Question 1

Which of the following refers to a technique that groups similar data points together based on certain characteristics?

Accepted Answer

Clustering

Answer

Regression

Answer

Time series analysis

Answer

Sequential analysis

Question 2

What is the primary purpose of data cleaning in data analysis?

Accepted Answer

To improve data quality

Answer

To store data

Answer

To collect data

Answer

To visualize data

Question 3

What term describes a dataset that is too large to be processed by traditional data processing tools?

Accepted Answer

Big data

Answer

Static data

Answer

Small data

Answer

Moderate data

Question 4

What technique do data analysts use to fill in missing values in a dataset?

Accepted Answer

Imputation

Answer

Aggregation

Answer

Clustering

Answer

Normalization

Question 5

What do we call a visual representation of data intended to show the relationship between variables?

Accepted Answer

Scatter plot

Answer

Line graph

Answer

Bar chart

Answer

Pie chart

Question 6

Which method do data analysts commonly use to summarize and analyze the distribution of a dataset?

Accepted Answer

Descriptive statistics

Answer

Data mining

Answer

Regression analysis

Answer

Predictive modeling

Question 7

What is the purpose of a correlation coefficient in data analysis?

Accepted Answer

To measure the strength and direction of a relationship between two variables

Answer

To classify data into categories

Answer

To visualize data trends

Answer

To calculate averages

Question 8

Which of the following techniques is used to find relationships between variables in a dataset?

Accepted Answer

Correlation analysis

Answer

Data validation

Answer

Data compression

Answer

Data normalization

Question 9

What does 'ETL' stand for in data processing?

Accepted Answer

Extract, Transform, Load

Answer

Evaluate, Train, Link

Answer

Edit, Transfer, Log

Answer

Encrypt, Transfer, Load

Question 10

What is the purpose of a pivot table in data analysis?

Accepted Answer

To summarize large amounts of data

Answer

To clean data

Answer

To run complex algorithms

Answer

To create visual dashboards

Question 11

What is the primary purpose of data cleaning in data analysis?

Accepted Answer

To improve data quality

Answer

To visualize data trends

Answer

To perform statistical tests

Answer

To increase data volume

Question 12

What is the purpose of the SQL JOIN clause?

Accepted Answer

To combine rows from two or more tables based on a related column

Answer

To update existing records

Answer

To insert new data into a table

Answer

To create a new database

Question 13

Which SQL clause is used to sort the result set of a query?

Accepted Answer

ORDER BY

Answer

ARRANGE BY

Answer

GROUP BY

Answer

SORT BY

Question 14

Which SQL function is used to calculate the total number of rows in a table?

Accepted Answer

COUNT

Answer

SUM

Answer

ADD

Answer

TOTAL

Question 15

What clause is used to filter records in a SQL query?

Accepted Answer

WHERE

Answer

FILTER

Answer

SELECT

Answer

HAVING

Question 16

Which SQL keyword is used to prevent duplicate records from appearing in the result set?

Accepted Answer

DISTINCT

Answer

UNIQUE

Answer

SINGLE

Answer

FILTER

Question 17

Which SQL statement is used to extract data from a database?

Accepted Answer

SELECT

Answer

GET

Answer

PULL

Answer

EXTRACT

Question 18

Which function is used in SQL to find the highest value in a set of values?

Accepted Answer

MAX

Answer

LARGEST

Answer

HIGHEST

Answer

TOP

Question 19

What does the VLOOKUP function do in Excel?

Accepted Answer

Looks up a value in a table and returns a corresponding value from a specified column

Answer

Counts unique values in a range

Answer

Sorts data in ascending order

Answer

Calculates the sum of a range

Question 20

In Excel, which of the following functions can be used to retrieve data from a specified row and column in a table?

Accepted Answer

INDEX

Answer

LOOKUP

Answer

SEARCH

Answer

MATCH

Question 21

In Excel, what function would you use to combine text from multiple cells into one cell?

Accepted Answer

CONCATENATE

Answer

MERGE

Answer

JOIN

Answer

SPLIT

Question 22

Which Excel function is used to return a value based on a condition, performing a logical test?

Accepted Answer

IF

Answer

COUNTIF

Answer

SUMIF

Answer

VLOOKUP

Question 23

In Excel, which of the following tools would you use to summarize large amounts of data quickly?

Accepted Answer

PivotTable

Answer

Data Filter

Answer

Sort

Answer

Conditional Formatting

Question 24

Which of the following is a data transformation tool integrated within Power BI?

Accepted Answer

Power Query

Answer

Power Pivot

Answer

Power Automate

Answer

Power Shell

Question 25

What feature in Power BI allows you to visualize data in an interactive map?

Accepted Answer

Map visualizations

Answer

Table visualizations

Answer

Matrix visualizations

Answer

Card visualizations

Question 26

What feature in Power BI allows users to create dynamic reports based on different selections?

Accepted Answer

Slicers

Answer

Filters

Answer

Bookmarks

Answer

Drillthroughs

Question 27

What is the primary benefit of using a dashboard in Power BI?

Accepted Answer

Real-time data monitoring

Answer

Data modeling

Answer

Data extraction

Answer

Data storage

Question 28

Which feature in Power BI allows users to create calculated columns using DAX expressions?

Accepted Answer

Data Analysis Expressions (DAX)

Answer

Chart Wizard

Answer

Power Query Editor

Answer

Reporting Services

Question 29

What is the primary function of the 'Data Model' in Power BI?

Accepted Answer

To organize and analyze data from multiple sources

Answer

To create simple visuals

Answer

To write queries

Answer

To generate reports

Question 30

What is the purpose of the 'Relationships' feature in Power BI?

Accepted Answer

To connect different data tables

Answer

To apply themes

Answer

To schedule data refresh

Answer

To create visualizations

Question 31

What is the default starting point of indexing in MATLAB?

Accepted Answer

1

Answer

0

Answer

2

Answer

-1

Question 32

Which command in MATLAB is used to create a new figure window?

Accepted Answer

figure

Answer

subplot

Answer

newfig

Answer

plot

Question 33

What is the purpose of the 'clear' command in MATLAB?

Accepted Answer

To remove variables from the workspace

Answer

To close figure windows

Answer

To reset the command window

Answer

To save the current workspace

Question 34

Which command is used in MATLAB to create a subplot in a figure window?

Accepted Answer

subplot

Answer

panel

Answer

subfigure

Answer

grid

Question 35

In MATLAB, which function is used to read data from a text file?

Accepted Answer

readtable

Answer

fopen

Answer

load

Answer

importdata

Question 36

Which MATLAB function calculates the Fast Fourier Transform (FFT) of a signal?

Accepted Answer

fft

Answer

ifft

Answer

dft

Answer

ftt

Question 37

What command is used to plot data in a 2D Cartesian plane in MATLAB?

Accepted Answer

plot

Answer

scatter

Answer

graph

Answer

chart

Question 38

What symbol is used in MATLAB to denote element-wise multiplication?

Accepted Answer

.*

Answer

%

Answer

&

Answer

*

Question 39

Which MATLAB function is used to calculate the eigenvalues and eigenvectors of a matrix?

Accepted Answer

eig

Answer

valuevector

Answer

eigen

Answer

matrixcalc

Question 40

Which command would you use in MATLAB to load a dataset from a .mat file?

Accepted Answer

load

Answer

read

Answer

open

Answer

import

Question 41

In MATLAB, which function is used to compute the transpose of a matrix?

Accepted Answer

'

Answer

transpose

Answer

rev

Answer

flip

Question 42

In MATLAB, which function is commonly used to create a mesh grid for 3D surface plots?

Accepted Answer

meshgrid

Answer

gridmesh

Answer

surfacegrid

Answer

plotgrid

Question 43

Which MATLAB function is used to sort the elements of an array in ascending order?

Accepted Answer

sort

Answer

arrange

Answer

sequence

Answer

order

Question 44

Which function in MATLAB is used to find the roots of a polynomial given its coefficients?

Accepted Answer

roots

Answer

solutions

Answer

findroots

Answer

polyroot

Question 45

What role does data visualization play in advanced data analysis?

Accepted Answer

It helps to communicate complex data insights in an understandable way.

Answer

It replaces the need for statistical analysis.

Answer

It complicates the understanding of data patterns.

Answer

It increases the amount of raw data collected.

Question 46

What is the primary purpose of predictive analytics in advanced data analysis?

Accepted Answer

To forecast future events based on historical data.

Answer

To only summarize past data without insights.

Answer

To discard unreliable data regardless of context.

Answer

To ensure absolute certainty in future outcomes.

Question 47

What is a key advantage of utilizing cloud computing for advanced data analysis?

Accepted Answer

Scalability of resources on demand.

Answer

Reduced accessibility from remote locations.

Answer

Limitation to on-premise data storage.

Answer

Increased physical hardware costs.

Question 48

What is the purpose of using algorithms in advanced data analysis?

Accepted Answer

To process and analyze data in a systematic way.

Answer

To eliminate the need for data entirely.

Answer

To solely increase the amount of collected data.

Answer

To make data storage more complex.

Question 49

In the context of advanced data analysis, what does the term 'data mining' refer to?

Accepted Answer

The process of discovering patterns and knowledge from large amounts of data.

Answer

Visualizing data through charts only.

Answer

Collecting data from social media.

Answer

Storing data on physical drives.

Question 50

What is a primary benefit of using advanced data analysis techniques in business decision-making?

Accepted Answer

It allows for more accurate forecasting of trends.

Answer

It guarantees 100% accuracy in predictions.

Answer

It eliminates the need for human input.

Answer

It reduces the amount of data needed.

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