kiran publication is good
BSNL Latest Books
Based on my previous years BSNL JE (BSNL TTA ) Exam .this paper Conduct online and 20 MCQ ( multiple choice Question ) For General Knowledge this part is very simple. Just like how many total digit in ADHAR CARD and so on. But remaining part not to easy this part mostly about Physics and part of electronics subjects.so if you preparing for this exam so I would like to suggest you to please focus on this part ( physics +2 level and parts of Electronics Engineering ).