Easy-level python questions from real data engineering interviews.
These easy python questions are selected from real interviews at top companies. Each question includes a detailed expert answer and pro tip to help you nail your interview. This set leans toward fundamentals — 60 easy, 0 medium, and 0 hard questions. Recurring themes are python, spark, and sql — these patterns appear most often in real interviews and reward the deepest preparation. These questions have been reported across 39 companies including Altimetrik and Infosys. Average answer is around 2 minutes of reading — plan roughly 2 hours to work through the full set thoughtfully.
This collection contains 60 curated questions: 60 easy. There's a strong foundation of fundamentals-focused questions — ideal for building confidence before tackling advanced topics.
The most frequently tested areas in this set are python (25), spark (3), sql (2), and etl (1). Focusing on these topics will give you the highest return on your preparation time.
Start with the easy questions to warm up and solidify fundamentals. For each question, try answering before revealing the solution. Use our AI Mock Interview to simulate real interview conditions and get instant feedback on your responses.
What are traits in Scala, and how are they different from classes?
What is the difference between a list and a tuple in Python?
Explain the difference between shallow copy and deep copy in Python.
Write a Python function to find the first non-repeating character in a string.
What are decorators in Python, and how do they work?
Explain the difference between args and kwargs in Python.
Write a Python function to find the first non-repeating character in a string.
Explain the difference between a list and a tuple in Python.
How do you handle exceptions in Python? Provide an example.
What is the difference between shallow copy and deep copy in Python?
Write a Python function to find the first non-repeating character in a string.
What are decorators in Python, and how do they work?
Explain the difference between args and kwargs in Python.
What is the difference between a set and a list in Python?
How do you handle memory management in Python?
Write a Python function to find the maximum value in a list without using the built-in max() function.
Can you give an example of processing nested JSON data using these functions?
Concatenating lists within a range using list comprehensions
Convert a Binary Search Tree (BST) into a skewed tree in either increasing or decreasing order
Convert a sorted array into a Binary Search Tree
Convert the list [1, [2, 3], 4, 5, 6, [7, 8, 9]] to a single list [1, 2, 3, 4, 5, 6, 7, 8, 9].
Count of Alphabets in String
Create a dictionary with list elements as keys and their occurrences as values.
Create a function to detect anomalies in sales trends using Pandas and NumPy.
Create a script to parse and transform a JSON file into a structured CSV.
DSA: Array-based problem - brute-force and optimized solutions
Describe script implementation and deployment.
Detect a loop in a singly linked list
Develop a Python script to clean data by removing duplicates and handling missing values.
Differences between Stack, Queue, and Linked List
Discuss the tech stacks and responsibilities at Morgan Stanley
Explain Lambda functions in Python.
Explain Stack vs Unstack and their use in data transformation.
Explain and implement Semaphore in Java
Explain techniques for ensuring data quality in cross-functional team scenarios
Explain the difference between mutable and immutable objects in Python.
Explain the differences between multiprocessing and multithreading.
Explain the internal working of a HashMap
Explain this code: [f(2) for f in [lambda x: x * i for i in range(5)]].
Fibonacci Series Problem - solve using brute force and optimized approaches
Find pairs with sum X from a list of numbers
Find the Lowest Common Ancestor (LCA) in a Binary Tree.
Find the minimum and maximum values in an array
Find the next greatest element in a linked list.
Find the three numbers from a list whose multiplication equals 180
Finding Complete String Pairs - identify pairs of strings that when concatenated contain all 26 English alphabets
Flatten nested lists recursively using Python
Garbage Collector in Python - explain
Given a list of integers, write a Python function to return the number of unique pairs that sum up to a target.
Given a list of intervals, merge the overlaps. How do you optimize it?
Given a string 'AAAVGXFHHFSGFGGLK', find the non-repeating letters.
Given an n-ary tree, write code to flatten it and store the output in a list.
Given the Infix, Prefix, or Postfix notation of an expression, write the code to compute the final result.
Given the input string "AAABBBCCCDDDAAA," compress it to output "A3B3C3D3A3."
How are strings handled in Scala? How are they different from Java strings?
How do you clean missing values in a pandas DataFrame?
How do you install a Python library that is not in the Databricks runtime?
How do you sort a dictionary based on values?
How would you configure workload management (WLM) queues for heavy queries?
How would you implement a program to determine the frequency of each letter in a string?
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