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Frequently Asked Questions
Q. 1) Write a recursive function that accepts an array of integers and returns an array with the elements in reverse order. Example: [10, 20, 30, 40] should return [40, 30, 20, 10].
In Python, you can reverse an array using recursion by progressively removing the last element of the array and adding it to the beginning of a new array. This process continues until the array is empty. Here's the conceptual flow: Base Case: If the array is empty, return the empty array. Recursive Case: Take the last element of the array and concatenate it with the result of reversing the remaining array.
Q. 2) Create a recursive function that accepts an array of strings and returns a new array with the order of strings reversed. Example: ["apple", "banana", "cherry"] should return ["cherry", "banana", "apple"].
Similar to reversing an array of integers, the task is to reverse an array of strings using recursion. The base case is when the array is empty, and the recursive case involves taking the last string and concatenating it with the reversed rest of the array. Example: For an array ["apple", "banana", "cherry"], the function would return ["cherry", "banana", "apple"].
Q. 3) Assessment Part 2: Complete the following questions in an MS Word Document in APA format. Double space your work and use APA formatting sans-serif. (Example 12-point font using Times New Roman. You must include both a separate cover and reference page. 1. Research and compare cellular 3G, 4G-LTE and 5G - LTE Advanced. Include the technological differences between the implementations and include the importance of multiplexing and error correction. 2. List the three of the most common types of noise found in wireless technology? Provide a solution for correcting one of the listed noises and state whether the solution is or is not effective. 3. Name two common types of noise found on a computer network? Explain why noise is a bigger problem for analog transmission of data. Provide one specific example or reason. (Hint: consider how data is compressed when being transmitted). 4. Under what circumstances will error correction work, and when will it not work? Investigate and provide some detail on Forward Error Correction in the above context.
3G: Speed of 384 kbps to 2 Mbps, uses W-CDMA, basic error correction (ARQ). 4G-LTE: Speed of 100 Mbps to 1 Gbps, uses OFDM and MIMO, advanced error correction (Turbo Codes). 5G-LTE Advanced: Speed up to 10 Gbps, uses massive MIMO and millimeter waves, sophisticated error correction (LDPC).
Q. 4) Research and compare cellular 3G, 4G-LTE, and 5G-LTE Advanced. Include the technological differences between the implementations and the importance of multiplexing and error correction.
Thermal Noise: Random electron motion. Interference Noise: External signals disrupting communication. Cross-talk Noise: Signals from other channels interfering. Solution for Thermal Noise: Forward Error Correction (FEC) reduces errors, but it has limitations and cannot fully eliminate noise.
Q. 5) List three of the most common types of noise found in wireless technology. Provide a solution for correcting one of the listed noises and state whether the solution is effective. 3. Name two common types of noise found on a computer network. Explain why noise is a bigger problem for analog transmission of data. Provide one specific example or reason. (Hint: consider how data is compressed when being transmitted). 4. Under what circumstances will error correction work, and when will it not work? Investigate and provide some detail on Forward Error Correction in the above context. Instructions: Complete the questions in an MS Word document in APA format. Double-space your work, using a 12-point font in Times New Roman. Include both a separate cover page and a reference page.
Jitter: Variability in packet arrival times. Latency: Delay in packet transmission. Why Analog Transmission is Worse: Noise distorts continuous analog signals more severely than digital signals, making recovery harder.
Q. 6) Design a tail-recursive function in C++ that returns the nth Fibonacci number, where the first two numbers of the series are defined as 1 and 1.
Works: When error rates are low and the corruption is minimal. Doesn't Work: When errors are too severe, and data is lost beyond recovery. Forward Error Correction (FEC) works in low-error conditions but fails when the data is heavily corrupted.
Q. 7) Write a tail-recursive function in Scala to compute the nth Fibonacci number, with the sequence starting from 1 and 1.
Steps: Obtain Router Login Credentials: Ensure you have the username and password provided by your ISP. Connect the Router: Connect your computer to the router either using an Ethernet cable or through Wi-Fi. Access Router's Configuration Page: Open a web browser and enter the router’s IP address (e.g., 192.168.1.1 or 192.168.0.1). Login: Enter the username and password to log in to the router's admin panel. Configure WAN Settings: Set up the internet connection by entering details such as the PPPoE username and password, if necessary. Set Up LAN Settings: Define the local network IP range and DHCP settings. Configure Wi-Fi: Choose an SSID (network name), set the security type (WPA2), and create a password. Save Settings and Restart Router: Apply the changes and restart the router to ensure proper setup.
Q. 8) Implement a tail-recursive function in Haskell that calculates the nth Fibonacci number, assuming the first two numbers in the Fibonacci sequence are 0 and 1.
Scala's tail-recursive Fibonacci function follows the same approach as C++, maintaining two variables and recursively reducing n.
Q. 9) Write instructions for a task of your choosing. (choose task own your own, student is doing network engineering.
Login: Use the router’s IP address (e.g., 192.168.1.1) to access the admin panel. Configure WAN Settings: Enter ISP details for internet connection (e.g., PPPoE). LAN Settings: Set up local network IP and DHCP. Wi-Fi Configuration: Set SSID, security type (WPA2), and password. Save and Restart: Apply changes and restart the router for proper setup.
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