Data Structure Interview Questions is a free Android app developed by Engineering Hub that covers all the essential concepts of data structure. The app aims to help students prepare for exams, interviews, and competitive exams by providing them with a comprehensive set of questions and answers. The app covers all the topics related to data structure, including basic terminology, elementary data organization, structure operations, algorithm complexity, and time-space trade-off.

The app covers arrays, stacks, queues, linked lists, trees, searching and hashing, sorting, binary search trees, graphs, and file structures. It provides a detailed explanation of each topic, including array definition, representation and analysis, single and multidimensional arrays, address calculation, application of arrays, character string in C, character string operation, and much more. The app has an easy-to-use interface that allows users to navigate through the topics effortlessly. Overall, Data Structure Interview Questions is an excellent app for students who want to excel in data structure.