Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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### UNIT 2 — MILESTONE 2: Lists and Loops Milestone

#### Question 6

**What is the return result of the dB2 function from the following code?**

```python
import math

def dB2(param1, param2):
    dB_calc = 20 * math.log10(param1/param2)
    if dB_calc > 6:
        return "High SNR"
    elif dB_calc > 0:
        return "Low SNR"
    else:
        return "Noise"

print(dB2(5,5))
```

**Options:**

- O Noise
- O High SNR
- O Low SNR
- O 0

**Explanation:**

The given Python function `dB2` calculates the signal-to-noise ratio (SNR) in decibels. Here is a step-by-step breakdown of the function:

1. **Importing the math module**: The `math` module is imported to facilitate mathematical operations.
2. **Defining the function `dB2` with two parameters `param1` and `param2`**:
    - It calculates the dB value using the formula: `dB_calc = 20 * math.log10(param1/param2)`.
3. **Conditional checks**:
   - If `dB_calc` is greater than 6, it returns `"High SNR"`.
   - If `dB_calc` is greater than 0 but less than or equal to 6, it returns `"Low SNR"`.
   - If `dB_calc` is less than or equal to 0, it returns `"Noise"`.
4. **Function Call**: The function is called with parameters 5 and 5 (`print(dB2(5,5))`). 

**Calculation**:
- Since param1 is equal to param2, `dB_calc` becomes 20 * log10(5/5) = 20 * log10(1) = 20 * 0 = 0.

Thus, the function will return `"Noise"`.

**Correct Answer**: Noise
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Transcribed Image Text:### UNIT 2 — MILESTONE 2: Lists and Loops Milestone #### Question 6 **What is the return result of the dB2 function from the following code?** ```python import math def dB2(param1, param2): dB_calc = 20 * math.log10(param1/param2) if dB_calc > 6: return "High SNR" elif dB_calc > 0: return "Low SNR" else: return "Noise" print(dB2(5,5)) ``` **Options:** - O Noise - O High SNR - O Low SNR - O 0 **Explanation:** The given Python function `dB2` calculates the signal-to-noise ratio (SNR) in decibels. Here is a step-by-step breakdown of the function: 1. **Importing the math module**: The `math` module is imported to facilitate mathematical operations. 2. **Defining the function `dB2` with two parameters `param1` and `param2`**: - It calculates the dB value using the formula: `dB_calc = 20 * math.log10(param1/param2)`. 3. **Conditional checks**: - If `dB_calc` is greater than 6, it returns `"High SNR"`. - If `dB_calc` is greater than 0 but less than or equal to 6, it returns `"Low SNR"`. - If `dB_calc` is less than or equal to 0, it returns `"Noise"`. 4. **Function Call**: The function is called with parameters 5 and 5 (`print(dB2(5,5))`). **Calculation**: - Since param1 is equal to param2, `dB_calc` becomes 20 * log10(5/5) = 20 * log10(1) = 20 * 0 = 0. Thus, the function will return `"Noise"`. **Correct Answer**: Noise
### UNIT 2 — MILESTONE 2: Lists and Loops Milestone

#### Question 5

Suppose you have a list defined in the following way:
```
myList = [[12, 11, 10], [9, 8, 7], [6, 5, 4], [3, 2, 1]]
```
What are the correct dimensions of this list?

- [ ] 12 x 1
- [ ] 3 x 4
- [x] 4 x 3
- [ ] 1 x 12

[Save & Continue]

[Report an issue with this question]

#### Explanation

The provided list `myList` is a two-dimensional list (often referred to as a matrix). It consists of 4 rows and 3 columns. Each sub-list within the main list is a row containing 3 elements. Therefore, the correct dimensions of `myList` are 4 rows by 3 columns (4 x 3).
expand button
Transcribed Image Text:### UNIT 2 — MILESTONE 2: Lists and Loops Milestone #### Question 5 Suppose you have a list defined in the following way: ``` myList = [[12, 11, 10], [9, 8, 7], [6, 5, 4], [3, 2, 1]] ``` What are the correct dimensions of this list? - [ ] 12 x 1 - [ ] 3 x 4 - [x] 4 x 3 - [ ] 1 x 12 [Save & Continue] [Report an issue with this question] #### Explanation The provided list `myList` is a two-dimensional list (often referred to as a matrix). It consists of 4 rows and 3 columns. Each sub-list within the main list is a row containing 3 elements. Therefore, the correct dimensions of `myList` are 4 rows by 3 columns (4 x 3).
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