diff --git a/OOP/Java/Assignments/FISAC/Q4.java b/OOP/Java/Assignments/FISAC/Q4.java
new file mode 100644
index 0000000..298a3e5
--- /dev/null
+++ b/OOP/Java/Assignments/FISAC/Q4.java
@@ -0,0 +1,48 @@
+import java.util.*;
+
+class Employee {
+    String empName, empCode;
+    int leaveBalance[] = {13, 12, 10};
+    Employee(String name, String code) { empName = name; empCode = code; }
+}
+
+class EmployeeNotFound extends Exception { EmployeeNotFound(String s) { super(s); } }
+class NoLeaves extends Exception { NoLeaves(String s) { super(s); } }
+
+public class LeaveManagement {
+    static List<Employee> employees = Collections.synchronizedList(new ArrayList<>());
+    public static void main(String[] args) {
+        Thread t1 = new Thread(() -> {
+            employees.add(new Employee("Alice", "E1"));
+            employees.add(new Employee("Bob", "E2"));
+            employees.add(new Employee("Charlie", "E3"));
+            employees.add(new Employee("David", "E4"));
+            employees.add(new Employee("Eve", "E5"));
+        });
+
+        Thread t2 = new Thread(() -> {
+            try {
+                Scanner sc = new Scanner(System.in);
+                String code = sc.next(), type = sc.next();
+                int days = sc.nextInt(), idx = type.equals("Comp") ? 0 : type.equals("Casual") ? 1 : 2;
+                boolean found = false;
+                for (Employee e : employees) {
+                    if (e.empCode.equals(code)) {
+                        found = true;
+                        if (e.leaveBalance[idx] >= days) e.leaveBalance[idx] -= days;
+                        else throw new NoLeaves("Not enough leaves");
+                    }
+                }
+                if (!found) throw new EmployeeNotFound("Employee not found");
+            } catch (Exception ex) { System.out.println(ex.getMessage()); }
+        });
+
+        try { t1.start(); t1.join(); t2.start(); t2.join(); } catch (InterruptedException e) { e.printStackTrace(); }
+
+        synchronized (employees) {
+            for (Employee e : employees) {
+                System.out.println(e.empName + " - Casual Leaves: " + e.leaveBalance[1]);
+            }
+        }
+    }
+}