generate random number + java

What is the code in the image?

• import java.util.Random;
• class applent
• public static void main(String[] args) {
• Random dice = new Random();

Answer explanation

The answer is (C). The code in the image is for a Java program that uses a random number generator to generate numbers between 1 and 6. The main method of the program first creates a random number generator object, and then loops 10 times. In each iteration of the loop, the program generates a random number and prints it to the console.

What is the line of code that generates a random number between 1 and 100?

• import java.util.Random;
• public class RandomNumber {
• int answer = rand.nextInt(MAX);
• System.out.println("Random number: " + answer);

Answer explanation

The answer is (C). The line of code int answer = rand.nextInt(MAX); generates a random number between 1 and 100, where rand is an object of the Random class and MAX is a constant with the value of 100.

What is the purpose of the setSeed() method in the code in the image?

• To generate a random number between 1 and 364.
• To ensure that the same random numbers are generated each time the program is run.
• To prevent the program from generating the same random numbers each time the program is run.
• To generate a random number between 0 and 363.

Answer explanation

The answer is (B). The setSeed() method in the code in the image is used to set the seed for the random number generator. The seed is a number that is used to initialize the random number generator, and it affects the sequence of random numbers that are generated. By setting the seed, the program can be guaranteed to generate the same random numbers each time it is run.

What is the range of random numbers generated by the code in the image?

• 0 to 49
• 1 to 50
• 7 to 42
• 0 to 9

Answer explanation

The answer is (A). The code in the image uses the nextInt() method of the Random class to generate random numbers. The nextInt() method generates a random number between 0 and the specified upper bound, which in this case is 50. Therefore, the range of random numbers generated by the code in the image is 0 to 49.

What is the name of the class that contains the code in the image?

• RandomNumbersDemo
• RandomNumbers
• Numbers
• Demo

Answer explanation

The answer is (A). The code in the image is contained in the RandomNumbersDemo class. The RandomNumbersDemo class is declared on line 1 of the image.

What is the value of the variable randomnum after the code in the image is executed?

• 0.09112701489
• 0.123456789
• 1
• 100

Answer explanation

The answer is (A). The value of the variable randomnum after the code in the image is executed is 0.09112701489411879. This is because the code in the image uses the nextDouble() method of the Random class to generate a random double number between 0.0 and 1.0. The value of randomnum will be different each time the code is executed.

What is the purpose of the randomNum() method in the image?

• To generate a random number between 188 and 2008.
• To print a random number between 188 and 2008 to the console.
• To generate a random number between 0 and 2008, inclusive.
• To generate a random number between 188 and 2008, exclusive.

Answer explanation

The answer is (A). The purpose of the randomNum() method in the image is to generate a random number between 188 and 2008, inclusive. The method first creates a random number generator object, and then uses the nextInt() method to generate a random number between 0 and 2008, inclusive. The method then adds 188 to the result of the nextInt() method to ensure that the random number is between 188 and 2008, inclusive.

What is the name of the program in the image?

• Main
• Application
• Random
• MVPJava

Answer explanation

The answer is (A). The name of the program in the image is Main. This is because the class that contains the code in the image is called Main. The class name is declared on line 3 of the image.

What is the name of the variable that is used to store the atmospheric random number?

• randomInt
• atmosphericRandom
• Application
• Main

Answer explanation

The answer is (A). The variable that is used to store the atmospheric random number is called randomInt. The variable is declared on line 10 of the image.

How many random numbers are printed to the console?

• 5
• 10
• 15
• 20

Answer explanation

The answer is (A). There are 5 random numbers printed to the console. This is because the code in the image creates a loop that iterates 5 times. In each iteration of the loop, the code generates a random number and prints it to the console.