List of top Geographic Information System Questions

The table below is an attribute table about employee records. Which attribute can be used as a primary key?

EmployeeNameDesignationDepartment
(Emp_ID)(Emp_Name)(Emp_Desig)(Emp_Dept)
100260PrashantSoftware DeveloperInformation Technology
100265DineshJunior EngineerEmbedded System
100252SomyaHR ManagerManagement
100271DineshJunior EngineerInformation Technology

 

Which one of the following statements is NOT correct in the context of Geographic Information System?
In a closed traverse with five sides, the closing error found from the fore bearing and back bearing of the last line is $+0.5^\circ$. The correction to the fourth line will be:
When conducting a survey using a total station, a zenith angle is measured as $84^\circ13'56''$ in the direct mode. What is the equivalent zenith angle in the reverse mode?