Python Institute PCED-30-01 Practice Exams
Last updated on Oct 22,2026- Exam Code: PCED-30-01
- Exam Name: Certified Entry-Level Data Analyst with Python
- Certification Provider: Python Institute
- Latest update: Oct 22,2026
What is the formula for calculating the standard deviation of a population?
- A . sqrt(S(x – m)^2 / N)
- B . sqrt(S(x – m)^2 / (N-1))
- C . S(x – m) / N
- D . S(x – m) / (N-1)
In the context of machine learning, what is the process of training a model on a dataset called?
- A . Supervised learning
- B . Unsupervised learning
- C . Deep learning
- D . Model fitting
What does the "range()" function in Python do?
- A . Generates a list of numbers
- B . Filters elements in a list
- C . Returns the length of a list
- D . Reverses the order of elements in a list
When visualizing categorical data, which type of visualization is best suited for showing frequencies or proportions of different categories?
- A . Histogram
- B . Box plot
- C . Pie chart
- D . Violin plot
Which method is used to reduce the dimensionality of a dataset by transforming variables into lower-dimensional components?
- A . Feature scaling
- B . K-means clustering
- C . Principal Component Analysis
- D . Logistic regression
What is the output of the following Python code snippet? “`python print(5 / 2) “`
- A . 2.5
- B . 2
- C . 2.0
- D . 2.2
Which of the following is NOT a common method for data acquisition?
- A . Web scraping
- B . Data preprocessing
- C . API integration
- D . Database querying
Which of the following libraries in Python can be used for creating interactive visualizations?
- A . matplotlib
- B . Seaborn
- C . Plotly
- D . Pandas
In the context of data acquisition, what does ETL stand for?
- A . Extract, Transform, Load
- B . Extract, Transfer, Load
- C . Edit, Transform, Load
- D . Enhance, Transform, Load
What is the goal of data modeling in the field of data analytics?
- A . To organize data
- B . To analyze data
- C . To make predictions based on data
- D . To clean data