ESP - Week 1

Question 1

What is an embedded system

Answer 1

A combination of hardware and software which together form a larger machine

Question 2

Sensors

Answer 2

Temperature
Humidity
Touch
Mic
Camera

Question 3

Actuators

Answer 3

Lights
Motors
Wheels
Screens
Sirens

Question 4

Microcontroller Advantages

Answer 4

Small
Cheap
Can make lots
Standalone

Question 5

Microcontroller Disadvantages

Answer 5

Cheap
Limited Memory
Limited Power
Limited Storage

Question 6

3 Types of Arduino Memory

Answer 6

SRAM - volatile, stores variables, read-write
Flash - non-volatile, stores code, read-only when running
EEPROM - non-volatile, stores data, read-write

Question 7

What is the significance of non-volatile memory

Answer 7

Non-volatile memory stays when the power is off

Question 8

P to C colons and indentation

Answer 8

Python uses colons to open a function, C uses {}

Question 9

P to C semicolons

Answer 9

C uses ; at the end of lines

Question 10

Declarations in C

Answer 10

Every variable must be declared before use

0x - hex, B - binary

Question 11

Size of ints

Answer 11

byte - 8 bit
int - 16 bit
long - 32 bit
float - 32 bit
double - 64 bit float

Question 12

Default bool type in C

Answer 12

No bool type, integers are used instead

Question 13

Comments in C

Answer 13

// - single line
/* */ - multi line

Question 14

Switch statement

Answer 14

switch (variable) { - starts switch loop

case 1: - if 1 = variable case 1 is used

break; - breaks the loop

default: - if no case is used
break;
}