The overall efficiency of the compressed air system is the

ratio of shaft output of the air motor to the shaft input to the compressor
ratio of shaft input to the compressor to the shaft output of air motor
product of shaft output of air motor and shaft input to the compressor
none of the above
✅ The correct answer is option A.

A base register table___________________?

A. is a term that refers to the control programs of an operating system
B. allows multiple programs to reside in separate areas of core at the same time
C. allows the programmer to write base registers and displacements explicitly in the source program
D. is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain
✅ The correct answer is option D.

Which selective retest technique selects every test case that causes a modified program to produce a different output than its original version?

A. Coverage
B. Minimization
C. Safe
D. Maximization
✅ The correct answer is option C.
Explanation: Safe techniques do not focus on coverage criteria, instead they select every test case that cause a modified program to produce different output than its original version

User requirements are expressed as _______________ in Extreme Programming?

A. implementation tasks
B. functionalities
C. scenarios
D. none of the mentioned
✅ The correct answer is option C.
Explanation: User requirements are expressed as scenarios or user stories.These are written on cards and the development team break them down into implementation tasks. These tasks are the basis of schedule and cost estimates