sample-midterm - CSE 489/589 Midterm Exam An Old Exam Time...

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CSE 489/589 Midterm Exam An Old Exam Time: 50 minutes. Date/Month/Year Total points: 100. There are totally 4 questions. Please use the space provided for each question, and the back of the page if you need to. You are not allowed to use any additional pages. The space given per question is a lot more than sufficient to answer the question. Hence, if you find yourself writing too much, you know it is not going to help. Please stop writing when you are told to do so. We will not accept your submission otherwise. Your name: ———————————————————————- Person number: ———————————————————————- The rest of this page is for official use only. Do not write on the page beyond this point. Problem Number Score obtained name and id (2 max) Problem 1 (30 max) Problem 2 (21 max) Problem 3 (14 max) Problem 4 (35 max) Total Score: (100 max) 1
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Problem 1 (30 points). Mark the correct choice(s). You do not have to justify your answer. Each question is worth 3 points. (a) Consider a code C which contains precisely the following codewords: 000000, 010011, 101100, 110101 . At the maximum, how many bit errors can this code detect ? 2 1 2 2 2 3 2 4 2 5 2 6 (b) Consider the same code as in part (a). At the maximum, how many bit errors can this code correct ? 2 1 2 2 2 3 2 4 2 5 2 6 (c) Consider a TCP connection between two hosts A and B . Data segments from A to B on this connection have source port 22222 and destination port 33333 . Data segments from B to A on this connection have 2 source port 33333 and destination port 22222 .
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