D467 - Exploring Data Exam 2025|2026 Actual Comprehensive
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Which statement is true about sampling, irrespective of sample
size?
The sample standard deviation (Stdev) is the same as the
population Stdev.
The sample distribution approximates to normal distribution.
The sample bias is reduced if the sample being selected is
representative of the population.
The sample mean approaches the population mean - ANSWER-
The sample bias is reduced if the sample being selected is
representative of the population.
A data analyst is performing analysis on data stored in a big
data platform with state-of-the-art analysis tools. Insufficient
sample size is rendering the current analysis ineffective. What
is the primary challenge of a larger sample size?
Collecting a larger sample size is more expensive.
Analyzing a larger sample size is complex.
Storing a larger sample size is difficult.
,Cleansing a larger sample size is complicated. - ANSWER-
Collecting a larger sample size is more expensive.
In the next six months, an analyst is expected to analyze and
present the effects of monthly promotions on sales of a new
product released one month ago. Which solution for
insufficient data should this analyst pursue?
Look for a new data set
Identify trends with available data
Speak with stakeholders and adjust the objective
Wait for more data - ANSWER-Wait for more data
A team leader is assigned the task of evaluating the schema
of a data set as
part of data cleansing. How would the team leader define a
schema to the
analyst collaborating on the project prior to
commencing cleansing?
How well two or more data sets work together
A way of describing how something is organized
A process of combining two or more data sets into a single
data set
A way of matching fields in separate databases - ANSWER-A
way of describing how something is organized
An analyst performing data cleansing on invoice data would
like to select and
,view rows that have an amount paid that is greater than
$100. Which
spreadsheet functionality should the
analyst use?
COUNTIF
Conditional
formatting
Filter
Remove duplicates -
ANSWER-Filter
Why is clean data critical for data analysis?
It ensures data drives the decision the analyst intends to
communicate.
It ensures data used for analysis reflects operational reality.
It ensures data is structured to enable effective analysis.
It ensures data is visualized to make decisions. - ANSWER-It
ensures data used for analysis reflects operational reality.
What does an UPDATE statement do after execution in
Structured Query
Language
(SQL)?
Modifies values in certain cells of a table based on conditions
Inserts new rows into the table based on data provided in the
query
, Removes tables based on the query
Creates a temporary table to be downloaded for analysis and
visualization - ANSWER-Modifies values in certain cells of a
table based on conditions
An analyst wants to extract data from a table by filtering for
certain conditions prior to performing data cleansing. Which
Structured Query Language (SQL) statement will perform this
function?
LENGTH statement
DISTINCT statement
TRIM statement
WHERE statement - ANSWER-WHERE statement
An analyst wants to combine the fields for city and state into a
single field prior
to extraction for data cleansing. Which Structured Query
Language (SQL)
statement will perform this
function?
CONCAT statement
CAST statement
ORDER BY statement
COALESCE statement - ANSWER-CONCAT statement
Real Exam Questions & Correct Answers (Verified Answers) |
Get It 100% Accurate!! Already Graded A+ | Newest Exam |
Just Released!!
Which statement is true about sampling, irrespective of sample
size?
The sample standard deviation (Stdev) is the same as the
population Stdev.
The sample distribution approximates to normal distribution.
The sample bias is reduced if the sample being selected is
representative of the population.
The sample mean approaches the population mean - ANSWER-
The sample bias is reduced if the sample being selected is
representative of the population.
A data analyst is performing analysis on data stored in a big
data platform with state-of-the-art analysis tools. Insufficient
sample size is rendering the current analysis ineffective. What
is the primary challenge of a larger sample size?
Collecting a larger sample size is more expensive.
Analyzing a larger sample size is complex.
Storing a larger sample size is difficult.
,Cleansing a larger sample size is complicated. - ANSWER-
Collecting a larger sample size is more expensive.
In the next six months, an analyst is expected to analyze and
present the effects of monthly promotions on sales of a new
product released one month ago. Which solution for
insufficient data should this analyst pursue?
Look for a new data set
Identify trends with available data
Speak with stakeholders and adjust the objective
Wait for more data - ANSWER-Wait for more data
A team leader is assigned the task of evaluating the schema
of a data set as
part of data cleansing. How would the team leader define a
schema to the
analyst collaborating on the project prior to
commencing cleansing?
How well two or more data sets work together
A way of describing how something is organized
A process of combining two or more data sets into a single
data set
A way of matching fields in separate databases - ANSWER-A
way of describing how something is organized
An analyst performing data cleansing on invoice data would
like to select and
,view rows that have an amount paid that is greater than
$100. Which
spreadsheet functionality should the
analyst use?
COUNTIF
Conditional
formatting
Filter
Remove duplicates -
ANSWER-Filter
Why is clean data critical for data analysis?
It ensures data drives the decision the analyst intends to
communicate.
It ensures data used for analysis reflects operational reality.
It ensures data is structured to enable effective analysis.
It ensures data is visualized to make decisions. - ANSWER-It
ensures data used for analysis reflects operational reality.
What does an UPDATE statement do after execution in
Structured Query
Language
(SQL)?
Modifies values in certain cells of a table based on conditions
Inserts new rows into the table based on data provided in the
query
, Removes tables based on the query
Creates a temporary table to be downloaded for analysis and
visualization - ANSWER-Modifies values in certain cells of a
table based on conditions
An analyst wants to extract data from a table by filtering for
certain conditions prior to performing data cleansing. Which
Structured Query Language (SQL) statement will perform this
function?
LENGTH statement
DISTINCT statement
TRIM statement
WHERE statement - ANSWER-WHERE statement
An analyst wants to combine the fields for city and state into a
single field prior
to extraction for data cleansing. Which Structured Query
Language (SQL)
statement will perform this
function?
CONCAT statement
CAST statement
ORDER BY statement
COALESCE statement - ANSWER-CONCAT statement
