Choose an internal software quality from given below________________________?

A. scalability
B. usability
C. reusability
D. reliability
✅ The correct answer is option C.
Explanation: rest all are external qualities which are visible to the user.

A _______________ is developed using historical cost information that relates some software metric to the project cost ?

A. Algorithmic cost modelling
B. Expert judgement
C. Estimation by analogy
D. Parkinson’s Law
✅ The correct answer is option A.
Explanation: The model uses a basic regression formula with parameters that are derived from historical project data and current as well as future project characteristics.