GATE 2015 CS (CS3) – Question 33

Software Engineering · Software Development Life Cycle Models · 1 mark · Numerical answer

A program is seeded with 100 artificial faults. Testing detects 159 faults, of which 75 are seeded. Assume real and seeded faults have the same detection distribution. Estimate undetected real faults.

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: 28

Explanation

The seeded detection fraction is 75/100=0.75. Detected real faults number 159−75=84. Equating the fractions gives total real faults 84/0.75=112, leaving 112−84=28 undetected real faults.

More Software Development Life Cycle Models questions

GATE 2014 CS (CS1) Q28 – Match models 1: Waterfall, 2: Evolutionary, 3: Component-based software engineering, 4:…
GATE 2011 CS (CS1) Q15 – A product is maintained five years. With language L₁, development effort is LOC/10000…
GATE 2011 CS (CS1) Q17 – A digital signal-processing application has 40000 lines. Basic COCOMO for embedded…
GATE 2010 CS (CS1) Q32 – Match lifecycle activities P: requirements capture, Q: design, R: implementation, S:…
GATE 2015 CS (CS2) Q29 – In basic COCOMO, E is person-month effort, D chronological development months, KLOC…
GATE 2015 CS (CS2) Q64 – Which assertion about code inspection and code walkthrough is true?

All Software Development Life Cycle Models questions →