Master-Level Programming Assignment Questions Solved by Experts

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Sample Master-Level Programming Assignment 1: Python – Data Analysis Using Pandas

Question:
Write a Python script that reads a CSV file containing customer transaction data (name, transaction_id, amount, date), filters out transactions above $500, groups the data by date, and plots the daily transaction count using Matplotlib.

Solution:

import pandas as pd
import matplotlib.pyplot as plt

# Read CSV file
df = pd.read_csv('transactions.csv')

# Filter transactions above $500
filtered_df = df[df['amount'] > 500]

# Group by date and count
daily_counts = filtered_df.groupby('date').size()

# Plotting
daily_counts.plot(kind='bar', title='High-Value Transactions per Day')
plt.xlabel('Date')
plt.ylabel('Transaction Count')
plt.tight_layout()
plt.show()

✅ Expert Tip: Ensure the date column is in datetime format to avoid grouping errors. Also, always sanitize your data before visualizing it.

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Sample Master-Level Programming Assignment 2: Java – Multithreaded File Search Utility

Question:
Develop a multithreaded Java application that searches for a specific keyword in all .txt files within a given directory. The program should output the filename and line number where the keyword appears.

Solution:

import java.io.*;
import java.util.concurrent.*;

public class FileSearch {
    public static void main(String[] args) throws InterruptedException {
        File folder = new File("documents/");
        ExecutorService executor = Executors.newFixedThreadPool(5);

        for (File file : folder.listFiles()) {
            if (file.getName().endsWith(".txt")) {
                executor.submit(() -> searchFile(file, "keyword"));
            }
        }

        executor.shutdown();
    }

    static void searchFile(File file, String keyword) {
        try (BufferedReader br = new BufferedReader(new FileReader(file))) {
            String line;
            int lineNum = 1;
            while ((line = br.readLine()) != null) {
                if (line.contains(keyword)) {
                    System.out.println(file.getName() + " - Line " + lineNum);
                }
                lineNum++;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

✅ Expert Tip: Use ExecutorService to handle concurrency safely and shut it down properly after task execution.

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