
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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To demonstrate your ability to differentiate between physical and schematic representations, provide examples of both.
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- Code requirements: A robot is positioned on an integral point in a two-dimensional coordinate grid (xr, yr). There is a treasure that has been placed at a point in the same grid at (xt, yt). All x’s and y’s will be integral values. The robot can move up (North), down (South), left (West), or right (East). Commands can be given to the robot to move one position in one of the four direction. That is, “E” moves a robot one slot East (to the right) so if the robot was on position (3, 4), it would now be on (4, 4). The command N would move the robot one position north so a robot at position (4, 4) would be at (4, 5). Because the robot cannot move diagonally, the shortest distance between a robot at (xr, yr) and a treasure at (xt, yt) is | xr – xt | + | yr - yt | = ShortestPossibleDistance Write a recursive program which determines all the unique shortest possible paths from the robot to the treasure with the following stipulation: The robot may never move in the same direction more than…arrow_forwardWhat mental pictures do you conjure up whenever you consider email? Once an email is sent, how does it go from A to B? Recount everything you have picked up so far. Is there an explanation for these discrepancies, and if so, what is it? Is there variation in the complexity of your models?arrow_forward1. The representation must be on a linear scale (not logarithmic) Linear scale means each year is given the same weight in your scaling. The student is to present the years in a way that really helps the audience to visualize just how long Earth has been around compared to how short an amount of time humans have been on earth, for example. 2. The must include a legend that allows the audience to interpret how they are representing the time since each event has occurred (e.g., 1cm = 1000 years, 1mL = 100,000 years, 1 second = 10,000 years) 4. The student is to include the following important events: Start of life (~3.8 GYA[1]) Origin of eukaryotes (~2–3.5 GYA - your choice within that range) Origin of multicellularity (~2 GYA) Origin of Homo sapiens(~200 KYA) Present time (0 YA) 5. The student is to include at least 3 other events. The events must relate to the history of Earth, not human history. The student will need to find the dates of these events Formation of Earth…arrow_forward
- 4:1 MULTIPLEXER (BEHAVIOURAL MODELLING) Explain the applications of multiplexer? Explain dataflow and behavioural modelling?arrow_forwardHow can simulation models be used to simulate categorically diverse issues?arrow_forwardAn interactive system's usefulness may be ensured by how it is created. Is there a specific example you can give? (Examples are required to demonstrate the point)arrow_forward
- In order to show that you are able to differentiate between the two types of representations, you should include examples of both physical and schematic representations.arrow_forwardWhat types of mental pictures come to mind when you think of email? Where does an email really go after it's been sent? Put together a rundown of everything you can think of that you know right now. I was wondering if someone could explain the thinking behind these variations. Which of your models best exemplifies the range of complexity you've encountered?arrow_forwardIn order to show that you are able to differentiate between the two types of representations, you should include examples of both physical and schematic representations.arrow_forward
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