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Questions and Answers
What is an array?
What is an array?
- A dynamic-size collection of elements of different data types
- A fixed-size sequenced collection of elements of the same data type (correct)
- A structure that allows easy insertions and deletions
- A single variable holding multiple values of different data types
What does the subscript for an array always begin with?
What does the subscript for an array always begin with?
- 1
- The size of the array
- 0 (correct)
- The last element of the array
What does the size indicate in the syntax 'data_type array_name [size];'?
What does the size indicate in the syntax 'data_type array_name [size];'?
- The size of the data type
- The index of the last element in the array
- The maximum number of elements that can be stored in the array (correct)
- The current number of elements in the array
What is a disadvantage of an array?
What is a disadvantage of an array?
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What makes an array very useful when working with sequences of the same kind of data?
What makes an array very useful when working with sequences of the same kind of data?
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Study Notes
Understanding Arrays
- An array is a collection of elements, typically of the same data type, stored in contiguous memory locations.
- Arrays allow for efficient storage and access of multiple items using a single variable name.
Subscript and Indexing
- The subscript for an array always begins with zero, meaning the first element is accessed with the index [0].
Array Size
- In the syntax
data_type array_name [size];, the 'size' indicates the number of elements the array can hold, determining its maximum capacity.
Disadvantages of Arrays
- A key disadvantage of arrays is their fixed size; once declared, the size cannot be changed, potentially leading to wasted space or overflow if more elements are needed than initially allocated.
Advantages of Arrays
- Arrays are particularly useful for handling sequences of the same kind of data as they allow for easy and efficient data manipulation, access, and iteration through multiple elements with a single reference.
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