diff --git a/Check_if_Array_Is_Sorted_and_Rotated.java b/Check_if_Array_Is_Sorted_and_Rotated.java
new file mode 100644
index 00000000..0c7d98b4
--- /dev/null
+++ b/Check_if_Array_Is_Sorted_and_Rotated.java
@@ -0,0 +1,20 @@
+public class Check_if_Array_Is_Sorted_and_Rotated {
+    public static void main(String[] args) {
+        int nums[] = { 2, 1, 3, 4 };
+        System.out.println(check(nums));
+    }
+
+    public static boolean check(int arr[]) {
+        int n = arr.length;
+        int c = 0;
+        for (int i = 1; i < n; i++) {
+            if (arr[i - 1] > arr[i]) {
+                ++c;
+            }
+        }
+        if (arr[n - 1] > arr[0]) {
+            ++c;
+        }
+        return c <= 1;
+    }
+}
\ No newline at end of file
diff --git a/Remove_Duplicates_from_Sorted_Array.java b/Remove_Duplicates_from_Sorted_Array.java
new file mode 100644
index 00000000..70490d58
--- /dev/null
+++ b/Remove_Duplicates_from_Sorted_Array.java
@@ -0,0 +1,13 @@
+public class Remove_Duplicates_from_Sorted_Array{
+    public static void main(String[] args) {
+        int arr[]={1,1,2};
+        int n=arr.length;
+        int unique=1;
+        for(int i=1;i<n;i++){
+            if(arr[i]!=arr[i-1]){
+                arr[unique++]=arr[i];
+            }
+        }
+        System.out.println(unique);
+    }
+}