midterm3_sol

midterm3_sol - First Name: Last Name: PID: CSE 140 Midterm...

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First Name: Last Name: PID: CSE 140 Midterm 3-Solutions Tajana Simunic Rosing Spring 2010 Do not start the exam until you are told. Turn off any cell phones or pagers. Write your name and PID at the top of every page. Do not separate the pages. This is a closed-book, closed-notes, no- calculator exam. You may only refer to one page of your own notes. Do not look at anyone else’s exam. Do not talk to anyone but an exam proctor during the exam. If you have a question, raise your hand and an exam proctor will come to you. You have 80 minutes to finish the exam. When the time is finished, you must stop writing. Write your answers in the space provided. To get the most partial credit, clearly and neatly show all steps of your work. 1. 20 points 2. 15 points 3. 15 points 4. 15 points 5. 20 points 6. 15 points Total (100pts.)
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First Name: Last Name: PID: Problem 1 (20 points) Multiple choices are worth 2 points each and True/False are worth 1 point each. 1. What is the output of the following circuit? A. 1 B. A × B C. A + B Answer : E D. A' × B' + A × B E. A' × B + A × B' 2. Which of the following expressions look the same in SOP and POS? i. X' ii. X×Y + X'×Z+ X×Y'×Z' iii. X×Y×Z' iv. X+Y+Z' A. (i) and (iii) only B. (i) and (iv) only Answer : E C. (iii) and (iv) only D. (ii), (iii) and (iv) only E. (i), (iii) and (iv) only 3. The circuit below compares three unsigned 4-bit binary numbers X , Y , and Z using the 4-bit magnitude comparators. Which of the following values of X , Y , and Z will result in S being 1? A. X = 0000, Y = 1000, Z = 1111 B. X = 1111, Y = 1000, Z = 0000 C. X = 1111, Y = 0000, Z = 1000 Answer : C D. X = 1000, Y = 1111, Z = 0000 E. None of the above
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First Name: Last Name: PID: 4. A new flip-flop, called AB flip-flop, is created as shown below. What does the flip flop do? A. Set command
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This note was uploaded on 11/10/2010 for the course CSE 140 taught by Professor Rosing during the Spring '06 term at UCSD.

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midterm3_sol - First Name: Last Name: PID: CSE 140 Midterm...

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