Added api questiosn in a db.json file

api/apiserverstart.md

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+`json-server db.json`

api/db.json

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+{
+    "questions": [
+      {
+        "id": "1",
+        "category": "C++",
+        "type": "quiz",
+        "question": "What is the output of the following code: std::cout << sizeof(int);",
+        "answer": "The output depends on the system, typically 4 on most systems."
+      },
+      {
+        "id": "2",
+        "category": "geography",
+        "type": "quiz",
+        "question": "What is the capital of France?",
+        "answer": "Paris"
+      },
+      {
+        "id": "3",
+        "category": "cybersecurity",
+        "type": "true or false",
+        "question": "A firewall can protect a network from all types of cyber attacks.",
+        "answer": "false"
+      },
+      {
+        "id": "4",
+        "category": "C++",
+        "type": "true or false",
+        "question": "C++ supports multiple inheritance.",
+        "answer": "true"
+      },
+      {
+        "id": "5",
+        "category": "geography",
+        "type": "quiz",
+        "question": "Which is the largest continent by land area?",
+        "answer": "Asia"
+      },
+      {
+        "id": "6",
+        "category": "cybersecurity",
+        "type": "quiz",
+        "question": "What does the acronym 'DDoS' stand for?",
+        "answer": "Distributed Denial of Service"
+      },
+      {
+        "id": "7",
+        "category": "C++",
+        "type": "quiz",
+        "question": "Which C++ standard introduced the concept of 'auto' keyword?",
+        "answer": "C++11"
+      },
+      {
+        "id": "8",
+        "category": "geography",
+        "type": "true or false",
+        "question": "The Amazon River is the longest river in the world.",
+        "answer": "false"
+      },
+      {
+        "id": "9",
+        "category": "cybersecurity",
+        "type": "quiz",
+        "question": "What is the main purpose of encryption?",
+        "answer": "To protect data confidentiality by converting it into a code."
+      },
+      {
+        "id": "10",
+        "category": "C++",
+        "type": "quiz",
+        "question": "What is the function of the 'virtual' keyword in C++?",
+        "answer": "It allows a member function to be overridden in a derived class."
+      }
+    ]
+  }
+