Python Institute PCED-30-01 Practice Exams
Last updated on Oct 21,2026- Exam Code: PCED-30-01
- Exam Name: Certified Entry-Level Data Analyst with Python
- Certification Provider: Python Institute
- Latest update: Oct 21,2026
What is the purpose of data analysis in the context of data modeling?
- A . To clean and preprocess the data
- B . To visualize the data
- C . To identify patterns and relationships in the data
- D . To deploy machine learning models
In Python, how would you access the value ’42’ in a dictionary that has the key ‘answer’?
- A . dictionary[’42’]
- B . dictionary.get(‘answer’)
- C . dictionary.answer
- D . dictionary[‘answer’]
Which type of chart is best used to show the relationship between two numerical variables?
- A . Bar chart
- B . Line plot
- C . Scatter plot
- D . Pie chart
Why is data normalization important in data pre-processing?
- A . It helps in increasing the size of the dataset
- B . It ensures that all features have the same scale
- C . It makes the data difficult to interpret
- D . It slows down the data analysis process
Which of the following is NOT a commonly used tool for data acquisition and pre-processing?
- A . Python
- B . SQL
- C . Excel
- D . Tableau
In statistical analysis, what does the term "p-value" represent?
- A . The effect size of a study
- B . The probability of wrongly rejecting a true null hypothesis
- C . The confidence interval of a parameter estimate
- D . The level of significance in a hypothesis test
What is the purpose of the chi-square test in statistical analysis?
- A . To compare means of two independent groups
- B . To test the association between categorical variables
- C . To analyze variance among multiple groups
- D . To test for normality of data
Which statistical concept is used to assess the relationship between variables and make predictions in regression analysis?
- A . P-value
- B . Confidence interval
- C . R-squared
- D . Margin of error
Which library in Python can be used for data manipulation and cleaning tasks such as removing duplicates, handling missing values, and merging datasets?
- A . NumPy
- B . Pandas
- C . Scikit-learn
- D . Matplotlib
What is the p-value in hypothesis testing?
- A . The probability of making a Type I error
- B . The probability of making a Type II error
- C . The level of significance
- D . The probability of observing the test statistic