Understanding C++ Arrays

What is the primary purpose of using an array in C++?

• To define classes

• To store multiple values in a single variable

• To modify strings

• To create functions

How do you declare an array of integers named 'numbers' with 5 elements?

• int numbers[5];

• int[5] numbers;

• int[] numbers = { five };

• numbers[5];

Given the array 'string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};', which index gives you 'Ford'?

• A. 3

• B. 2

• C. 0

• D. 1

How can you change the value of the first element in the array 'vehicles'?

• vehicles.add(0, "NewValue");

• vehicles(0) = "NewValue";

• vehicles."NewValue";

• vehicles[0] = "NewValue";

Which loop mechanism is appropriate for going through every element in an array?

• while loop

• do-while loop

• for loop

• recursive function

What does the 'sizeof()' function return when used on an array?

• The number of elements in the array

• The size of the array in bytes

• The size of the first element in the array

• The size of the pointer to the array

In what scenario would the for-each loop be preferred over traditional loops?

• When you require index access for each element

• When the main goal is to read every item in the array

• When you need to modify elements during the loop

• When dealing with multi-dimensional arrays

What type of data can an array of integers hold?

• Only integer values

• Float and integer values

• Strings and integers

• Characters and strings

If 'int myNumbers[5] = {1,2,3,4,5};', what is the correct way to find the number of elements in 'myNumbers'?

• sizeof(myNumbers) / sizeof(myNumbers[0]);

• myNumbers.length();

• find_length(myNumbers);

• sizeof(myNumbers) / sizeof(myNumbers);

What is the output of 'cout << cars[1];', if 'string cars[4] = {"Toyota", "Nissan", "Honda", "Ford"};'?

• Honda

• Nissan

• Ford

• Toyota