Entity–Relationship model clearly identifying each primary key. (c) Demonstrate that your model supports the following transactions and explain how they might influence physical database design: (i) For a specific client, produce a schedule of the cleaning times together with the number of staff assigned, and details of any specialist equipment required. (ii) For a specific supervisor, produce a list of staff on their team together with their assignment details.