Jawaharlal Nehru Technological University Hyderabad B.Tech III DATA SCIENCE Previous Question Paper (August - 2022 - R18)

Data Science is an interdisciplinary field that utilizes scientific methods, processes, algorithms, and systems to extract knowledge and actionable insights from structured and unstructured data. It integrates concepts from statistics, mathematics, computer science, and domain expertise to solve complex problems.

Its role is fundamental in modern decision-making by enabling organizations to:

• Identify patterns and trends that are not visible through traditional analysis.
• Predict future outcomes through predictive modeling and machine learning.
• Optimize business operations and improve efficiency.
• Personalize user experiences by analyzing behavioral data.
• Drive innovation by uncovering hidden opportunities within large datasets.

The Data Science process is an iterative lifecycle used to transform raw data into meaningful insights. It typically follows these key stages:

1. Problem Definition: Clearly defining the business objective or research question to be addressed.
2. Data Collection: Gathering relevant data from various sources such as databases, APIs, web scraping, or logs.
3. Data Cleaning and Preparation: The most time-consuming stage, involving handling missing values, removing duplicates, correcting inconsistencies, and formatting data for analysis.
4. Exploratory Data Analysis (EDA): Using statistical summaries and visualizations to understand data distributions, correlations, and outliers.
5. Data Modeling: Selecting and applying machine learning algorithms (e.g., regression, classification, clustering) to build predictive or descriptive models.
6. Model Evaluation: Assessing the performance of the model using metrics like accuracy, precision, recall, or RMSE to ensure it meets the defined objectives.
7. Deployment and Communication: Presenting findings to stakeholders through reports or dashboards and deploying the model into a production environment for real-time decision support.