What are the Dynamic arrays

Dynamic arrays are convenient for programmers since they can never be too small-whenever more space is needed in a dynamic array, it can simply be expanded. One drawback of dynamic arrays is that implementing language support for them is more work for compiler or interpreter writer. A potentially more serious drawback is that expansion procedure is expensive, so there are circumstances when using a dynamic array can be dangerous. For instance, if an application should respond in real time to events in its environment, and a dynamic array should be expanded when application is in the midst of a response, then the response may be delayed too long, causing problems.