Master-Level Programming Assignment Questions and Solutions for Students Seeking Reliable Expert Help

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Sample Master-Level Programming Assignment Questions & Expert Solutions

Question 1: Implementing a Concurrency-Controlled Task Scheduler (Java)

Problem:

Design a concurrent task scheduler using Java that accepts multiple tasks with varying priorities. The scheduler should:

1. Use a thread-safe priority queue.

2. Allow dynamic task addition at runtime.

3. Ensure higher-priority tasks are executed before lower-priority ones.

4. Prevent race conditions using appropriate synchronization techniques.

Expert Solution (Simplified):

import java.util.concurrent.*;
public class PriorityTaskScheduler {
    private final PriorityBlockingQueue<ScheduledTask> taskQueue;
    private final ExecutorService executor;
    public PriorityTaskScheduler(int poolSize) {
        taskQueue = new PriorityBlockingQueue<>();
        executor = Executors.newFixedThreadPool(poolSize);
        start();
    }
    private void start() {
        Runnable dispatcher = () -> {
            while (true) {
                try {
                    ScheduledTask task = taskQueue.take();
                    executor.submit(task.getRunnable());
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            }
        };
        new Thread(dispatcher, "Task-Dispatcher").start();
    }
    public void addTask(Runnable runnable, int priority) {
        taskQueue.put(new ScheduledTask(runnable, priority));
    }
    private static class ScheduledTask implements Comparable<ScheduledTask> {
        private final Runnable runnable;
        private final int priority;
        ScheduledTask(Runnable r, int p) {
            this.runnable = r;
            this.priority = p;
        }
        public Runnable getRunnable() {
            return runnable;
        }
        @Override
        public int compareTo(ScheduledTask other) {
            return Integer.compare(other.priority, this.priority);
        }
    }
}

Explanation:

Our expert solution uses PriorityBlockingQueue to maintain thread-safe priority ordering and an ExecutorService to manage task execution. Dynamic task addition is supported, and the dispatcher thread ensures scheduled tasks are consistently executed in the correct order. This is the level of clarity students can expect when requesting programming assignment help australia.

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Question 2: Data Normalization & Query Optimization in SQL for a Banking System

Problem:

A banking system stores transaction data in a single denormalized table, causing redundancy and slow query performance. Normalize the database to 3NF and write an optimized SQL query to retrieve all transactions above $10,000 performed by VIP customers in the past 90 days.

Expert Solution (Simplified):

Step 1: Normalized Tables (3NF)

1. Customers(customer_id, name, tier, email)

2. Accounts(account_id, customer_id, type)

3. Transactions(txn_id, account_id, amount, txn_date)

Step 2: Optimized SQL Query

SELECT t.txn_id, t.amount, t.txn_date, c.name
FROM Transactions t
JOIN Accounts a ON t.account_id = a.account_id
JOIN Customers c ON a.customer_id = c.customer_id
WHERE c.tier = 'VIP'
  AND t.amount > 10000
  AND t.txn_date >= CURRENT_DATE - INTERVAL '90 days';

Explanation:

The normalization separates entities to reduce redundancy and improve structural integrity. The optimized query uses precise joins and filters to minimize processing time—exactly the kind of expertly crafted solution students receive when they choose our specialized programming assignment help australia service.

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