AP CSA Unit 1 Day 5: Method Composition Tracing
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Advanced Practice Question
String s = "CODE";
s = s.toLowerCase();
s = s.substring(1, 3);
System.out.println(s);This question tests your understanding of nested calls. The correct answer demonstrates precise knowledge of how Java handles method composition tracing.
Students often make errors with method composition tracing by not carefully tracing execution or understanding the underlying concept.
This Cycle 2 HARD question requires careful attention to detail and understanding of how Java behaves in this scenario.
For questions testing method composition tracing, always trace execution step-by-step. Write down intermediate values. Don't skip steps - the AP exam rewards precise understanding of Java behavior.
Master This Topic
This Cycle 2 HARD question tests method composition tracing. Review Unit 1 concepts to build mastery of primitive types, objects, and String manipulation.
- Understanding nested calls
- Tracing code execution accurately
- Avoiding common pitfalls
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Cycle 2 questions prepare you for the hardest AP CSA exam questions.
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