diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Apparel.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Apparel.java
new file mode 100644
index 00000000..b399993d
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Apparel.java
@@ -0,0 +1,48 @@
+// Author : Akanksha  Shrivastava
+// Purpose : Apparel entity class that is a child of product and lists details of apparel items.
+
+package com.exam.bean;
+
+public class Apparel extends Product {
+
+	//data members
+	private String size;
+	private String material;
+	
+	//default constructor
+	public Apparel() {
+		super();
+		size = null;
+		material = null;
+	}
+
+	//parameterized constructor
+	public Apparel(String size, String material) {
+		super();
+		this.size = size;
+		this.material = material;
+	}
+
+	//setter and getter methods
+	public String getSize() {
+		return size;
+	}
+
+	public void setSize(String size) {
+		this.size = size;
+	}
+
+	public String getMaterial() {
+		return material;
+	}
+
+	public void setMaterial(String material) {
+		this.material = material;
+	}
+
+	// Overriding toString method
+	@Override
+	public String toString() {
+		return super.toString() +"Apparel [size=" + size + ", material=" + material + ", toString()=" + "]";
+	}
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Electronics.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Electronics.java
new file mode 100644
index 00000000..6a59f2cc
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Electronics.java
@@ -0,0 +1,36 @@
+// Author : Akanksha Shrivastava
+// Purpose : Electronics entity class that inherits Product class and contains details about electronic items. 
+
+package com.exam.bean;
+
+public class Electronics extends Product {
+
+	//data memebers
+	private int warranty;
+
+	//default constructor 
+	public Electronics() {
+		warranty = 0;
+	}
+
+	//parameterized constructor
+	public Electronics(int warranty) {
+		super();
+		this.warranty = warranty;
+	}
+
+	//setter and getter methods
+	public int getWarranty() {
+		return warranty;
+	}
+
+	public void setWarranty(int warranty) {
+		this.warranty = warranty;
+	}
+
+	//Overriding toString method
+	@Override
+	public String toString() {
+		return super.toString()+"Electronics [warranty=" + warranty + "]";
+	}	
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/FoodItem.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/FoodItem.java
new file mode 100644
index 00000000..dc5ea25c
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/FoodItem.java
@@ -0,0 +1,56 @@
+// Author : Akanksha Shrivastava
+// Purpose : FoodItem entity class which is a child of Product class and stores details of food items.
+
+package com.exam.bean;
+
+import java.util.Date;
+
+public class FoodItem extends Product {
+
+	//data members
+	private Date dateOfManufacture;
+	private Date dateOfExpiry;
+	private String vegetarian;
+	
+	//default constructor
+	public FoodItem() {
+		super();
+		dateOfManufacture = null;
+		dateOfExpiry = null;
+		vegetarian = null;
+	}
+	//parameterized constructor
+	public FoodItem(Date dateOfManufacture, Date dateOfExpiry, String vegetarian) {
+		super();
+		this.dateOfManufacture = dateOfManufacture;
+		this.dateOfExpiry = dateOfExpiry;
+		this.vegetarian = vegetarian;
+	}
+	
+	//setter and getter methods
+	public Date getDateOfManufacture() {
+		return dateOfManufacture;
+	}
+	public void setDateOfManufacture(Date dateOfManufacture) {
+		this.dateOfManufacture = dateOfManufacture;
+	}
+	public Date getDateOfExpiry() {
+		return dateOfExpiry;
+	}
+	public void setDateOfExpiry(Date dateOfExpiry) {
+		this.dateOfExpiry = dateOfExpiry;
+	}
+	public String getVegetarian() {
+		return vegetarian;
+	}
+	public void setVegetarian(String vegetarian) {
+		this.vegetarian = vegetarian;
+	}
+	
+	//Overriding toString method
+	@Override
+	public String toString() {
+		return super.toString()+"FoodItem [dateOfManufacture=" + dateOfManufacture + ", dateOfExpiry=" + dateOfExpiry + ", vegetarian="
+				+ vegetarian + "]";
+	}
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Product.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Product.java
new file mode 100644
index 00000000..f7bfbe96
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/bean/Product.java
@@ -0,0 +1,71 @@
+// Author : Akanksha Shrivastava
+// Purpose : abstract Product entity class acting as base class to all kinds of products.
+
+package com.exam.bean;
+
+abstract public class Product {
+
+	//data members
+	private int itemCode;
+	private String itemName;
+	private double unitPrice;
+	private int quantity;
+	
+	//default constructor
+	public Product() {
+		
+		itemCode = 0;
+		itemName = null;
+		unitPrice = 0.0;
+		quantity = 0;
+	}
+	
+	//parameterized constructor
+	public Product(int itemCode, String itemName, double unitPrice, int quantity) {
+		
+		this.itemCode = itemCode;
+		this.itemName = itemName;
+		this.unitPrice = unitPrice;
+		this.quantity = quantity;
+	}
+	
+	//setter and getter methods
+	public int getItemCode() {
+		return itemCode;
+	}
+
+	public void setItemCode(int itemCode) {
+		this.itemCode = itemCode;
+	}
+
+	public String getItemName() {
+		return itemName;
+	}
+
+	public void setItemName(String itemName) {
+		this.itemName = itemName;
+	}
+
+	public double getUnitPrice() {
+		return unitPrice;
+	}
+
+	public void setUnitPrice(double unitPrice) {
+		this.unitPrice = unitPrice;
+	}
+
+	public int getQuantity() {
+		return quantity;
+	}
+
+	public void setQuantity(int quantity) {
+		this.quantity = quantity;
+	}
+
+	//Overriding toString method from Object class
+	@Override
+	public String toString() {
+		return "Product [itemCode=" + itemCode + ", itemName=" + itemName + ", unitPrice=" + unitPrice + ", quantity="
+				+ quantity + "]";
+	}
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/dao/ProductDao.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/dao/ProductDao.java
new file mode 100644
index 00000000..e3874327
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/dao/ProductDao.java
@@ -0,0 +1,17 @@
+//Author : Akanksha Shrivastava
+//Purpose : Data Access Interface which lists the methods for addition and retrieval of product data.
+
+package com.exam.dao;
+
+import com.exam.bean.Product;
+import com.exam.exception.DuplicateIdException;
+import com.exam.exception.ItemNotFoundException;
+
+public interface ProductDao {
+
+	boolean addNewProduct(Product ob);//throws DuplicateIdException;
+	
+	void retrieve(Product ob); //throws ItemNotFoundException;
+	
+	void report(Product ob);
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/dao/ProductDaoImpl.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/dao/ProductDaoImpl.java
new file mode 100644
index 00000000..4bc0c61b
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/dao/ProductDaoImpl.java
@@ -0,0 +1,80 @@
+//Author : Akanksha Shrivastava
+//Purpose : Implementation of ProductDao interface.
+
+package com.exam.dao;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+
+import com.exam.bean.Apparel;
+import com.exam.bean.Electronics;
+import com.exam.bean.FoodItem;
+import com.exam.bean.Product;
+import com.exam.exception.DuplicateIdException;
+import com.exam.exception.ItemNotFoundException;
+
+public class ProductDaoImpl implements ProductDao {
+
+	
+	//creating sets
+	static Set<FoodItem> foodItems;
+	static Set<Apparel> apparelList;
+	static Set<Electronics> electronicItems;
+	
+	static {
+		
+		foodItems = new TreeSet<>();
+		apparelList = new TreeSet<>();
+		electronicItems = new TreeSet<>();
+	}
+
+	@Override
+	public boolean addNewProduct(Product ob) {//throws DuplicateIdException {
+		
+		if(ob instanceof FoodItem) {
+			foodItems.add((FoodItem)ob);
+			return true;
+		}
+		else if(ob instanceof Apparel) {
+			apparelList.add((Apparel)ob);
+			return true;
+		}
+		else if(ob instanceof Electronics) {
+			electronicItems.add((Electronics)ob);
+			return true;
+		}
+		else 
+			return false;
+	}
+
+	@Override
+	public void retrieve(Product ob) {//throws ItemNotFoundException {
+		
+		if(ob instanceof FoodItem) {
+			for(FoodItem f:foodItems) {
+				if(ob.equals(f)) {
+					((FoodItem)ob).toString();
+				}
+			}
+		}
+		else if(ob instanceof Apparel) {
+			for(Apparel a:apparelList) {
+				if(ob.equals(a)) {
+					((Apparel)ob).toString();
+				}
+			}
+		}
+		else if(ob instanceof Electronics) {
+			electronicItems.add((Electronics)ob);
+		}
+	}
+
+	@Override
+	public void report(Product ob) {
+		// TODO Auto-generated method stub
+		
+	}
+
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/exception/DuplicateIdException.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/exception/DuplicateIdException.java
new file mode 100644
index 00000000..59c41247
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/exception/DuplicateIdException.java
@@ -0,0 +1,11 @@
+//Author : Akanksha Shrivastava
+//Purpose : A class extending Exception class to handle the case of duplicate ID entered by user.
+
+package com.exam.exception;
+
+public class DuplicateIdException extends Exception {
+
+	public DuplicateIdException(String message) {
+		super(message);
+	}
+}
diff --git a/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/exception/ItemNotFoundException.java b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/exception/ItemNotFoundException.java
new file mode 100644
index 00000000..4c18972d
--- /dev/null
+++ b/Practical_exam_Akanksha_Shrivastava_WFS4/src/com/exam/exception/ItemNotFoundException.java
@@ -0,0 +1,12 @@
+//Author : Akanksha Shrivastava
+//Purpose : a class extending Exception class to handle the case when requested item is not present.
+
+package com.exam.exception;
+
+public class ItemNotFoundException extends Exception {
+
+	public ItemNotFoundException(String message) {
+		super(message);
+	}
+
+}
diff --git a/ReadMe.docx b/ReadMe.docx
new file mode 100644
index 00000000..a279896d
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