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Computer Science
1000 Microcontroller
Quiz 2
Solution
Q.1.
Why are optoisolators normally used between the microcontrollers and the ULN2803?
a) to reduce the back emf
b) to increase the current
c) to increase the voltage
d) to optimize the current
Q.2.
Which of the following bit/s of the status register that allows the microcontroller to operate in its low power mode?
a) CPU off
b) Z
c) N
d) Reserved
Q.3.
To improve the efficiency of an MSPbased microcontroller, for one register
a) there are two values for each addressing mode
b) there is only one value for all addressing modes
c) there are 4 values for four addressing modes
d) there are 2 values for four addressing modes
Q.4.
Which of the following is the basic functions of a timer?
a) it can control the compare, capture mode
b) it provided a time delay
c) it can act as a counter
d) all of the mentioned
Q.5.
Which of the following is correct about WDTCTL?
a) it is guided against accidental writes that require a password
b) a reset will occur if a value with an incorrect password is written to WDTCTL
c) it is a 16 bit register
d) all of the mentioned
Q.6.
What is the function of this instruction “WDTCTL = WDTPW | WDTCONFIG”, where **#define WDTCONFIG (WDTCNTCL|WDTSSEL)**
a) it configures and sets the watchdog timer
b) it stops the watchdog timer
c) it sets the watchdog timer
d) it configures and clears the watchdog timer
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