### Educational Exercise: Understanding Arrays and Constructors in Java#### Code Snippet```javaint[] numList = new int[50];for (int i = 0; i < 50; i++) numList[i] = 2 * i;numList[10] = -20;numList[30] = 8;```#### Question 40**What is the value of `numList.length` in the array above?**- a. 0- b. 30- c. 49- d. 50**Answer:** d. 50#### Question 41**Which of the following statements creates `alpha`, an array of 5 components of the type `int`, and initializes each component to 10?**- \(i\) `int[] alpha = {10, 10, 10, 10, 10};`- \(ii\) `int[5] alpha = {10, 10, 10, 10, 10};`- a. Only (i)- b. Only (ii)- c. Both (i) and (ii)- d. None of these**Answer:** a. Only (i)#### Question 42**Consider the following declaration.**```javaint[] list = {2, 5, 7, 8, 12, 13, 15, 18, 22, 25};```**Which of the following correctly finds the sum of the elements of `list`?**\(i\)```javaint sum = 0;for (int j = 0; j < 10; j++) sum = sum + list[j];```\(ii\)```javaint sum = 0;for (int j = 1; j <= 10; j++) sum = sum + list[j];```- a. Only (i)- b. Only (ii)- c. Both (i) and (ii)- d. None of these**Answer:** a. Only (i)#### Question 43**What is the function of the reserved word `class`?**- a. It defines a data type and allocates memory.- b. It defines only a data type; it does not allocate memory.- c. It acts as

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40. What is the value of numiList.length in the array above? 49

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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Concept explainers

Array

The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.

Question

### Educational Exercise: Understanding Arrays and Constructors in Java

#### Code Snippet
```java
int[] numList = new int[50];

for (int i = 0; i < 50; i++)
numList[i] = 2 * i;

numList[10] = -20;
numList[30] = 8;
```

#### Question 40
**What is the value of `numList.length` in the array above?**

- a. 0
- b. 30
- c. 49
- d. 50

**Answer:** d. 50

#### Question 41
**Which of the following statements creates `alpha`, an array of 5 components of the type `int`, and initializes each component to 10?**

- \(i\) `int[] alpha = {10, 10, 10, 10, 10};`
- \(ii\) `int[5] alpha = {10, 10, 10, 10, 10};`

- a. Only (i)
- b. Only (ii)
- c. Both (i) and (ii)
- d. None of these

**Answer:** a. Only (i)

#### Question 42
**Consider the following declaration.**

```java
int[] list = {2, 5, 7, 8, 12, 13, 15, 18, 22, 25};
```

**Which of the following correctly finds the sum of the elements of `list`?**

\(i\)
```java
int sum = 0;
for (int j = 0; j < 10; j++)
sum = sum + list[j];
```

\(ii\)
```java
int sum = 0;
for (int j = 1; j <= 10; j++)
sum = sum + list[j];
```

- a. Only (i)
- b. Only (ii)
- c. Both (i) and (ii)
- d. None of these

**Answer:** a. Only (i)

#### Question 43
**What is the function of the reserved word `class`?**

- a. It defines a data type and allocates memory.
- b. It defines only a data type; it does not allocate memory.
- c. It acts as

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