2020_2_CSE340F20_Exam_2.pdf

1/2/21, 6’09 AM Quiz: EXAM 2- Requires Respondus LockDown Browser Page 1 of 32 https://asu.instructure.com/courses/67677/quizzes/502776/take?preview=1 EXAM 2- Requires Respondus LockDown Browser ! This is a preview of the published version of the quiz Started: Jan 2 at 6:08am Quiz Instructions If you think that there is an issue with any question, write your assumption in the box at the end of the exam that I left for that purpose. I will look at it while grading. The grade that you will see when you submit is not necessarily the actual grade. 1. Keep your speaker on so that you can hear the announcements made during the exam. 2. Open book and open notes . This exam is open book and open notes. No electronic notes and no electronics other than for zoom and the lockdown browser. 3. No outside help . You are not allowed to get help form anyone directly or indirectly during the exam 4. No questions during the exam . If you think there is an issue with a question, you can write your assumptions and I will look at them when I grade. 5. Logged-in to zoom . You should be logged in to zoom and on- camera for the duration of the exam. 6. No pseudonyms/aliases . You should use your actual name not an alias or a pseudonym while logged-in on zoom for the exam 7. No disconnect . If you are disconnected you should get back on zoom in a very very short amount of time 8. Finishing When you are done, you should write a private chat message saying that you are done and stay in class.

1/2/21, 6’09 AM Quiz: EXAM 2- Requires Respondus LockDown Browser Page 2 of 32 https://asu.instructure.com/courses/67677/quizzes/502776/take?preview=1 1 pts Question 1 2 5 none of the other answers 4 3 0 There is a total of 30 questions in this exam. 15 questions are on lambda calculus and 14 questions are on pointer semantics and 1 question is on names and attributes. Not all questions require the same amount of effort. Some questions can be answered in less than half a minute and some questions take a couple minutes. For each concept, I tried to start with the easier questions, but what is easier in general varies from one student to another. Good Luck! _________________________________________________________ Question 1. How many free variables are in the following lambda expression? x. x x x x x

1/2/21, 6’09 AM Quiz: EXAM 2- Requires Respondus LockDown Browser Page 3 of 32 https://asu.instructure.com/courses/67677/quizzes/502776/take?preview=1 1 1 pts Question 2 5 4 0 1 3 none of the other answers 2 Question 2. How many free variables are in the following lambda expression? x. ( x x ) x x x 1 pts Question 3 Question 3. How many free variables are in the following expressions? x x. ( y y ) ( x. x x ) x

1/2/21, 6’09 AM Quiz: EXAM 2- Requires Respondus LockDown Browser Page 4 of 32 https://asu.instructure.com/courses/67677/quizzes/502776/take?preview=1 2 4 none of the other answers 0 1 3 1 pts " HTML Editor Question 4 Question 4. Which variables are bound to x. at I ? λ x. x ( λ x. x y ) x ( λ y. x y ) x I 1 II 2 3 4 III 5 6 7 Just write the numbers corresponding to the bounds variables. ± ² ³ ´ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ À Á Â Ã # $ Ä Å 12pt Parag

1/2/21, 6’09 AM Quiz: EXAM 2- Requires Respondus LockDown Browser Page 5 of 32 https://asu.instructure.com/courses/67677/quizzes/502776/take?preview=1 0 words Æ 1 pts " HTML Editor Question 5 Question 5. Which variables are bound to x. at II ? λ x. x ( λ x. ( x y ) x ( λ y. x y ) ) x I 1 II II 2 3 4 III 5 6 7 Just write the numbers corresponding to the bounds variables. ± ² ³ ´ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾

1/2/21, 6’09 AM Quiz: EXAM 2- Requires Respondus LockDown Browser Page 6 of 32 https://asu.instructure.com/courses/67677/quizzes/502776/take?preview=1 ¿ À Á Â Ã # $ Ä Å 12pt Parag 0 words Æ 1 pts " HTML Editor Question 6 Question 6. Identify the redexes in the following expression by writing the roman numerals of the abstraction of the redex. ( x. ( x. y) x ) ( x. x. y x ) ( x. x. y x ) x I II III IV V VI

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