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1. What are the di erences between reviews and formal technical reviews An inspection or formal technical review (FTR) requires an explicit, completed product. The producer must be an active participant in the review/inspection. The inspection/FTR must be part of the de ned software process. The primary purpose is to nd defects. The inspection must follow the speci ed process with the speci c roles and steps. 2. How can you evaluate a checklist Use it in reviewing software code/documents. Record the issues identi ed with each checklist item. Record the faults found after the item was successfully reviewed. 3. What revisions to a checklist should be done Items that are not associated with the detection of faults should be removed. Faults that are detected during later phases of the life cycle should be used to generate new checklist items.
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4. What factors in uence the e ectiveness of a formal technical review The preparation time and the review time. 5. How is the e ectiveness of a formal technical review measured Usually in the rate of discovery of faults. This can be measured both in faultsfound/KLOC and in faults-found/reviewer-hour. 6. What happens if a producer cannot resolve an issue If the manager cannot resolve the issue, there will probably be a reinspection going through all the phases. 7. What happens if one or more members of the inspection team disagree with the majority The minority will produce a minority report presenting their views. 8. If an honest die is rolled 5 times, what is the probability of not seeing a 6 in any of the rolls 5=6 5 0:4018 9. If an honest die is rolled 5 times, what is the probability of seeing a 6 on at least one of the rolls 1 5=6 5 1 0:4018 0:5982
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1. Build a checklist for reviewing C code. 1. 2. 3. 4. 5. 6. Are all pointers initialized in the constructor Are all variables declared Does every { have a matching } Does every equality comparison have a double = Are any while or if conditions closed with a ; Does every class declaration end with a ;
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The preceding are sample checklist items I developed based on personal experiences of making C faults. In particular, I ve spent a long time nding a fault caused by item 5. 2. Build a checklist for reviewing software designs 1. Are all signi cant functions shown in design 2. Are all signi cant attributes speci ed in design 3. Are all names related to purpose and type and are they unambiguous
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4. Are all relationships between classes speci ed 5. Do all functions have the data necessary for the function to execute 3. Draw a process model for a formal inspection. See Fig. 7-2.
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Preparation Schedule inspection Moderator Prepare
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Record
Report Assignments Reader Product Give overview Inspect Overview Resolve issues Recorder Results, issues
Answer question
Final report Moderator
Fig. 7-2.
Process model for inspection.
4. Assuming that the tests are representative of the operational situation, calculate the reliability of a software system that has had 10 errors in 200 test cases. F 1 10=200 0:05 R 1 0:95
5. Assume that FTR technique A requires 2 hours/KLOC preparation and allots 1 hour/KLOC review time and FTR technique B requires 1 hour/KLOC preparation time and 4 hours/KLOC review time. Also assume that in a controlled experiment with the same source code, technique A nds 12 errors/KLOC and B nds 14 errors/KLOC. Compare the two techniques for e ectiveness. Technique A took 80 percent of the time of technique B and found 85 percent of the errors that B found. So A is slightly more e cient than B. From the point of view of marginal improvement, it took 2 hours/KLOC more e ort to nd the last 2 errors/KLOC. 6. If the software had 5 failures in 100 tests during 10 days of testing, what would be a good estimate of the reliability of the software over the next day Week F 1 0:05 Next day Assume 10 tests per day (average from last 10 days). R 10 R 1 10 0:9510 0:598: Next week Assume 70 tests. R 10 R 1 70 0:9570 0:027: 7. Develop an SQA plan for the B&B problem ( 4, Problem 3). R 1 0:95
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