You want to optimize memory by checking if two string variables str1 and str2 refer to the same object. Which code snippet correctly uses identity operators for this?

hard📝 Application Q8 of 15

Python - Operators and Expression Evaluation

You want to optimize memory by checking if two string variables str1 and str2 refer to the same object. Which code snippet correctly uses identity operators for this?

Aif str1 == str2: print("Same string object")

Bif str1 is str2: print("Same string object")

Cif str1 is not str2: print("Same string object")

Dif str1 != str2: print("Same string object")

Step-by-Step Solution

Solution:

Step 1: Understand identity vs equality
is checks if both variables point to the same object, which is important for memory optimization.
Step 2: Analyze options
if str1 is str2: print("Same string object") correctly uses is to check identity.
Step 3: Identify incorrect options
Options B and D check value equality/inequality, not identity; if str1 is not str2: print("Same string object") checks for different objects but prints "Same string object" which is contradictory.
Final Answer:
if str1 is str2: print("Same string object") -> Option B
Quick Check:
Use 'is' to check if two variables share the same object [OK]

Quick Trick: 'is' checks object identity, ideal for memory optimization [OK]

Common Mistakes:

MISTAKES

Using '==' instead of 'is' for identity check
Printing contradictory messages with 'is not'
Confusing identity with equality

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You want to optimize memory by checking if two string variables str1 and str2 refer to the same object. Which code snippet correctly uses identity operators for this?

Step 1: Understand identity vs equality

Step 2: Analyze options

Step 3: Identify incorrect options

Final Answer:

Quick Check:

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