JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III INTRODUCTION TO DATA SCIENCE Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is data science?
Answer
Data science is an interdisciplinary field that uses scientific methods, processes, algorithms, and systems to extract knowledge and actionable insights from structured and unstructured data. It integrates statistics, computer science, and domain expertise to solve complex analytical problems.
Explain basic datatypes in R.
Answer
The basic data types in R include:
- Numeric: Represents real numbers (e.g., 10.5, 5).
- Integer: Represents whole numbers (e.g., 5L).
- Character: Represents text strings (e.g., "Data").
- Logical: Represents boolean values (TRUE or FALSE).
- Complex: Represents numbers with an imaginary part (e.g., 1+4i).
Write any two ordinal attributes with example.
Answer
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How to calculate standard deviation for any data?
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What is vector?
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What is List? How does it differ from vector?
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List out Mathematical Functions in R.
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How do you write a function in R?
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Write importance of data reduction strategies.
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Explain Regression mechanism with example.
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Part B
Demonstrate how to setup R- Environment with example.
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What is a Model? Explain how to fitting a model with example.
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Explain probability distributions with example in data science.
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What is Mean, Median, and Mode? Explain with example.
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Explain Range, Quartiles with example.
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Explain graphic displays of basic statistical descriptions of data.
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Describe how to process Attributes by the Number of Values?
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Explain vector arithmetic operations with example.
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What is factor Levels? How to summarizing a Factor level.
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What is Data Frame? Explain data frame with example.
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Explain how to converting Lists to Vectors process.
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Demonstrate Logical Operators and Vectors with example programs.
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Write a Program to display numbers from 1 to 5 using for loop.
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What is Nested function? Write nested functions usage with example.
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What is Recursion? Explain recursion with sample program.
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Illustrate the purpose of Principal Component Analysis? Explain with example.
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Explain various geometric projection visualization techniques.
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Demonstrate data Cube Aggregation with example.
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Explain importance of Icon-Based Visualization Techniques.
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