22.Password Door Opening System

How many pins does a typical keypad module have?

• 3

• 4

• 5

• 6

Which library is typically used to control a servo motor in an Arduino password door control system?

• LiquidCrystal

• Keypad

• Servo

• Wire

Which component of the password door system is responsible for verifying the password entered by the user?

• Keypad

• Arduino

• Motor

• LCD screen

What is the function of a keypad in a password door system using Arduino?

• To generate random passwords

• o display the password entered by the user

• To allow the user to enter the password

• To open the door

How many rows and columns does the keypad contains?

• 2,2

• 3,4

• 4,6

• 4,4

Which of the following function will helps you to rotate the servo motor?

• servo.attach()

• servo.begin()

• servo.init()

• servo.write()

What is an array?

• collection of all integer data

• collection of similar type of data items

• similar to variable

Which of the following function will helps you to rotate the servo motor?

• servo.attach()

• servo.begin()

• servo.init()

• servo.write()