diff --git a/.obsidian/app.json b/.obsidian/app.json
new file mode 100644
index 0000000..9e26dfe
--- /dev/null
+++ b/.obsidian/app.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/.obsidian/appearance.json b/.obsidian/appearance.json
new file mode 100644
index 0000000..9e26dfe
--- /dev/null
+++ b/.obsidian/appearance.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/.obsidian/core-plugins.json b/.obsidian/core-plugins.json
new file mode 100644
index 0000000..96869df
--- /dev/null
+++ b/.obsidian/core-plugins.json
@@ -0,0 +1,19 @@
+[
+  "file-explorer",
+  "global-search",
+  "switcher",
+  "graph",
+  "backlink",
+  "outgoing-link",
+  "tag-pane",
+  "page-preview",
+  "daily-notes",
+  "templates",
+  "note-composer",
+  "command-palette",
+  "editor-status",
+  "starred",
+  "outline",
+  "word-count",
+  "file-recovery"
+]
\ No newline at end of file
diff --git a/.obsidian/hotkeys.json b/.obsidian/hotkeys.json
new file mode 100644
index 0000000..9e26dfe
--- /dev/null
+++ b/.obsidian/hotkeys.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/.obsidian/workspace b/.obsidian/workspace
new file mode 100644
index 0000000..de830cb
--- /dev/null
+++ b/.obsidian/workspace
@@ -0,0 +1,141 @@
+{
+  "main": {
+    "id": "8111137dd523a948",
+    "type": "split",
+    "children": [
+      {
+        "id": "4c3f1e8174ea888a",
+        "type": "leaf",
+        "state": {
+          "type": "markdown",
+          "state": {
+            "file": "Databases/MongoDB/Update_document.md",
+            "mode": "source",
+            "source": false
+          }
+        }
+      }
+    ],
+    "direction": "vertical"
+  },
+  "left": {
+    "id": "c208e7d70edd06e0",
+    "type": "split",
+    "children": [
+      {
+        "id": "02e4c8499b8561fd",
+        "type": "tabs",
+        "children": [
+          {
+            "id": "28f6e409b5333eab",
+            "type": "leaf",
+            "state": {
+              "type": "file-explorer",
+              "state": {}
+            }
+          },
+          {
+            "id": "caaa4cc0617fb33f",
+            "type": "leaf",
+            "state": {
+              "type": "search",
+              "state": {
+                "query": "tag:#react-hooks",
+                "matchingCase": true,
+                "explainSearch": false,
+                "collapseAll": false,
+                "extraContext": false,
+                "sortOrder": "alphabetical"
+              }
+            }
+          },
+          {
+            "id": "7b8409a58bf89b90",
+            "type": "leaf",
+            "state": {
+              "type": "starred",
+              "state": {}
+            }
+          }
+        ]
+      }
+    ],
+    "direction": "horizontal",
+    "width": 300
+  },
+  "right": {
+    "id": "9275b1850c94a3ee",
+    "type": "split",
+    "children": [
+      {
+        "id": "fe17ff8bccd6ae3e",
+        "type": "tabs",
+        "children": [
+          {
+            "id": "d7dc194af9477454",
+            "type": "leaf",
+            "state": {
+              "type": "backlink",
+              "state": {
+                "file": "Databases/MongoDB/Update_document.md",
+                "collapseAll": false,
+                "extraContext": false,
+                "sortOrder": "alphabetical",
+                "showSearch": false,
+                "searchQuery": "",
+                "backlinkCollapsed": false,
+                "unlinkedCollapsed": true
+              }
+            }
+          },
+          {
+            "id": "f7b03048fe74c6cd",
+            "type": "leaf",
+            "state": {
+              "type": "outgoing-link",
+              "state": {
+                "file": "Databases/MongoDB/Update_document.md",
+                "linksCollapsed": false,
+                "unlinkedCollapsed": false
+              }
+            }
+          },
+          {
+            "id": "a76c53ace46b652c",
+            "type": "leaf",
+            "state": {
+              "type": "tag",
+              "state": {
+                "sortOrder": "frequency",
+                "useHierarchy": true
+              }
+            }
+          },
+          {
+            "id": "ff6c41f4a0ae3114",
+            "type": "leaf",
+            "state": {
+              "type": "outline",
+              "state": {
+                "file": "Databases/MongoDB/Update_document.md"
+              }
+            }
+          }
+        ]
+      }
+    ],
+    "direction": "horizontal",
+    "width": 300
+  },
+  "active": "4c3f1e8174ea888a",
+  "lastOpenFiles": [
+    "Databases/MongoDB/Querying_a_collection.md",
+    "Databases/MongoDB/Complete_example.md",
+    "Mathematics/Algebra/Negative_exponents.md",
+    "Mathematics/Algebra/Logarithms.md",
+    "Mathematics/Algebra/Equivalent_equations.md",
+    "Programming_Languages/Frameworks/React/React_Typescript/Built_in_hooks.md",
+    "Programming_Languages/Frameworks/React/Hooks/Application_state_management.md",
+    "Algorithms/Algorithmic_complexity.md"
+  ]
+}
\ No newline at end of file