5 Function questions added

Author: anishkoulgi

code-snippets/functions.md

@@ -0,0 +1,173 @@
+<div align="center">
+  <h1>Functions</h1>
+</div>
+
+<ol>
+
+<li>
+
+**What will be the output ?**
+
+```js
+x = 1;
+function func() {
+  this.x = 2;
+  return x;
+}
+let a = new func();
+console.log(a.x);
+```
+
+- A: `1`
+- B: `2`
+- C: `undefined`
+
+<br/>
+
+<details>
+<summary><b>Answer</b></summary>
+<p>
+
+#### Option: B
+
+</p>
+</details>
+
+</li>
+
+---
+
+<li>
+
+**What will be the output ?**
+
+```js
+let arr = Array.from(Array(10).keys());
+function func(a) {
+  console.log(arguments.length);
+}
+func(arr);
+func(...arr);
+```
+
+- A: `10 10`
+- B: `10 1`
+- C: `1 10`
+- D: `1 1`
+
+<br/>
+
+<details>
+<summary><b>Answer</b></summary>
+<p>
+
+#### Option: C
+
+</p>
+</details>
+
+</li>
+
+---
+
+<li>
+
+**What will be the output ?**
+
+```js
+function func(a, b) {
+  arguments[1] = 2;
+  console.log(b);
+}
+func(1);
+```
+
+- A: `2`
+- B: `undefined`
+- C: `1`
+- D: `null`
+
+<br/>
+
+<details>
+<summary><b>Answer</b></summary>
+<p>
+
+#### Option: B
+
+</p>
+</details>
+
+</li>
+
+---
+
+<li>
+
+**What will be the output ?**
+
+```js
+var x = 3;
+var obj = {
+  x: 2,
+  foo: {
+    x: 1,
+    bar: function () {
+      return this.x;
+    },
+  },
+};
+var func = obj.foo.bar;
+console.log(func());
+console.log(obj.foo.bar());
+```
+
+- A: `3 1`
+- B: `undefined 1`
+- C: `1 1`
+- D: `2 1`
+
+<br/>
+
+<details>
+<summary><b>Answer</b></summary>
+<p>
+
+#### Option: A
+
+</p>
+</details>
+
+</li>
+
+---
+
+<li>
+
+**What will be the output ?**
+
+```js
+var foo = function foo() {
+  console.log(foo === foo);
+};
+foo();
+```
+
+- A: `false`
+- B: `true`
+- C: `error`
+
+<br/>
+
+<details>
+<summary><b>Answer</b></summary>
+<p>
+
+#### Option: B
+
+</p>
+</details>
+
+</li>
+
+---