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
Which of the following libraries in Python is commonly used for creating interactive visualizations?
- A . NumPy
- B . Pandas
- C . Matplotlib
- D . Scikit-learn
In data visualization, what is the purpose of adding annotations to a chart or graph?
- A . To make the chart more colorful
- B . To add text descriptions to data points
- C . To show categorical data
- D . To adjust the size of the chart
Which statistical analysis technique is used to compare the means of more than two groups?
- A . t-test
- B . ANOVA
- C . Regression analysis
- D . Chi-square test
When performing data pre-processing, what is the purpose of data cleaning?
- A . To remove unwanted observations or errors from the data
- B . To aggregate data into groups or categories
- C . To transform data into a standard format
- D . To compute summary statistics from the data
What is the purpose of hyperparameter tuning in machine learning models?
- A . To adjust the learning rate of the model
- B . To increase the number of training iterations
- C . To optimize model performance by tuning model parameters
- D . To remove irrelevant features from the dataset
Which of the following is NOT a commonly used data acquisition method?
- A . Web scraping
- B . API integration
- C . Data visualization
- D . Manual data entry
Which of the following is used to measure the strength and direction of the linear relationship between two variables?
- A . Pearson correlation coefficient
- B . Spearman rank correlation coefficient
- C . Kendal’s tau
- D . Point-biserial correlation coefficient
What is the main purpose of statistical analysis in data analytics?
- A . To organize data
- B . To visualize data
- C . To draw conclusions from data
- D . To collect data
What does the ‘split()’ method do when called on a string in Python?
- A . Joins multiple strings together
- B . Splits a string into a list based on a specified delimiter
- C . Reverses the characters in a string
- D . Removes all spaces from a string
What is the purpose of regression analysis in statistical analysis?
- A . To summarize the data
- B . To determine cause and effect relationships
- C . To identify trends over time
- D . To calculate probabilities