MIT App Inventor lesson2 Quiz_ys

What is a variable in programming?

• A fixed value in a program

• A storage location paired with a symbolic name

• A type of data that never changes

• A function used for math operations

Which of the following can a variable in MIT App Inventor store?

• Only numbers

• Only text

• Numbers, text, and logical values

• Only characters

What is the scope of a global variable?

• It can only be accessed within a function

• It can be accessed throughout the entire program

• It is not used in MIT App Inventor

• It can only be accessed within a loop

Which of the following is a math operation available in MIT App Inventor?

• Exponentiation

• Integration

• Addition, subtraction, multiplication, and division

• Fourier transform

How does MIT App Inventor handle random numbers?

• It cannot generate random numbers

• It generates random numbers between 0 and 1 only

• It generates random integers and decimals within specified bounds

• It generates random numbers only within a fixed range

What is the correct variable naming convention for a Textbox in MIT App Inventor?

• txt_[...]

• lbl_[...]

• btn_[...]

• var_[...]

Which block is used to perform arithmetic operations in MIT App Inventor?

• Logic Block

• Control Block

• Math Block

• Text Block

What is the purpose of rounding operations in MIT App Inventor?

• To approximate a number to the nearest whole number

• To increase the precision of a number

• To convert a number to text

• To generate a random number

In the in-class lab project, what should the calculator app be able to do?

• Perform advanced calculus

• Perform simple calculations like addition, subtraction, multiplication, and division

• Solve algebraic equations

• Display current date and time

What is Heron’s Formula used for in MIT App Inventor's Assignment #2?

• To calculate the perimeter of a rectangle

• To calculate the area of a triangle

• To calculate the volume of a cube

• To convert temperature units