### Recursive Method Output Analysis**Problem Statement:**Consider the following method: What is printed by the call `test_b(4)`?```javapublic static void test_b(int n){ if (n > 0) test_b(n - 2); System.out.println(n + " ");}```1. **42**2. **420**3. **24**4. **024**5. **02****Explanation:**The `test_b` method is a recursive function that follows these steps:1. Checks if `n` is greater than 0.2. If `n` is greater than 0, it calls itself with the argument `n - 2`.3. Prints the value of `n` followed by a space.**Step-by-Step Execution for `test_b(4)`**:1. `test_b(4)` is called. - `n` = 4, which is greater than 0. - Calls `test_b(2)`.2. `test_b(2)` is called. - `n` = 2, which is greater than 0. - Calls `test_b(0)`.3. `test_b(0)` is called. - `n` = 0, which is not greater than 0. - Does not make another recursive call. - Prints "0 ".4. Returning to `test_b(2)`. - Prints "2 ".5. Returning to `test_b(4)`. - Prints "4 ".The complete output is "0 2 4", which corresponds to the fourth option:**Correct Answer: 4. 024**

Answered: Consider the following method: What is…

Consider the following method: What is printed by the call test_b(4)? public static void test_b(int n) { if (n>0) test_b(n-2); System.out.println(n + " "); } 042 0420 024 0024 002

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

Math class and its different methods

Java math class consists of arithmetic math methods that performs basic numeric operations such as finding the maximum or minimum of two values, rounding values, logarithmic functions, square root, and trigonometric functions, etc. The Math library functions can be accessed using the header Java.lang.Math. These math methods under Java math class are for our convenience.

Question

### Recursive Method Output Analysis

**Problem Statement:**
Consider the following method: What is printed by the call `test_b(4)`?
```java
public static void test_b(int n)
{
if (n > 0)
test_b(n - 2);
System.out.println(n + " ");
}
```

1. **42**
2. **420**
3. **24**
4. **024**
5. **02**

**Explanation:**

The `test_b` method is a recursive function that follows these steps:
1. Checks if `n` is greater than 0.
2. If `n` is greater than 0, it calls itself with the argument `n - 2`.
3. Prints the value of `n` followed by a space.

**Step-by-Step Execution for `test_b(4)`**:

1. `test_b(4)` is called.
- `n` = 4, which is greater than 0.
- Calls `test_b(2)`.

2. `test_b(2)` is called.
- `n` = 2, which is greater than 0.
- Calls `test_b(0)`.

3. `test_b(0)` is called.
- `n` = 0, which is not greater than 0.
- Does not make another recursive call.
- Prints "0 ".

4. Returning to `test_b(2)`.
- Prints "2 ".

5. Returning to `test_b(4)`.
- Prints "4 ".

The complete output is "0 2 4", which corresponds to the fourth option:

**Correct Answer: 4. 024**

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