Understanding overflow and underflow in two's complement are key to debug incorrect computational errors. Similarly type casting errors in C/C++ languages could also lead to confusion and frustration. Overflow and underflow are keywords that describe situations when variables or values cannot be represented or processed correctly because they are either too large or too small. In this video you will understand the concept of overflow, underflow and type casting errors that you would encounter while programming in c. These surprises are due to some limitations of the two's complement that are very important to understand. As a programmer you need to understand the limitations of your machine, which is the key to not only encounter and be prepared for these errors but also to understand the phenomenon due to which they occur. Examples along with animations have made the concept really very easy to understand.