1. PreAP Computer Science Quiz 13.01- 02
Take out a piece of paper and PEN.
The quiz starts one minute after the tardy bell rings.
You will have 30 – 60 seconds per question.

2. Title the quiz as shown below The quiz starts in ONE minute.
Name
Period
Date
Quiz
1. 8.
2. 9.
3. 10.
4. 11.
5. 12.
6. 13.
7. 14.
EC.

3. Question 01 An algorithm is a step-by-step solution to a problem.
a mathematical solution to a problem.
a program that creates poetry that rhymes.
none of the above.

4. Question 02 The random method of the Expo class is
a void class method.
a void object method.
a return class method.
a return object method.

5. Question 03 The nextInt method of the Random class is
a void class method.
a void object method.
a return class method.
a return object method.

6. Question 04
What will this program segment display if it is executed twice?
for (int j = 1; j <= 10; j++)
System.out.println(Expo.random(1,1000);
(a) 1st Execution: 10 Identical Numbers
2nd Execution: The same 10 Identical Numbers
(b) 1st Execution: 10 Different Numbers
2nd Execution: The same 10 Different Numbers
(c) 1st Execution: 10 Different Numbers
2nd Execution: A different set of 10 Different Numbers

7. Question 05
What will this program segment display if it is executed twice?
Random rand = new Random();
for (int j = 1; j <= 10; j++)
System.out.println(rand.nextInt(1000) + 1);
(a) 1st Execution: 10 Identical Numbers
2nd Execution: The same 10 Identical Numbers
(b) 1st Execution: 10 Different Numbers
2nd Execution: The same 10 Different Numbers
(c) 1st Execution: 10 Different Numbers
2nd Execution: A different set of 10 Different Numbers

8. Question 06
What will this program segment display if it is executed twice?
Random rand = new Random(4600);
for (int j = 1; j <= 10; j++)
System.out.println(rand.nextInt(1000) + 1);
(a) 1st Execution: 10 Identical Numbers
2nd Execution: The same 10 Identical Numbers
(b) 1st Execution: 10 Different Numbers
2nd Execution: The same 10 Different Numbers
(c) 1st Execution: 10 Different Numbers
2nd Execution: A different set of 10 Different Numbers

9. Question 07
What will this program segment display if it is executed twice?
Random rand = new Random(4600);
int x = rand.nextInt(1000) + 1;
for (int j = 1; j <= 10; j++)
System.out.println(x);
(a) 1st Execution: 10 Identical Numbers
2nd Execution: The same 10 Identical Numbers
(b) 1st Execution: 10 Different Numbers
2nd Execution: The same 10 Different Numbers
(c) 1st Execution: 10 Different Numbers
2nd Execution: A different set of 10 Different Numbers

10. Question 08 Random rand = new Random(4600);
Which part of the statement below is the
random seed?
Random rand = new Random(4600);
rand
new
4600
The 1st Random
The 2nd Random

11. Question 09 Random rand = new Random();
What is the output of this program segment?
Random rand = new Random();
System.out.println(rand.nextInt(5000));
a random number between 0 and 5000
a random number between 0 and 4999
a random number between 1 and 5000
a random number between 1 and 4999
a random number between 1 and 5001

12. Question 10 Random rand = new Random();
What is the output of this program segment?
Random rand = new Random();
System.out.println(rand.nextInt(5000) + 1);
a random number between 0 and 5000
a random number between 0 and 4999
a random number between 1 and 5000
a random number between 1 and 4999
a random number between 1 and 5001

13. Question 11 Random rand = new Random();
What is the output of this program segment?
Random rand = new Random();
System.out.println(rand.nextInt(301) + 500);
a random number between 300 and 500
a random number between 301 and 500
a random number between 301 and 801
a random number between 500 and 800
a random number between 500 and 801

14. Question 12 Random rand = new Random();
Which of the following statements can replace the
mystery code to display a random # from 0 to 400?
Random rand = new Random();
System.out.println( mystery code );
rand.nextInt(399)
rand.nextInt(400)
rand.nextInt(399) + 1
rand.nextInt(400) + 0
rand.nextInt(401)

15. Question 13 Random rand = new Random();
Which of the following statements can replace the
mystery code to display a random # from 30 to 70?
Random rand = new Random();
System.out.println( mystery code );
rand.nextInt(30) + 70
rand.nextInt(70) + 30
rand.nextInt(40) + 30
rand.nextInt(41) + 30
rand.nextInt(41) + 70

16. Question 14 Random rand = new Random();
Which of the following statements can replace the
mystery code to display a random 5-digit number?
Random rand = new Random();
System.out.println( mystery code );
rand.nextInt(99999)
rand.nextInt(10000)
rand.nextInt(90000)
rand.nextInt(89999)
rand.nextInt(100000)

17. Extra Credit Random rand = new Random();
What is the output of this program segment?
Random rand = new Random();
System.out.println(rand.nextInt(21) – 10);
a random number between -10 and 21
a random number between -21 and 10
a random number between -10 and 10
a random number between -21 and 21
a random number between -10 and 9 17