A binary number system with 2n bits, all of the which are 1’s has the value?

Uttar Pradesh Power Corporation Limited Junior Engineer Exam Mock Test

It's important to note that practicing previous year's Junior Engineer exam questions can be a useful way to prepare for the exam and understand the exam pattern and question types. However, relying solely on previous year's questions may not be enough to score well on the actual exam, as the exam content and structure may change every year. It's essential to refer to the official syllabus, study materials, and practice mock tests to prepare effectively for the future UPPCL Junior Engineer exam.