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Update Python_Programming_Quiz.md

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`@@ -435,3 +435,51 @@ Note: __Use lambda functions when an anonymous function is required for a short`
`435`	`435`	`#### 27. What are iterators in Python ?`
`436`	`436`
`437`	`437`	`#### 28. What is the difference between an iterator and a generator ?`
	`438`	`+`
	`439`	`+#### 29. What do you know about palindromes? Can you implement one in Python?`
	`440`	`+`
	`441`	`+A palindrome is a phrase, a word, or a sequence that reads the same forward and backward. <br>`
	`442`	`+One such example will be _pip_ An example of such a phrase will be _‘nurses run’_.`
	`443`	`+`
	`444`	`+__Normal Function Implementation:__`
	`445`	`+`
	`446`	+```
	`447`	`+def isPalindrome(string):`
	`448`	`+ left, right = 0, len(string)-1`
	`449`	`+ while right >= left:`
	`450`	`+ if not string[left] == string[right]:`
	`451`	`+ return False`
	`452`	`+ left+=1;right-=1`
	`453`	`+ return True`
	`454`	`+`
	`455`	`+isPalindrome('redrum murder')`
	`456`	`+# returns True`
	`457`	`+`
	`458`	`+isPalindrome('CC.')`
	`459`	`+# returns False`
	`460`	+```
	`461`	`+`
	`462`	`+__Iterator Implementation:__`
	`463`	`+`
	`464`	+```
	`465`	`+def isPalindrome(string):`
	`466`	`+ left, right = iter(string), iter(string[::-1])`
	`467`	`+ i=0`
	`468`	`+ while i < len(string)/2:`
	`469`	`+ if next(left)!=next(right):`
	`470`	`+ return False`
	`471`	`+ i+=1`
	`472`	`+ return True`
	`473`	`+`
	`474`	`+isPalindrome('redrum murder')`
	`475`	`+# prints True`
	`476`	`+`
	`477`	`+isPalindrome('CC.')`
	`478`	`+# prints False`
	`479`	`+`
	`480`	`+isPalindrome('CCC.')`
	`481`	`+# prints False`
	`482`	`+`
	`483`	`+isPalindrome('CCC')`
	`484`	`+# prints True`
	`485`	+```

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