Question answering is a fascinating application of Natural Language Processing (or NLP). Imagine having a digital assistant that can sift through vast amounts of information and provide accurate answers to our questions, much like our brains process information from a textbook and recall it during an exam. QA systems harness the power of deep learning to understand and interpret human language. When you ask a question, the system taps into its trained knowledge base. It then uses its understanding of language, gained from training on massive datasets, to generate a relevant answer.