2nd year ch#5 arrays

What is an array in programming?

• A variable that stores a single value
• A collection of variables of the same type
• A data structure that stores different types
• A sequence of instructions

How is an array declared in C++?

• array<int, size> arr;
• arr[size]
• int arr[size];
• int[size] arr;

What does the size of an array determine?

• The number of elements it can store
• The type of elements it can store
• The memory location it occupies
• The operations it can perform

How are array elements accessed in C++?

• Sequentially
• Using pointer arithmetic
• By their memory addresses
• Using their indices

What is the index of the first element in an array?

• 0
• 1
• -1
• Depends on array size

How is an array initialized in C++ with constant values?

• int arr[] = {1, 2, 3};
• arr = {1, 2, 3};
• arr = [1, 2, 3];
• int arr[3] = {1, 2, 3};

How can you access the last element of an array arr with size n in C++?

• arr[n-1]
• arr[n]
• arr[0]
• arr[n+1]

How can you iterate through all elements of an array arr with size n in C++ using a for loop?

• for (int i = 0; i < n; ++i)
• for (int i = 1; i <= n; ++i)
• for (int i = 0; i <= n; ++i)
• for (int i = 1; i < n; ++i)

What is the main advantage of using arrays in programming?

• Reduced program complexity
• Easy to manipulate data
• Efficient storage of multiple values
• Improved memory management

How are arrays initialized in C++ if fewer initializers are provided than the array size?

• Missing elements are set to 0
• Compiler error
• Missing elements are set to 1
• Missing elements are set to NULL