Final answer:
The line quoted does not utilize simile, metaphor, hyperbole, or personification; it is a simple statement without the use of any figurative language or direct comparison.
Step-by-step explanation:
The technique being used in the line 'Now, Banjo, I know mamma wants me, / And so I must bid you good-bye!' is not an example of a simile, metaphor, hyperbole, or personification. It is a straightforward statement without the use of figurative language or comparing two things. In literary devices, a simile explicitly compares two things using 'like' or 'as', for example, 'My darling, you are like a rose', while a metaphor implies the comparison without 'like' or 'as', such as 'My love, you are a rose'. The text does not suggest any implicit or explicit comparison or exaggeration.