Questions

The last line from the file "trial" would be read twice. To avoid this, ues:

       While ( fgets (str, 80, fp) ! = NULL)

               puts (str);

The purpose of this question is to see if you already have some experience of working at a call center. If so, tell the interviewer about your experiences and what you learnt there. If you do not have a work experience, don’t panic, stay calm and say “I don’t have a first hand experience of working at a call center but this is what I know about them and I look forward to work for one.” 

Bookkeeper is the only English word that has three consecutive double letters.

A computer program is a set of instructions i.e algorithm that are to be executed to complete a task.

Solar radiation instruments may be produced to measure different types of solar energy. When sunlight encounters the Earth's atmosphere, some of it is absorbed or scattered by water vapor, aerosols, clouds, and other air molecules. The radiation which penetrates to the Earth's surface is termed direct solar radiation.

A thermopile pyranometer is a type of actinometer used for measuring solar radiation on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.

A Project Management office (PMO) is an organizational unit to centralize and coordinate the management of projects under its domain. A PMO can also be reffered to as a "program management office", "Project office", or "Program office". A PMO oversees the management of projects, programs, or a combination of both.

PMOs can operate on a continuum, from providing project management support functions in the form of training, software, standardized policies, and procedures, to actual direct management and responsibility for achieving the project objectives.