A thesis (Often Bachelors/Masters) or dissertation (often Doctoral) is a document submitted in support of candidature for an academic degree or professional qualification presenting the author's research and findings. In some contexts, the word "thesis" or a cognate is used for part of a bachelor's or master's course, while "dissertation" is normally applied to a doctorate, while in other contexts, the reverse is true.
In Russia, Kazakhstan, Belarus, Ukraine an academic dissertation or thesis is called what can be literally translated as a "master's degree work" (thesis), whereas the word dissertation is reserved for doctoral theses (Candidate of Sciences). To complete a master's degree, a student is required to write a thesis of about 110–130 pages and to then defend the work publicly.(Wikipedia).