100+ Python, Java & Data Structures Interview Questions

100+ Python, Java & Data Structures Interview Questions

💻 100+ Python, Java & Data Structures Interview Questions (Fresher Friendly)

Python • Java • Data Structures • Algorithms

coding interview preparation

🐍 Python Interview Questions

Python coding interview
  • What are Python features?
  • Difference between Python 2 and 3?
  • What is a list, tuple, set, and dictionary?
  • What is Python's pass statement?
  • What are Python functions and lambda functions?
  • What is Python's GIL?
  • Explain Python OOP concepts.
  • What is the difference between shallow and deep copy?
  • What is Python iterator and generator?
  • How do you handle exceptions in Python?
  • Explain Python decorators and their use.

☕ Java Interview Questions

Java coding interview
  • What are Java features?
  • Difference between JDK, JRE, and JVM?
  • Explain OOP concepts in Java.
  • What is inheritance, polymorphism, encapsulation?
  • What is difference between abstract class and interface?
  • What is final keyword in Java?
  • What is exception handling?
  • What is multithreading and synchronization?
  • What is Java collection framework?
  • Difference between ArrayList and LinkedList?
  • Difference between HashMap and Hashtable?
  • Explain Java memory management.

🧠 Data Structures & Algorithms Interview Questions

data structures interview
  • What is a Data Structure?
  • Difference between array and linked list?
  • Difference between stack and queue?
  • What is a binary tree?
  • Difference between BFS and DFS?
  • What is a hash table?
  • Difference between heap and stack memory?
  • Explain Big O notation.
  • What is a graph? Types of graphs?
  • What are sorting algorithms and their complexities?
  • What is recursion? Give example.
  • Explain dynamic programming briefly.

🏆 Tips to Crack Python, Java & DSA Interviews

  • Practice small coding problems daily.
  • Understand OOP principles and Python syntax deeply.
  • Focus on arrays, strings, linked lists, stacks, queues.
  • Learn to write clean code and explain logic during interview.
  • Prepare for time and space complexity questions.
  • Revise commonly asked patterns like recursion, sorting, searching.
  • Try online coding platforms like LeetCode, HackerRank, and GeeksforGeeks.
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