wip: add ternary operator

src/data/question-groups/javascript/content/ternary-operator.md

@@ -0,0 +1,5 @@
+The ternary operator is a conditional operator that takes three operands. It is frequently used as a shortcut for the `if` statement.
+
+```js
+console.log(condition ? true : false);
+```

src/data/question-groups/javascript/javascript.md

@@ -27,17 +27,17 @@ questions:
     answer: In JavaScript, `var` is function-scoped and was traditionally used to declare variables. `let` and `const` are block-scoped. The key difference between `let` and `const` is that `let` allows for reassignment while `const` creates a read-only reference.
     topics:
       - 'Core'
-      - 'Intermediate'
+      - 'Beginner'
   - question: What is the difference between `null` and `undefined`?
     answer: The `null` is an assignment value. It can be assigned to a variable as a representation of no value. But the `undefined` is a primitive value that represents the absence of a value, or a variable that has not been assigned a value.
     topics:
       - 'Core'
-      - 'Intermediate'
+      - 'Beginner'
   - question: What is the difference between `==` and `===`?
     answer: equality-operator.md
     topics:
       - 'Core'
-      - 'Intermediate'
+      - 'Beginner'
   - question: What are the different ways to declare a variable in JavaScript?
     answer: There are three ways to declare a variable in JavaScript `var`, `let`, and `const`.
     topics:
@@ -48,4 +48,9 @@ questions:
     topics:
       - 'Core'
       - 'Intermediate'
+  - question: What is ternary operator in JavaScript?
+    answer: ternary-operator.md
+    topics:
+      - 'Core'
+      - 'Intermediate'
 ---