Answered: Look at the following array definition:…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Look at the following array definition: int values[10]; How many elements does the array have? What is the subscript of the first element in the array? What is the subscript of the last element in the array? Assuming that an int uses 4 bytes of memory, how much memory does the array use?

Expert Solution

Explanation

1) An array is a collection of similar data elements stored at contiguous memory locations. It is the simplest data structure where each data element can be accessed directly by only using its index number.

2) The array has a fixed size meaning once the size is given to it, it cannot be changed i.e. you can’t shrink it nor can you expand it

3) Indexing in array

First element of array is indexed by a subscript of 0
Second element of array is indexed by a subscript of 1
Nth element in array is indexed by a subscript of 1

4) Size of array depends upon the size of array and type of variables

5) We have an array in question

int values[10];
This array has 10 elements indexed from 0 to 9
Subscript of the first element in the array is values[0]
Subscript of the last element in the array is values[9]
int has size of 4 bytes, so size of array is
- 4*10 = 40 bytes

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