WorksheetsData Science Quizz
Total questions: 14
Worksheet time: 16mins
What is the main purpose of data science?
Data analysis
Data visualization
Machine learning
All of the above
Which of the following is performed by Data Scientist ?
Define the question
Create reproducible code
Challenge results
All of the Mentioned
Point out the correct statement:
Raw data is original source of data
Preprocessed data is original source of data
Raw data is the data obtained after processing steps
None of the Mentioned
Which of the following is the top most important thing in data science ?
answer
question
data
none of the Mentioned
Q1. Which of the following is the most accurate definition of data science?
a) Data science is extracting meaning from large data sets in order to provide insights to support decision-making
b) Data science is using computers to analyse data and to perform calculations on the data to produce information
c) Data science is performing experiments and recording the data produced by those experiments
d) Data science is writing code to make sure that any inaccuracies in data sets are spotted and removed (cleaned)
Q2. Which of the following best describes a data visualisation?
A. Presenting related data so that a user can see individual items of data
B. Making sure that data is accessible and that no data is hidden
C. A visual representation that communicates relationships among the data
D. A collection of graphs that tell a story when put together
Q15. What is name of the chart pictured below? (1 mark)
Graph chart
Pie chart
Line chart
Bar chart
Q17. What is name of the chart pictured below? (1 mark)
Graph chart
Pie chart
Line chart
Bar chart
which technology is specifically used for managing relational databases?
Answer choices
Python
SQL
Tableau
Hadoop
Which library is commonly used for data manipulation in Python
Numpy
Pandas
Matplotlib
Scikit-learn
What is the purpose of data cleaning?
To make data look nice
To remove errors and inconsistencies from data
To store data securely
To analyze data
What is a dataset?
A collection of data
A type of algorithm
A programming language
A data visualization tool
What is a "null value" in a dataset?
A value that is zero
missing or undefined value
A placeholder for future data
A duplicate value
What does the term "machine learning" refer to?
Teaching machines to perform tasks
Machines learning from data
Machines replacing humans
All of the above
