To answer this query, we would first need to understand what postmodernism is. So, Postmodernism, in Western philosophy, is characterized by broad cynicism, subjectivity, or relativism. This theory depends on a general mistrust of reason; and an acute understanding to the role of principles in assuming and balancing authority in relation to individuality.
Here, John Updike’s “A & P” is certainly an example of the postmodernist idea. This is because one of the characters Sammy quits the job without any thoughts about his family. He represents an individualistic resolution which wholly depends on his personal ethics. He owns a selfish attitude and acts to be a hero. Another aspect that classifies the story as a post-modern write-up is its portrayal of female exploitation. Females are accepted when they present themselves as some sophisticated beings. We can note the attitude of the manager towards the girls at the very start of the story when he kicks them out because they had not much on them.