3.1 Specifications for Queue rear A Queue is a data structure in which insertions take place at front one end and deletions take place at the opposite end. 票签 Characteristic: First In first outA Queue is a data structure in which insertions take place at one end and deletions take place at the opposite end. 3.1 Specifications for Queue Characteristic: First In First Out 2 3 4 1 1 1 2 2 front rear