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What will be the output of the following Python code snippet that demonstrates variable assignment and type behavior?

x = 10
y = x
x = 20
print(y)

  1. 20

  2. 10

  3. Error: undefined variable

  4. None

Show answer & explanation

Correct answer

10

Explanation

In Python, when y = x is executed, y gets the value 10 (not a reference). When x is reassigned to 20, y remains 10 because integers are immutable and y holds its own copy of the value.

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All 40 Python Syntax and Variables questions

  1. 1.What is the primary purpose of using variables in Python programming?
  2. 2.What is the correct syntax for assigning a value to a variable named 'age' with the integer value 25 in Python?
  3. 3.Which of the following is a valid variable name in Python according to naming conventions?
  4. 4.What data type is assigned to the variable when executing the statement 'price = 19.99' in Python?
  5. 5.How do you check the data type of a variable named 'name' that contains 'Hari' in Python?
  6. 6.What will be the output when you print a variable 'count' that has been assigned the value 0?
  7. 7.Which statement correctly describes how Python handles variable naming case sensitivity?
  8. 8.What is the result of assigning multiple variables in a single line using the statement 'x, y, z = 1, 2, 3'?
  9. 9.What does the following code snippet output when executed?
  10. 10.What is the value of the variable 'result' after executing the following code?
  11. 11.What will be printed when the following code is executed?
  12. 12.What is the data type of the variable 'is_student' after executing the statement 'is_student = True'?
  13. 13.What does the following code output?
  14. 14.Which of the following statements correctly demonstrates variable reassignment in Python?
  15. 15.What will be the output of the following code snippet?
  16. 16.What will be the output when the following code snippet is executed?
  17. 17.Which statement correctly demonstrates the concept of variable reassignment in Python?
  18. 18.What is the data type of the variable result after executing the following code?
  19. 19.Predict the output of the following code snippet involving string concatenation and variable assignment?
  20. 20.What will be the output when the following code is executed and what concept does it demonstrate?
  21. 21.Identify the bug in the following code snippet where Hari attempts to calculate the sum of two numbers?
  22. 22.What will be the output when the following code snippet with multiple assignments is executed?
  23. 23.Which of the following statements correctly explains the naming convention rules for variables in Python?
  24. 24.Predict what will happen when Rajesh executes the following code that attempts to use an undefined variable?
  25. 25.What is the output of the following code that demonstrates type conversion and variable operations?
  26. 26.What will be the output of the following code snippet that involves variable scope and reassignment with arithmetic operations?
  27. 27.Identify the logical error in Vikram's code that attempts to swap two variable values without using a temporary variable?
  28. 28.What will be the output when the following code involving string methods and variable assignment is executed?
  29. 29.Predict the output of the following code that demonstrates operator precedence with variable assignments?
  30. 30.What will be the output when Ananya executes the following code that involves type checking and conditional variable assignment?
  31. 31.Identify the bug in the following code where Deepak attempts to calculate average of three numbers?
  32. 32.What will be the output of the following code that involves multiple variable assignments and string formatting?
  33. 33.Predict the behavior when the following code attempts to perform operations on variables of mixed numeric types?
  34. 34.What will be the output of the following code that demonstrates variable aliasing and mutability concepts?
  35. 35.Identify the subtle issue in the following code where Meera attempts to use global variable behavior in a function-like context?
  36. 36.What will be the output of the following Python code snippet that demonstrates variable assignment and type behavior?
  37. 37.Predict the output of this code where Hari attempts to use variables before they are declared in Python?
  38. 38.What is the difference between variable naming conventions and what will happen when Prasath writes a variable name starting with a number?
  39. 39.Predict the behavior when Deepak reassigns a variable to a different data type, and what will be printed by this code?
  40. 40.What will be the output when Anjali uses multiple assignment with unpacking in Python, and how does tuple unpacking work with variables?