Microcontroller-Chapter 2 (Part 1)

Which of the following is the correct symbol used for multiple-line comments in C?

• // comment //

• /* comment */

• # comment #

• -- comment --

Which statement best describes the use of multiple-line comments in C?

• They are used only at the beginning of the program.

• They provide a deeper explanation and can span several lines.

• They must always appear after a return statement.

• They are automatically converted into documentation files.

What is the function of the TRIS register in a PIC microcontroller?

• To store data temporarily in memory

• To set the clock frequency of the microcontroller

• To enable or disable interrupts

• To control whether each pin in a PORT is input or output

Which of the following correctly describes the effect of setting TRISB = 0x00; in a PIC microcontroller?

• All pins of PORTB are configured as input.

• All pins of PORTA are configured as input.

• All pins of PORTA are configured as output.

• All pins of PORTB are configured as output.

What is the main function of an ADC (Analogue-to-Digital Converter) in a PIC microcontroller?

• To convert digital signals into analogue signals

• To convert analogue signals into digital signals

• To amplify analogue signals

• To generate analogue signals from sensors

What is the effect of the instruction ADCON0 = 0x00; in a PIC program?

• It turns the ADC on.

• It sets all PORTA pins as analogue.

• It turns the ADC off.

• It converts all bits to input mode.

Which register controls the internal oscillator block in a PIC microcontroller?

• T0CON

• ADCON0

• OSCCON

• OPTION_REG

To set the oscillator frequency to 8 MHz, which bits of the OSCCON register must be set to logic '1'?

• b7, b6, b5

• b6, b5, b4

• b3, b2, b1

• b2, b1, b0

In a C program, the statement while(RA0 == 0) { } means:

• Execute instructions while RA0 is logic ‘1’

• Do nothing while RA0 is logic ‘0’

• Toggle RA0 every time it becomes 0

• Set RA0 to 0 and continue execution

What happens when the switch connected to bit 0 of PORTA is pressed and the input becomes logic ‘1’?

• The microcontroller continues doing nothing

• The microcontroller resets all PORTA bits

• The program moves on to execute the next instructions

• The microcontroller restarts the while loop indefinitely