You have been asked to design the on?board computer for a deep space vehicle. What special considerations would you have to take into consideration and how would it affect your design?
What will be an ideal response?
There are three problems with memory in spacecraft. The first is that power is very limited. It comes from either batteries (ok only for short missions), solar power (diminishes on long deep space journeys as the sun is left behind), or nuclear power (ok for long journeys but worry about the consequences of a failed launch).
For all these reasons, power consumption is a prime concern. The next problem is the effect of ionizing
radiation. Away from the protection of the atmosphere and the Earth’s magnetic field, cosmic radiation is a problem. A high?energy charged particle can erase data in DRAM. Magnetic and ovonic memories are far more robust than DRAM that stores data as a charge.
The third problem is that the memory must be very reliable. The call?out cost of a repair?being is quite
astronomical once you are beyond the orbit of Mars.
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Which of the following is the Windows quick key shortcut for the Zoom In tool?
A. [Ctrl][++] B. [Ctrl][+] C. [Spacebar][+] D. [Alt][+]
Match the following terms with their description:I.Total rowII.Totals queryIII.Property SheetIV.Expression BuilderV.Aggregate functionA.Calculation performed on a column and returns one valueB.Way to display aggregate function results when a query is runC.Tool to create complicated expressionsD.Where you can change the number of decimalsE.Displays aggregate function results as the last row in a table or query
Fill in the blank(s) with the appropriate word(s).
Which of the following agencies is NOT responsible for enforcing a violation of the Genetic Information Nondiscrimination Act ("GINA")?
A. Department of Labor B. Department of Health and Human Services ("HSS") C. Equal Employment Opportunity Commission ("EEOC") D. Federal Trade Commission("FTC")
Sara, a student, is interested in learning about distributed denial of service attacks. Which of the following types of malware is MOST likely the primary focus of her study?
A. Botnets B. Logic bombs C. Spyware D. Trojans