This book "Concepts of Programming Languages - Solution to Unsolved Problems " is a basic learning approach for programming learners. It provides simple and easy programming constructs which are applicable to various programming languages. Finding a solution to unsolvable programming problem is not an easy task. Every language is different in nature and hence required a thorough knowledge of understanding. This book is purely questionnaire guide for professional and graduate students and hence provide a solution to each and every questionnaire of Concepts of Programming Languages. With this book, you will be able to find solutions to the Concepts of Programming Languages in a questionnaire form. This is not a practical couch, although it provides solutions to all the questionnaires raised in Concepts of Programming Languages. The solution involved in this book are perfect solutions which are appreciated by engineering graduates and then included as part of this book.