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**Problem Solving Using Computational Thinking Answer**

**Week- 1**

Foundations of Computational Thinking Quiz

1.

Question 1

In computational thinking terms, breaking down a complex problem into smaller, more specific sub-problems is called ___________.

1 point

- Problem Identification
**Decomposition**- Pattern Recognition

2.

Question 2

True or False: Computational thinking techniques can help programmers conceptualize problems before they begin programming.

1 point

**True**- False

3.

Question 3

In computational thinking terms, framing a problem and determining if it can be solved by computers is known as _________.

1 point

- Abstraction
**Problem Identification**- Pattern Recognition

4.

Question 4

While writing a program for building a cake, you decide that some information is less relevant for your particular program. For instance, you might decide that you don’t need to know the flavor of ice cream that the cake is being served with, and you don’t need to know what color plates the cake is being served on. In computational thinking terms, this process of ignoring or filtering out less relevant information is known as _______.

1 point

- Pattern Recognition
- Decomposition
**Abstraction**

5.

Question 5

True or False: When identifying a problem for a computer to solve, it is best to identify problems that are subjective or open-ended.

1 point

**False**- True

6.

Question 6

True or False: Computational thinking is a linear process.

1 point

**False**- True

**Week- 2**

Airport Surveillance Case-Study Quiz

1.

Question 1

Identifying suspicious behavior at an airport is a complex problem. In this case study, what was one strategy for decomposing this problem into a smaller, more manageable problem?

1 point

- Design an algorithm that counts how often luggage is left unattended.
- Use machine learning to track which parts of the airport is the busiest.
- Design an algorithm that can differentiate between airport staff and travelers.
**Define a specific type of suspicious behavior in quantifiable terms.**

2.

Question 2

When designing an algorithm that will detect unattended luggage, what kind of information would likely NOT be relevant to this problem?

1 point

- The length of time luggage has been left unattended.
- Whether a piece of luggage is idle or moving.
- The distance between attended luggage and its owner.
**The types of clothing people in an airport are wearing.**

3.

Question 3

Using the following algorithm, what would happen if the luggage in one video frame is not seen in the next frame?

1 point

- The algorithm checks to see how long the luggage has been moving.
- The algorithm generates a warning.
**No warning is given, and the algorithm checks if there are more objects to categorize in the frame**.- The algorithm checks to see if the luggage is accompanied by a human.

4.

Question 4

Since computer-based solutions require questions that are specific and quantifiable, which one of the following questions is most appropriate for a computer-based solution?

1 point

- What kind of luggage is the most aesthetically pleasing?
- What kind of behavior is suspicious?
**How many people have entered the airport in the past two hours?**- Why is flying better than driving a car?

5.

Question 5

What is an algorithm? Choose the best answer:

1 point

- The process of identifying parts of a problem that can be ignored when approaching a problem.
- The process of identifying patterns that can lead you to a potential solution.
- The breaking down of a large, complex problem, into smaller more manageable problem.
**A process or defined set of rules used by a computer for solving an identified problem.**

**Week-3 **

Epidemiology Case-Study Quiz

1.

Question 1

In the epidemiology case study, we constructed the following algorithm:

In this algorithm, S represents the number of people susceptible to infection, b represents the rate of infection, I represents the number of people infected, r represents the recovery rate, and R represents the number of people who have recovered from infection.

Using this algorithm, what changes would we expect if more people washed their hands and covered their coughs during flu season?

1 point

- The number of susceptible people (S) would increase, which would result in an increased number of infected people (I).
- The recovery rate (r) would decrease, resulting in more recovered people (R).
- The number of infected people (I) would increase, which would result in more recovered people (R).
**The rate of infection (b) would decrease, which would result in less infected people (I).**

2.

Question 2

In the epidemiology case study, the SIR model accounted for the number of people susceptible to infection, the rate of infection, the number of people infected, the rate of recovery, and the number of people who recovered from the infection. If we wanted to create a more accurate model for predicting the spread of the flu, what information would be most relevant for this problem?

1 point

**The migration patterns of infected people.**- The dental records of susceptible people in a given location.
- The amount of electricity people use in their homes.
- The number of cell phone calls recovered people make in a day.

3.

Question 3

Predicting the number of people who will become infected with the seasonal flu can be a complex problem. In computational thinking terms, describing this complex problem in such a way so that it can be solved by a computer is known as __________.

1 point

- Evaluation
**Problem Identification**- Abstraction
- Pattern Recognition

4.

Question 4

In the epidemiology case study, the SIR model utilized the following information: the number of people susceptible to infection (S), the rate of infection (b), the number of people infected (I), the recovery rate (r), and the number of people who recovered from infection (R). This process of focusing on relevant information and ignoring less relevant information represents what computational thinking technique?

1 point

**Abstraction**- Decomposition
- Evaluation
- Problem Identification

5.

Question 5

In the epidemiology case study, we expanded on the original SIR model by adding information about vaccinations. The expanded model looked like this:

In this expanded model, the number of vaccinations (V) decreases the number of people who are susceptible to infection (S).

Using this algorithm, what will happen to the number of people recovered (R) at the end of an epidemic if we increase V at the beginning?

1 point

- The number of people recovered (R) will increase.
- The number of people recovered (R) will stay the same.
**The number of people recovered (R) will decrease.**

**Week- 4**

Next Case: Potential Applications of Computational Thinking to Human Trafficking

1.

Question 1

Our next case study will examine hypothetical implications of Computational Thinking on the issue of Human Trafficking. Because of this subject material, this case is optional, and we recommend proceeding only if you are comfortable with the subject. Would you like to continue?

1 point

**Yes, I am comfortable with exploring this topic area.**- No, I would like skip this case study and continue further in the course.

**Week- 5**

Peer-graded Assignment: Final Project

**Conclusion**

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