Practice Free PCED-30-01 Exam Online Questions
Question #61
Which of the following is an advantage of using interactive plots for data visualization?
- A . Limited user engagement
- B . Ability to zoom, pan, and interact with data
- C . Fixed visual display
- D . Slow rendering speed
Correct Answer: B
Question #62
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’]
Correct Answer: D
Question #63
Question #64
What is the purpose of cross-validation in model evaluation?
- A . To split the data into training and test sets
- B . To reduce overfitting of the model
- C . To assess the model’s performance on unseen data
- D . To visualize the relationship between variables
Correct Answer: C
Question #65
In data pre-processing, what is the term used to describe handling missing values in a dataset?
- A . Feature Engineering
- B . Data Normalization
- C . Data Augmentation
- D . Imputation
Correct Answer: D
Question #66
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
Correct Answer: A
Question #67
Which function in Matplotlib can be used to create a scatter plot?
- A . barplot()
- B . scatter()
- C . lineplot()
- D . histogram()
Correct Answer: B
Question #68
Which of the following visualization libraries in Python is commonly used for creating interactive plots and dashboards?
- A . Matplotlib
- B . Seaborn
- C . Plotly
- D . Pandas
Correct Answer: C
Question #69
In data analysis, what is the purpose of hypothesis testing?
- A . To visualize data
- B . To summarize data
- C . To test relationships between variables
- D . To clean data
Correct Answer: C
Question #70
In Python, what does the ‘==’ operator do?
- A . Checks if two values are equal
- B . Assigns a value to a variable
- C . Checks if a number is odd or even
- D . Multiplies two numbers
Correct Answer: A