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CSCI 310 Midterm questions with complete solutions.
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CSCI 310 Midterm questions with complete solutions.
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CSCI 310 Midterm questions with complete solutionsSoftware Engineering Failures Correct Answer- Ariane 5 Rocket - overflow caused
rocket to explode
Mars Climate Orbitor - did not use metric units so orbitor crashed
Therac 25 - gave 100x radiation due to lack of testing and user interface
World War III - soviet early warning system registered sun off of clouds as nukes
Hartford Coliseum Collapse - wet snow caused roof to collapse since there was an error in domain knowledge by the cad software Patriot Fails - gulf war missle interception system had a rounding error that caused the missiles to be too slow and a barracks blew up
Disastrous Study - The New England Journal of Medicine reported increased suicide rates after severe natural disasters but were false since error doubled the suicides for one year
y2k - computer systems only used 2 numbers for date which would cause issues in 2000 cost billions
healthcare.gov - did not test with lots of users so only 1% of people could sign up
Challenges in Software Design Correct Answer-Scale: Larger = harder
Complexity: lots of APIs, web services
Uniqueness: no software is the same
Culture: requires a lot of planing of complex systems and maitnence
Speed: software expected to be faster which is hard
Legacy software: understanding and using past software
Changeability software must be flexible
Systematic Correct Answer-done according to a plan diciplined Correct Answer-controlled behavior
Quatifiable Correct Answer-measuring how productive engineers are
development Correct Answer-creating software
Operation Correct Answer-creating good user interfaces
matenience Correct Answer-knowing how to fix bugs, update software, etc.
Software project Correct Answer-something that uses software development processes
Product Correct Answer-output of a software project
Waterfall lifecycle Correct Answer- Requirements (RE)
Planning Design
Implementation Testing
Maintenance
Distribution of effort Correct Answer-Matenice 60%
Of the rest 40%
- Testing = 45%
- Implementation = 20%
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