Which register is used to configure pins A0 to A7 as input or output?
DDRA
PORTB
PORTA
DDRB
ANSWER: 1

Which step sets PB0 and PB2 HIGH(ON)?
PORTB = 5
DDRB = 2
PORTB = 7
PORTB = 1
ANSWER: 1

Which step sets PB0,PB1,PB2,PB3 as outputs?
PORTB = 5
DDRB = 15
PORTB = 7
DDRB = 7
ANSWER: 2
