D204: The Data Analytics Journey UPDATED Actual Exam Questions and CORRECT Answers
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D204: The Data Analytics Journey
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D204: The Data Analytics Journey
D204: The Data Analytics Journey
UPDATED Actual Exam Questions and
CORRECT Answers
Data scientists are able to find ______, _________, and _____ in unstructured data. -
CORRECT ANSWER- order, meaning, and value
What is involved in the planning phase? - CORRECT ANSWER- 1. Defining goals
2. Or...
D204: The Data Analytics Journey
UPDATED Actual Exam Questions and
CORRECT Answers
Data scientists are able to find ______, _________, and _____ in unstructured data. -
CORRECT ANSWER- ✔✔order, meaning, and value
What is involved in the planning phase? - CORRECT ANSWER- ✔✔1. Defining goals
2. Organizing resources
3. Coordinate people
4. Schedule project
What is involved in the wrangling phase? - CORRECT ANSWER- ✔✔5. Get data
6. Clean data
7. Explore data
8. Refine data
What is involved in the Modeling phase? - CORRECT ANSWER- ✔✔9. Create model
10. Validate model
11. Evaluate model
12. Refine model
What is involved in the Applying phase? - CORRECT ANSWER- ✔✔13. Present model
14. Deploy model
15. Revisit model
16. Archive assets
____________________ are programming languages that are very frequently used for data
manipulation and modeling. - CORRECT ANSWER- ✔✔Python or R
,___________ are general-purpose languages that are used for the back end, the foundational
elementsterm-26 of data science, and they provide maximum speed. - CORRECT ANSWER-
✔✔C, and C++, and Java
____________________ is a language for working with relational databases to do queries
and data manipulation. - CORRECT ANSWER- ✔✔SQL
What does SQL stand for? - CORRECT ANSWER- ✔✔structured query language
This is where you actually create the statistical model and you do the linear regression. You
do the decision tree. You do the deep learning neural network. - CORRECT ANSWER-
✔✔Modeling
These are the developers, and the system architects, the people who focus on the hardware
and the software that make data science possible - CORRECT ANSWER- ✔✔Data engineers
This is the phase of collecting data. - CORRECT ANSWER- ✔✔Data acquisition
Which phase? - Working with stakeholders to help them ask better questions so that both they
and you understand the outcome. - CORRECT ANSWER- ✔✔Discovery
What are the 4 parts of data analytics cycle? - CORRECT ANSWER- ✔✔Planning,
Wrangling, Modeling and Applying
This phase is also known as the discovery phase. During this phase, an analyst defines the
major questions of interest that need to be answered, understand the needs of the
stakeholders, and assess the resource constraints in the project. - CORRECT ANSWER-
✔✔Business understanding
____________________ is the person who champions the vision of the project and has the
authority to allocate resources. - CORRECT ANSWER- ✔✔The project sponsor
__________________ is responsible for making sure things get done on time and within
budget and removes roadblocks. - CORRECT ANSWER- ✔✔Project manager
,___________ is when new requirements are added to the project that increases the
time/resources needed to complete it. - CORRECT ANSWER- ✔✔Scope creep
What are the 3 types of analysis? - CORRECT ANSWER- ✔✔Descriptive, Predictive,
Prescriptive
___________________________ describes the data that is present. Mean, Median, Mode,
counting things. How many of each size and color of shirt were sold in the last month? Do we
sell more shirts in the summer vs winter? - CORRECT ANSWER- ✔✔Descriptive analysis
____________________ makes predictions about future state of business. Forecasting
volumes for example. Based on last summer and winter, what will we sell next year? -
CORRECT ANSWER- ✔✔Predictive analytics
_______________________ analysis with an end goal of making a recommendation. What
colors and sizes of shirts should we sell to maximize profits? - CORRECT ANSWER-
✔✔Prescriptive analytics
______________________ is just looking at any variable over time - CORRECT ANSWER-
✔✔Time series analysis
____________________ is a programing language that is specific to statistics. It also has
capabilities to visualize data. - CORRECT ANSWER- ✔✔R
_______________ is a multipurpose programing language that has libraries that extend its
capabilities to do statistical analysis. - CORRECT ANSWER- ✔✔Python
______________________ are platforms that specialize in visualization. This is where you
can make graphs and charts for presentations and data storytelling to executive leaders. -
CORRECT ANSWER- ✔✔Tableau and Power BI
_______________________ are instant messaging platforms that facilitate in a faster, but
less formal, way than email. - CORRECT ANSWER- ✔✔Teams, Slack
, An European union law regulating their citizens must have informed consent and ability to
request or delete their own data that you collect. - CORRECT ANSWER- ✔✔GDPR
When the researching organization consciously ignores data that calls their results into
question or only presents one side of the results that puts them in a positive light. -
CORRECT ANSWER- ✔✔Conflict of interest
Sometimes data might not be available and the analyst will use tools such as web scraping or
surveys to acquire it during which phase? - CORRECT ANSWER- ✔✔Data aquisition
The ____________ states that the sampling distribution of the sample means approaches a
normal distribution as the sample size gets larger (if you were to take 50 people out of that
population and get the mean, then take another 50 random people and get their mean age, and
so forth, all of those means would follow the normal distribution (bell curve)). - CORRECT
ANSWER- ✔✔Central Limit Theorem
In this phase, the analyst begins to understand the basic nature of data and the relationships
within it. This phase often relies on the use of data visualization tools and numerical
summaries, such as measures of central tendency and variability. - CORRECT ANSWER-
✔✔Data Exploration
__________________ enables an analyst to move beyond describing the data to creating
models that enable predicting outcomes of interest. - CORRECT ANSWER- ✔✔Predictive
Modeling
Tools such as _______________ play an important role in automating the training and using
of models. - CORRECT ANSWER- ✔✔Python and R
In this phase, an analyst tells the story of the data and uses graphs or interactive dashboards to
inform others of the findings from the analyses. - CORRECT ANSWER- ✔✔Reporting and
Visualization
Even if you have a wide spread of a variable, let's say, age in a population, and you take lots
of sample groups, the mean age of those sample groups would tend to have a normal
distribution. - CORRECT ANSWER- ✔✔Central Limit theorem
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