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Algorithms unit test Study Guide Solutions Which of these best describes which algorithms are more efficient with parallel computing - ANSWER-An algorithm that benefits from parallel computing is one that can be broken down into smaller independent operations A software engineer at a mapping co...

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Algorithms unit test Study Guide Solutions

Which of these best describes which algorithms are more efficient with parallel computing -

ANSWER✔✔-An algorithm that benefits from parallel computing is one that can be broken down into

smaller independent operations

A software engineer at a mapping company is asked to write a geocoding program that can convert

6000,000 addresses into latitude/longitude pairs. The geocoding needs to be completed by the next day,

in time for a company deadline

When the engineer tries running the program on their computer, they realize that their computer cannot

complete the fast quickly enough. They decide to use distributed computing to improve the performance

- ANSWER✔✔-A distribution computing solution can geocode multiple addresses at once by using

multiple computers

The two algorithms below are both intended to calculate the sum of cubes from 1 to n, where n is any

positive integer.

For example, if n is 3, the algorithms should calculate a sum of 36, from 1^3 + 2^3 + 3^3. - ANSWER✔✔-

Both algorithms calculate the correct sum.

TensorFlow is an open-source machine learning platform with support for distributed computing.

This chart shows the speedup gained from using TensorFlow to train a neural network with an increasing

number of computers: - ANSWER✔✔-Distributed computing can reduce the time it takes to solve large

problems.

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An app for electric car owners includes a feature that shows them the charging station that's the nearest

to them.

To calculate that, the app first finds the 10 closest stations according to their beeline distance from the

user address. It then uses the procedure below to calculate the driving distance to each station and

returns the station with the shortest distance.

The call to calcDrivingDistance() takes 3 seconds to return a result, as the driving directions algorithm

requires searching through many possible routes to calculate the optimal route. The other operations,

like incrementing the index and comparing the distances, take only a few nanoseconds. - ANSWER✔✔-30

seconds

The following algorithm displays a sequence of 10 odd squares:

Start by setting n to 1.

Repeat 10 times:

Multiply n by itself and display the result

Add 2 to n - ANSWER✔✔-n ← 1

REPEAT 10 TIMES {

result ← n * n

DISPLAY(result)

n←n+2

}

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Which of these applications is NOT an example of distributed computing? - ANSWER✔✔-Premiere Pro is

a video editing program from Adobe that allows users to compose multiple videos and add special

effects. Exporting the final video requires a lot of computational power, so Premiere assigns different

parts of the exporting task to each of the computer's processors (as long as the computer has multiple

processors).

An online news website relies on in-page advertisements to make money. Their article pages have

multiple slots for advertisements, and each slot can be used for a full-size ad or multiple smaller ads.

Advertisers specify their size and desired display count per day. - ANSWER✔✔-Use a heuristic-based

algorithm that suggests an advertisement schedule that is close to optimal.

Han develops an algorithm to compute the average amount of time that users watch a particular video

on Khan Academy. He then realizes that the average is very low, due to a large number of times with

duration "0" or "1", and decides that the algorithm should ignore those durations. - ANSWER✔✔-

Selection

One way to measure the efficiency of an algorithm is to count how many steps it requires for different

input sizes and then use a function to describe how the number of steps increases in proportion to the

input size.

The table below lists various efficiencies, where n represents the input size. - ANSWER✔✔-n^2 + 6n =

polynomial

6^n = superpolynomial

6n^6 = polynomial

6^2n^2 = superpolynomial

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