Multiple Choice

Identify the letter which best answers each question. Please write your answer in the line provided or you may not receive credit for the problem. $q,1.$ Which set of instructions will create the waveform and light the LED as shown in the diagram? The LED is connected to P$14.$

A$.$ HIGH $12,$ PAUSE $500,$ LOW $12,$ PAUSE $500$

B$.$ HIGH $500,$ PAUSE $12,$ LOW $500,$ PAUSE $12$

C$.$ HIGH $14,$ PAUSE $1000,$ LOW $14,$ PAUSE $1000$

D$.$ HIGH $12,$ PAUSE $12,$ LOW $12,$ PAUSE $12$

E$.$ HIGH $14,$ LOW $14,$ PAUSE $500,$ PAUSE $500$

F$.$ None of the above.

$q,2.$ The cathode of an LED is connected to $P5$ of a $BS2$ with its anode connected to $V_{DD}$ through a green$-$blue$-$brown$-$gold resistor. Which of the following commands will light the LED?

A$.$ HIGH $13$

D$.$ TOGGLE $5$

B$.$ PULSOUT $5,$ NOW

E$.$ DEBUG "Light LED now!"

C$.$ LOW $5$

F$.$ HIGH $5$

$3.$ An LED is connected to an output pin on the BS$2.$ Which resistor below will set the LED curren approximately $9mA.($NOTE: Assume the LED will drop about $2\mathrm{.}0$ volts.$)$

A$.$ yellow$-$violet$-$red$-$gold

D$.$ brown$-$black$-$yellow$-$gold

B$.$ brown$-$black$-$black$-$gold

E$.$ orange$-$orange$-$brown$-$gold

C$.$ green$-$brown$-$red$-$gold

F$.$ Any of the above.

$4.$ Which of the following commands will cause the BASIC stamp to delay for $10$ seconds?

A$.$ PAUSE $100$

D$.$ PAUSE $10000$

B$.$ PAUSE $500$

E$.$ PAUSE $5$

C$.$ PAUSE $10$

F$.$ None of the above.

$5.$ Input $1,$ Input $2$ and Output I have been defined as nibble variables. If both Input $1$ and Input $2$ are ec $9_{10},$ what will the decimal value of Output $1$ be after the following program line:

Output$1=$ Input$1+$ Input$2$

A$.2$

D$.0$

B$.16$

E$.$ None of the above.

C$.18$