Free download Python Institute certification PCED-30-02 exam questions and answers

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Python Institute PCED-30-02 Exam Syllabus Topics:

Section	Objectives
Data Handling and Processing with Python	- Data manipulation libraries 1. Pandas fundamentals 2. NumPy basics - Working with data structures 1. Lists, tuples, dictionaries 2. Iterating and transformations
Data Analysis and Visualization	- Data cleaning and preprocessing 1. Missing values handling 2. Data transformation techniques - Data visualization 1. Plot interpretation 2. Matplotlib basics
Python Programming Fundamentals	- Basic syntax and data types 1. Variables and operators 2. Control flow basics
Basic Statistics for Data Analysis	- Descriptive statistics 1. Mean, median, mode 2. Variance and standard deviation

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Python Institute PCED - Certified Entry-Level Data Analyst with Python Sample Questions (Q36-Q41):

NEW QUESTION # 36
Which of the following statements about Python functions are correct? (Choose two.)

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

Answer: C,D

Explanation:
Positional arguments are matched to parameters by their position, so they must follow the defined order, while keyword arguments are matched by name and can be provided in any order. If a function completes without an explicit return statement, Python returns None automatically.

NEW QUESTION # 37
A health researcher uses wearable devices to record physical activity and sends a survey to randomly selected participants across age groups.
Why can this approach be effective? Select the best answer.

A. It relies on observational methods, which are more accurate than surveys or sensors.
B. It limits sampling to one demographic, ensuring high-quality data within a specific group.
C. It combines automated data collection with representative sampling, reducing the risk of bias.
D. It uses unstructured interviews to validate automated tracking, improving bias detection.

Answer: C

Explanation:
Combining automated wearable data with a randomly selected survey sample integrates objective measurements with representative participant input, which helps reduce bias and improves the reliability and generalizability of the findings.

NEW QUESTION # 38
A variable is assigned using chained assignment: a = b = c = 10. The developer then changes b =
5. What will be the value of a after this operation?

A. Error
B. 0
C. None
D. 1

Answer: D

Explanation:
Integers are immutable in Python. Reassigning b to a new value does not affect a or c, which still reference the original integer value 10.

NEW QUESTION # 39
You want to safely read the contents of a file named records.txtand store them in a list. Your requirements are:
- The file should be automatically closed after reading,
- The code should check whether the file exists before opening it, and
- It should handle missing file errors gracefully.
Which of the following is the most appropriate way to accomplish this task in Python? Select the best answer.

Answer: C

Explanation:
It uses a context manager to automatically close the file after reading and wraps the operation in a try-except block to gracefully handle a missing file error, assigning an empty list if the file is not found.

NEW QUESTION # 40
A list is reversed using slicing: lst[::-1]. The programmer wants to confirm whether this modifies the original list or creates a new one. What is the correct behavior?

A. Error
B. Modifies original
C. Returns None
D. Creates new list

Answer: D

Explanation:
Slicing creates a new list object rather than modifying the original. The expression lst[::-1] returns a reversed copy, leaving the original list unchanged.

NEW QUESTION # 41
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