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Python Institute PCED - Certified Entry-Level Data Analyst with Python Sample Questions:

1. A Python developer is testing truth values of different data types using the bool() function. The expression bool([0]) is evaluated in the script. What result should be expected when this expression is printed?

A) True
B) None
C) False
D) Error

2. How do the analysis and visualization stages of the data lifecycle typically work together?

A) Analysis summarizes archived data, and visualization transforms it into structured tables for storage.
B) Analysis identifies patterns and insights in processed data, which are then communicated through visualizations for informed decision-making.
C) Analysis produces charts and graphs, while visualization interprets the data to detect outliers.
D) Analysis retrieves raw inputs from dashboards, while visualization uses that input to clean the data.

3. The following chart shows how a student spends 24 hours in a day:

Which statements are most accurate? (Choose two.)

A) Leisure and meals combined equal the time spent at school.
B) Commuting is the second most time-consuming activity.
C) School and homework together take up half of the day's time.
D) Leisure accounts for a moderate portion of the student's daily schedule, larger than commuting but smaller than the time spent at school.
E) More time is spent commuting than on leisure.
F) Sleep and school take up the majority of time in a day.

4. You are analyzing survey results from students about their favorite colors. The list colorsstores individual responses:

You want to:
- find the number of unique colors mentioned using NumPy, and
- determine how often each color was chosen using Counter.
Which code snippet correctly performs both tasks? Select the best answer.
from numpy import unique

A) from collections import Counter
unique_colors = Counter(colors)
color_counts = sum(np.unique(colors))
import numpy as np
B) from collections import Counter
unique_colors = len(unique(colors))
color_counts = Counter(colors)
import numpy as np
C) from collections import Counter
unique_colors = len(set(colors))
color_counts = np.unique(colors)
D) from collections import Counter
unique_colors = np.unique(colors)
color_counts = Counter(set(colors))
import numpy as np

5. Which of the following statements about Python functions are correct? (Choose two.)

A) Positional arguments must be passed in the order defined, while keyword arguments can be passed in any order using their parameter names.
B) Functions can only return numeric values or strings.
C) Default parameters must always come before required ones in the parameter list.
D) If a function does not contain a returnstatement, it returns Noneby default.
E) A function cannot call itself or be passed as an argument to itself.
F) passexecutes the function body and returns its result.

Solutions: