C# Programming Assessments - Questions with Answers ItTechGenie

Q1

Find Items (SortedDictionary)

Work with SortedDictionary<string,long>, search by value, find min/max, and sort by sold count.

Given: public static SortedDictionary<String, long> itemDetails (already provided in template).

Method	Description
`FindItemDetails(long soldCount)`	Return matching item(s) whose sold count equals `soldCount`. If not found return empty dictionary and print Invalid sold count in Main.
`FindMinandMaxSoldItems()`	Return a `List<string>` where index 0 = minimum sold item name, index 1 = maximum sold item name.
`SortByCount()`	Return all items sorted in ascending order by sold count (value).

Main Flow: Get values from user → call methods → print results. If result is empty where specified, print the exact message.

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
    // In your template this is already provided.
    public static SortedDictionary<string, long> itemDetails = new SortedDictionary<string, long>()
    {
        { "Pen", 120 },
        { "Pencil", 80 },
        { "Notebook", 250 },
        { "Eraser", 60 }
    };

    // 1) Find items by sold count (value)
    public SortedDictionary<string, long> FindItemDetails(long soldCount)
    {
        var result = new SortedDictionary<string, long>();

        foreach (var kv in itemDetails)
        {
            if (kv.Value == soldCount)
                result[kv.Key] = kv.Value;
        }

        return result; // empty dictionary if not found
    }

    // 2) Find min and max sold item names (min first, max second)
    public List<string> FindMinandMaxSoldItems()
    {
        var result = new List<string>();

        if (itemDetails.Count == 0) return result;

        var min = itemDetails.OrderBy(kv => kv.Value).First();
        var max = itemDetails.OrderByDescending(kv => kv.Value).First();

        result.Add(min.Key);
        result.Add(max.Key);

        return result;
    }

    // 3) Sort all items by sold count and return as Dictionary
    public Dictionary<string, long> SortByCount()
    {
        return itemDetails
            .OrderBy(kv => kv.Value)
            .ToDictionary(kv => kv.Key, kv => kv.Value);
    }

    // Sample Main to test
    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter sold count to search: ");
        long soldCount = long.Parse(Console.ReadLine());

        var found = p.FindItemDetails(soldCount);
        if (found.Count == 0)
        {
            Console.WriteLine("Invalid sold count");
        }
        else
        {
            foreach (var kv in found)
                Console.WriteLine($"{kv.Key} : {kv.Value}");
        }

        var minMax = p.FindMinandMaxSoldItems();
        if (minMax.Count >= 2)
            Console.WriteLine($"Min Sold Item: {minMax[0]}, Max Sold Item: {minMax[1]}");

        Console.WriteLine("Sorted by sold count:");
        var sorted = p.SortByCount();
        foreach (var kv in sorted)
            Console.WriteLine($"{kv.Key} : {kv.Value}");
    }
}

Q2

Movie Stock (List<Movie>)

Parse comma-separated input into a Movie object, filter by genre, and sort by ratings.

Property	Type
Title	string
Artist	string
Genre	string
Ratings	int

Method	Description
`AddMovie(string movieDetails)`	Input format: `Title,Artist,Genre,Ratings`. Convert to `Movie` and add to `MovieList`.
`ViewMoviesByGenre(string genre)`	Return movies matching genre. If none, return empty list and print No Movies found in genre '{genre}' in Main.
`ViewMoviesByRatings()`	Sort by `Ratings` ascending and return list.

using System;
using System.Collections.Generic;
using System.Linq;

public class Movie
{
    public string Title { get; set; }
    public string Artist { get; set; }
    public string Genre { get; set; }
    public int Ratings { get; set; }
}

public class Program
{
    // In your template this is already provided.
    public static List<Movie> MovieList = new List<Movie>();

    public void AddMovie(string movieDetails)
    {
        // Expected: Title,Artist,Genre,Ratings
        string[] parts = movieDetails.Split(',');

        Movie m = new Movie
        {
            Title = parts[0].Trim(),
            Artist = parts[1].Trim(),
            Genre = parts[2].Trim(),
            Ratings = int.Parse(parts[3].Trim())
        };

        MovieList.Add(m);
    }

    public List<Movie> ViewMoviesByGenre(string genre)
    {
        // If your evaluation is strictly case-sensitive, replace OrdinalIgnoreCase with Ordinal.
        return MovieList
            .Where(m => m.Genre.Equals(genre, StringComparison.OrdinalIgnoreCase))
            .ToList();
    }

    public List<Movie> ViewMoviesByRatings()
    {
        return MovieList
            .OrderBy(m => m.Ratings)
            .ToList();
    }

    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter number of movies: ");
        int n = int.Parse(Console.ReadLine());

        for (int i = 0; i < n; i++)
        {
            Console.WriteLine("Enter movie details (Title,Artist,Genre,Ratings):");
            p.AddMovie(Console.ReadLine());
        }

        Console.Write("Enter genre to search: ");
        string g = Console.ReadLine();

        var byGenre = p.ViewMoviesByGenre(g);
        if (byGenre.Count == 0)
        {
            Console.WriteLine($"No Movies found in genre '{g}'");
        }
        else
        {
            Console.WriteLine("Movies by Genre:");
            foreach (var m in byGenre)
                Console.WriteLine($"{m.Title} | {m.Artist} | {m.Genre} | {m.Ratings}");
        }

        Console.WriteLine("Movies sorted by Ratings:");
        var sorted = p.ViewMoviesByRatings();
        foreach (var m in sorted)
            Console.WriteLine($"{m.Title} | {m.Artist} | {m.Genre} | {m.Ratings}");
    }
}

Q3

Calculate Numbers (GPA + Grade)

Use List<int> to compute GPA and map it to a grade letter.

Method	Description
`AddNumbers(int numbers)`	Add the number to `NumberList`.
`GetGPAScored()`	GPA = `((n13)+(n23)+...+(nk3)) / (count3)`. If list is empty return `-1` and print No Numbers Available.
`GetGradeScored(double gpa)`	Return grade using the GPA table. If GPA < 5 or > 10 return `'\0'` and print Invalid GPA.

GPA	Grade
Equal to 10	S
>= 9 and < 10	A
>= 8 and < 9	B
>= 7 and < 8	C
>= 6 and < 7	D
>= 5 and < 6	E

using System;
using System.Collections.Generic;

public class Program
{
    // In your template this is already provided.
    public static List<int> NumberList = new List<int>();

    public void AddNumbers(int numbers)
    {
        NumberList.Add(numbers);
    }

    public double GetGPAScored()
    {
        if (NumberList.Count == 0) return -1;

        // GPA formula in the question (credit point = 3)
        double sum = 0;
        foreach (int n in NumberList)
            sum += (n * 3);

        double gpa = sum / (NumberList.Count * 3);
        return gpa;
    }

    public char GetGradeScored(double gpa)
    {
        if (gpa < 5 || gpa > 10) return '\0';

        if (gpa == 10) return 'S';
        if (gpa >= 9) return 'A';
        if (gpa >= 8) return 'B';
        if (gpa >= 7) return 'C';
        if (gpa >= 6) return 'D';
        return 'E';
    }

    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter how many numbers: ");
        int count = int.Parse(Console.ReadLine());

        for (int i = 0; i < count; i++)
        {
            Console.Write($"Enter number {i + 1}: ");
            p.AddNumbers(int.Parse(Console.ReadLine()));
        }

        double gpa = p.GetGPAScored();
        if (gpa == -1)
        {
            Console.WriteLine("No Numbers Available");
            return;
        }

        Console.WriteLine($"GPA: {gpa}");
        char grade = p.GetGradeScored(gpa);

        if (grade == '\0')
            Console.WriteLine("Invalid GPA");
        else
            Console.WriteLine($"Grade: {grade}");
    }
}

Q4

Yoga Meditation (BMI + Fees)

Use ArrayList to store members, compute BMI (2 decimals), and calculate fee based on goal & BMI.

Properties (MeditationCenter): MemberId, Age, Weight, Height, Goal, BMI

Datatype	Property
int	MemberId
int	Age
double	Weight
double	Height
string	Goal
double	BMI

BMI Formula: BMI = Weight(Kgs) / (Height(In) * Height(In)) (BMI must be in 2 decimal places, hint: Math.Floor)

Goal	BMI Condition	Fee
Weight Loss	BMI >= 25 && BMI < 30	2000
Weight Loss	BMI >= 30 && BMI < 35	2500
Weight Loss	BMI >= 35	3000
Weight Gain	Any	2500

using System;
using System.Collections;
using System.Collections.Generic;

public class MeditationCenter
{
    public int MemberId { get; set; }
    public int Age { get; set; }
    public double Weight { get; set; }     // Kgs (as per question text)
    public double Height { get; set; }     // Inches (as per question text)
    public string Goal { get; set; }       // "Weight Loss" or "Weight Gain"
    public double BMI { get; set; }
}

public class Program
{
    // In your template this is already provided.
    public static ArrayList memberList = new ArrayList();

    public void AddYogaMember(int memberId, int age, double weight, double height, string goal)
    {
        MeditationCenter m = new MeditationCenter
        {
            MemberId = memberId,
            Age = age,
            Weight = weight,
            Height = height,
            Goal = goal,
            BMI = 0
        };

        memberList.Add(m);
    }

    public double CalculateBMI(int memberId)
    {
        foreach (MeditationCenter m in memberList)
        {
            if (m.MemberId == memberId)
            {
                double bmi = m.Weight / (m.Height * m.Height);

                // 2 decimal places using Math.Floor (truncate)
                bmi = Math.Floor(bmi * 100) / 100;

                m.BMI = bmi;
                return bmi;
            }
        }

        return 0; // not present
    }

    public int CalculateYogaFee(int memberId)
    {
        foreach (MeditationCenter m in memberList)
        {
            if (m.MemberId == memberId)
            {
                // Ensure BMI is calculated
                if (m.BMI == 0)
                    CalculateBMI(memberId);

                if (m.Goal == "Weight Gain")
                    return 2500;

                if (m.Goal == "Weight Loss")
                {
                    if (m.BMI >= 25 && m.BMI < 30) return 2000;
                    if (m.BMI >= 30 && m.BMI < 35) return 2500;
                    if (m.BMI >= 35) return 3000;
                }

                return 0; // for any other goal
            }
        }

        return 0; // member not found
    }

    public static void Main()
    {
        Program p = new Program();

        // Add a few sample members
        p.AddYogaMember(101, 26, 78, 68, "Weight Loss");
        p.AddYogaMember(102, 30, 55, 64, "Weight Gain");

        Console.Write("Enter MemberId to calculate BMI: ");
        int id = int.Parse(Console.ReadLine());

        double bmi = p.CalculateBMI(id);
        if (bmi == 0)
        {
            Console.WriteLine($"MemberId '{id}' is not present");
            return;
        }

        Console.WriteLine($"BMI: {bmi}");

        int fee = p.CalculateYogaFee(id);
        Console.WriteLine($"Yoga Fee: {fee}");
    }
}

Q5

Ecommerce Application (Custom Exception)

Throw InsufficientWalletBalanceException if wallet balance is less than purchase amount.

Class	Properties
EcommerceShop	string UserName, double WalletBalance, double TotalPurchaseAmount

Method	Description
`MakePayment(string name, double balance, double amount)`	Create and return object. If `balance < amount`, throw InsufficientWalletBalanceException with message Insufficient balance in your digital wallet.

Main: If payment is valid, print Payment successful. Otherwise catch exception and print the exception message. Output is case-sensitive.

using System;

public class EcommerceShop
{
    public string UserName { get; set; }
    public double WalletBalance { get; set; }
    public double TotalPurchaseAmount { get; set; }
}

public class InsufficientWalletBalanceException : Exception
{
    public InsufficientWalletBalanceException(string message) : base(message) { }
}

public class Program
{
    public EcommerceShop MakePayment(string name, double balance, double amount)
    {
        if (balance < amount)
            throw new InsufficientWalletBalanceException("Insufficient balance in your digital wallet");

        // Create object and return it
        return new EcommerceShop
        {
            UserName = name,
            WalletBalance = balance - amount,          // remaining balance (realistic)
            TotalPurchaseAmount = amount
        };
    }

    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter user name: ");
        string name = Console.ReadLine();

        Console.Write("Enter wallet balance: ");
        double balance = double.Parse(Console.ReadLine());

        Console.Write("Enter purchase amount: ");
        double amount = double.Parse(Console.ReadLine());

        try
        {
            EcommerceShop shop = p.MakePayment(name, balance, amount);
            Console.WriteLine("Payment successful");
        }
        catch (InsufficientWalletBalanceException ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
}

Q6

User Authentication (Password Mismatch Exception)

Return a user object only if password and confirmation password match (case-sensitive).

Class	Properties
User	string Name, string Password, string ConfirmationPassword

Method	Description
`ValidatePassword(string name, string password, string confirmationPassword)`	If password != confirmationPassword (case-sensitive), throw PasswordMismatchException with message Password entered does not match.

Main: If valid user object is returned, print Registered Successfully. Else catch exception and print message.

using System;

public class User
{
    public string Name { get; set; }
    public string Password { get; set; }
    public string ConfirmationPassword { get; set; }
}

public class PasswordMismatchException : Exception
{
    public PasswordMismatchException(string message) : base(message) { }
}

public class Program
{
    public User ValidatePassword(string name, string password, string confirmationPassword)
    {
        if (!password.Equals(confirmationPassword, StringComparison.Ordinal)) // case-sensitive
            throw new PasswordMismatchException("Password entered does not match");

        return new User
        {
            Name = name,
            Password = password,
            ConfirmationPassword = confirmationPassword
        };
    }

    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter name: ");
        string name = Console.ReadLine();

        Console.Write("Enter password: ");
        string pass = Console.ReadLine();

        Console.Write("Confirm password: ");
        string confirm = Console.ReadLine();

        try
        {
            User u = p.ValidatePassword(name, pass, confirm);
            Console.WriteLine("Registered Successfully");
        }
        catch (PasswordMismatchException ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
}

Q7

Construction Estimate (Validation Exception)

Approve only if ConstructionArea ≤ SiteArea. Else throw ConstructionEstimateException.

Class	Properties
EstimateDetails	float ConstructionArea, float SiteArea

Method	Description
`ValidateConstructionEstimate(float constructionArea, float siteArea)`	If constructionArea ≤ siteArea → return object. If constructionArea > siteArea → throw ConstructionEstimateException with message Sorry your Construction Estimate is not approved.

using System;

public class EstimateDetails
{
    public float ConstructionArea { get; set; }
    public float SiteArea { get; set; }
}

public class ConstructionEstimateException : Exception
{
    public ConstructionEstimateException(string message) : base(message) { }
}

public class Program
{
    public EstimateDetails ValidateConstructionEstimate(float constructionArea, float siteArea)
    {
        if (constructionArea <= siteArea)
        {
            return new EstimateDetails
            {
                ConstructionArea = constructionArea,
                SiteArea = siteArea
            };
        }

        throw new ConstructionEstimateException("Sorry your Construction Estimate is not approved");
    }

    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter Construction Area: ");
        float cArea = float.Parse(Console.ReadLine());

        Console.Write("Enter Site Area: ");
        float sArea = float.Parse(Console.ReadLine());

        try
        {
            EstimateDetails ed = p.ValidateConstructionEstimate(cArea, sArea);
            Console.WriteLine("Construction Estimate Approved");
        }
        catch (ConstructionEstimateException ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
}

Q8

User Verification (Phone Number Validation)

Phone number must be exactly 10 characters. Else throw InvalidPhoneNumberException.

Class	Properties
User	string Name, string PhoneNumber

Method	Description
`ValidatePhoneNumber(string name, string phoneNumber)`	If phoneNumber length == 10 → return user object. Else throw InvalidPhoneNumberException with message Invalid phone number.

using System;

public class User
{
    public string Name { get; set; }
    public string PhoneNumber { get; set; }
}

public class InvalidPhoneNumberException : Exception
{
    public InvalidPhoneNumberException(string message) : base(message) { }
}

public class Program
{
    public User ValidatePhoneNumber(string name, string phoneNumber)
    {
        if (phoneNumber != null && phoneNumber.Length == 10)
        {
            return new User
            {
                Name = name,
                PhoneNumber = phoneNumber
            };
        }

        throw new InvalidPhoneNumberException("Invalid phone number");
    }

    public static void Main()
    {
        Program p = new Program();

        Console.Write("Enter name: ");
        string name = Console.ReadLine();

        Console.Write("Enter phone number: ");
        string phone = Console.ReadLine();

        try
        {
            User u = p.ValidatePhoneNumber(name, phone);
            Console.WriteLine("User Verified");
        }
        catch (InvalidPhoneNumberException ex)
        {
            Console.WriteLine(ex.Message);
        }
}
}

C# Programming Assessments - Questions with Answers

C# Assessment Bank (Q&A)

Find Items (SortedDictionary)

Movie Stock (List<Movie>)

Calculate Numbers (GPA + Grade)

Yoga Meditation (BMI + Fees)

Ecommerce Application (Custom Exception)

User Authentication (Password Mismatch Exception)

Construction Estimate (Validation Exception)

User Verification (Phone Number Validation)