Computer Science

what is Computational hardness assumption in unit 7 computer science

evaluate the advantages and drawbacks of concurrent processing and caching

.parameters can be used to reduce the use of global variables. compare the use of parameters to global variables in recursive functions

compare the performance of dijkstra's algorithm and the A* search algorithm, making reference to heuristics, to find the shortest path to the problem.

A frieze is a decorative pattern made from repeated copies of a basic element arranged in a line. Figure 1 shows part of a vertical frieze on the wall of a house. a.Provide a top-level decomposition of the problem of drawing a frieze, assuming for the moment that the basic element is repeated just 3 times. At this stage you are not trying to produce a solution; just break the problem itself down into smaller parts. We are looking for a ‘bird’s eye view’ that could apply to a frieze composed of any basic element, and for now you should just assume that the exact form of the basic element will be considered later, so you can just say ‘draw basic element’ for that step.

Nasdaq is an online global marketplace for buying and trading securities. When they store a share price, they first multiply its value by 10,000. For example, if a share has a value of $12.3456 it is stored as 123,456. The resulting value is stored in a 4-byte binary unsigned integer representation. In 2021, the share price for a particular share reached $435,120.0000, which would have caused the share price shown on the Nasdaq website to unexpectedly plummet to $5,623.2704. Name the error that nearly occurred and explain what happened. [Note that in fact Nasdaq caught this problem before it happened, but if they had not, the consequences would have been catastrophic, with shares being offered for sale for a fraction of their worth and existing investors having the value of their investments plummeting.]