In TKAM, does the author of this text highlight specific experiences where prejudgment, prejudice and social expections are evident?

These are three of the major themes discussed by author
Harper Lee in her novel To Kill a Mockingbird. There are many
different
examples.

PREJUDGMENT.  Many
of the various characters are prejudged due in part to social bias and expectations.
Scout's immaturity is evident throughout much of her narrative. Boo Radley is probably
the best example; rumors about his unusual behavior make him out to be some sort of
monster, but those few people who have contact with him know better, as Scout discovers
in the final chapters. African-Americans are blamed for most unexplained circumstances
in the town, and Dolphus Raymond is presumed to be mentally unbalanced because of his
preference to live with
Negroes.

PREJUDICE.  Racial
prejudice is rampant in TKAM. African-Americans are scorned by most
(but not all) of Maycomb's white population. Many of the town's white families (the
Ewells and Cunninghams) are also treated with disdain; likewise, women do not receive
social equity. The mentally unstable are also looked down
upon.

SOCIAL EXPECTATIONS. 
There are several different social classes evident in Maycomb. Jem describes the four
different "peoples" as people like the Finches and their neighbors; people from Old
Sarum, such as the Cunninghams; people like the Ewells; and Negroes. Aunt Alexandra
particularly does not approve of mixing with any of the last three groups, though
Atticus mixes freely with them all (though he, too, is not fond of the
Ewells).