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3. Variables

Q) Which of the following is a valid variable name in C++?

a) countCars&Trucks
b) numberFarmersInRegion2
c) 10BiggestProvincesPopulationAverage
d) return

(Demo Copilot answering this questions!)

Q) If there are 5 adults holding a total of 12 babies, which of the following statements best creates a variable which stores how many babies each adult is holding?

a) double numHolding = 12.0 / 5.0;
b) int numHolding = 5 / 12;
c) int numHolding = 12 % 5;
d) int numHolding = 12 / 5;

Q) Given the following variable:

CPP
   string medicine = "Aspirin";

Which of the following C++ statements prints the character A?

a) println(medicine[0]);
b) println(medicine[0] + 'A');
c) println(medicine[1]);
d) println(medicine.length());

Q) Given the following variable declaration:

CPP
    int cost = 120;

What statement displays "$ 120CAD"?
Note one space between $ and the number.

a) println("{$:4}CAD", cost);
b) println("$4{}CAD", cost);
c) println("${:4}CAD", cost);
d) println("${4}CAD", cost);

Q) Consider the following C++ statements:

CPP
    int age;
    println("{}", age);

What is the output of this program?

a) 0
b) Either 0 or 1
c) Prints nothing
d) None of the above

Answers

b) numberFarmersInRegion2
d) int numHolding = 12 / 5;
a) println(medicine[0]);
c) println("${:4}CAD", cost);
d) None of the above