Answer:
One example of dramatic irony in Acts 4 and 5 of "Julius Caesar" is the fact that Brutus and the conspirators believe that they are acting in the best interest of the Roman Republic, but in reality, their actions will lead to its downfall. For instance, Brutus delivers a speech in Act 4, Scene 3, in which he justifies the assassination of Caesar and convinces the Roman citizens that it was necessary to save the Republic. However, the audience knows that the conspirators' actions will ultimately lead to a power vacuum, civil war, and the eventual rise of an empire. This contrast between what the characters believe and what the audience knows creates dramatic irony and adds tension to the play.