shuklaksh_Update hoisting-iii_en.md

quiz/hoisting-iii_en.md

@@ -1,4 +1,27 @@
 
-There is no solution yet.
+TLDR : -
+2
+1
+undefined
+
+Explaination
+
+=> As we know variable declaration,hence the code in global scope will be hoisted i.e 
+1. a is decalared in window object and assigned undefined.
+2. function func is saved in the memory.
+3. b is decalared in window object and assigned undefined
+
+=> now during the code execution 
+1. var a = 1, will assign 1 to a;
+2. when our code encounters func() it creates is own execution context in which hoisting happend again
+  2.1 now var a is decalared and assigned undefined initially
+  2.2 encountering a = 2 will change a's value to 2.
+  2.3 console.log(a) will print 2. 
+
+3. now func's execution context is closed 
+4. code encounters console.log(a) and print global a which is 1
+5. if (!('b' in window)) this condition is checked and it comes out as false as b is already hoisted with initial value of undefined
+6.console.log(b) prints undefined
+
 
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