Quick quiz on Objective-C
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This document is from a computer science practical session on Objective-C given by Stephen Gilmore on October 19, 2012. It contains several questions about whether sample code snippets would print "Yes", "No", or throw an exception, followed by the answers.
Quick quiz on Objective-C
- 1. Computer Science Large Practical: Quick quiz on Objective-C Stephen Gilmore School of Informatics Friday 19th October, 2012 Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 1 / 15
- 2. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 2 / 15
- 3. Answer: it prints Yes. . . . it prints Yes. Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 3 / 15
- 4. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 4 / 15
- 5. Answer: it prints No. . . . it prints No. Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 5 / 15
- 6. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 6 / 15
- 7. Answer: neither, it throws an exception. . . . neither, it throws an exception. Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 7 / 15
- 8. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 8 / 15
- 9. Answer: it prints No. . . . it prints No. Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 9 / 15
- 10. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 10 / 15
- 11. Answer: it prints No, because we are using pointer equality . . . it prints No, because we are using pointer equality Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 11 / 15
- 12. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 12 / 15
- 13. Answer: it prints Yes, because we are using content equality . . . it prints Yes, because we are using content equality Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 13 / 15
- 14. Question: Does this program print Yes, No or neither? Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 14 / 15
- 15. Answer: neither, it throws an exception because we forgot to call init . . . neither, it throws an exception because we forgot to call init Stephen Gilmore (School of Informatics) Computer Science Large Practical Friday 19th October, 2012 15 / 15