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Data Science Quizz

Total questions: 14

Worksheet time: 16mins

Name
Class
Date
1.

What is the main purpose of data science?

a)

Data analysis

b)

Data visualization

c)

Machine learning

d)

All of the above

2.

Which of the following is performed by Data Scientist ?

a)

Define the question

b)

Create reproducible code

c)

Challenge results

d)

All of the Mentioned

3.

Point out the correct statement:

a)

Raw data is original source of data

b)

Preprocessed data is original source of data

c)

Raw data is the data obtained after processing steps

d)

None of the Mentioned

4.

Which of the following is the top most important thing in data science ?

a)

answer

b)

question

c)

data

d)

none of the Mentioned

5.

Q1. Which of the following is the most accurate definition of data science?

a)

a) Data science is extracting meaning from large data sets in order to provide insights to support decision-making

b)

b) Data science is using computers to analyse data and to perform calculations on the data to produce information

c)

c) Data science is performing experiments and recording the data produced by those experiments

d)

d) Data science is writing code to make sure that any inaccuracies in data sets are spotted and removed (cleaned)

6.

Q2. Which of the following best describes a data visualisation?

a)

A. Presenting related data so that a user can see individual items of data

b)

B. Making sure that data is accessible and that no data is hidden

c)

C. A visual representation that communicates relationships among the data

d)

D. A collection of graphs that tell a story when put together

7.

Q15. What is name of the chart pictured below? (1 mark)

a)

Graph chart

b)

Pie chart

c)

Line chart

d)

Bar chart

8.

Q17. What is name of the chart pictured below? (1 mark)

a)

Graph chart

b)

Pie chart

c)

Line chart

d)

Bar chart

9.

which technology is specifically used for managing relational databases?

Answer choices

a)

Python

b)

SQL

c)

Tableau

d)

Hadoop

10.

Which library is commonly used for data manipulation in Python

a)

Numpy

b)

Pandas

c)

Matplotlib

d)

Scikit-learn

11.

What is the purpose of data cleaning?

a)

To make data look nice

b)

To remove errors and inconsistencies from data

c)

To store data securely

d)

To analyze data

12.

What is a dataset?

a)

A collection of data

b)

A type of algorithm

c)

A programming language

d)

A data visualization tool

13.

What is a "null value" in a dataset?

a)

A value that is zero

b)

missing or undefined value

c)

A placeholder for future data

d)

A duplicate value

14.

What does the term "machine learning" refer to?

a)

Teaching machines to perform tasks

b)

Machines learning from data

c)

Machines replacing humans

d)

All of the above