Take out a piece of paper and PEN. The quiz starts TWO minutes after the tardy bell rings. You will have 30 seconds per question. Exposure Java 2014 for Teaching AP ® Computer Science DYRT Quiz

Title the quiz as shown below The quiz starts in ONE minute. Name Period Date Quiz EC.

Question 01 In the statement int x; What is int ? (a)a variable (b)a data type (c)a class (d)an object

Question 02 In the statement int x; What is x ? (a)a variable (b)a data type (c)a class (d)an object

Question 03 In the statement Bank tom = new Bank(5000.0); Which is the class? (a)Bank (b)tom (c)new (d)5000.0

Question 04 In the statement Bank tom = new Bank(5000.0); Which is the object? (a)Bank (b)tom (c)new (d)5000.0

Question 05 How many classes are being shown in this example? (a)1 (b)2 (c)3 (d)4 (e)5 (f)10 (g)13

Question 06 How many objects are being shown in this example? (a)1 (b)2 (c)3 (d)4 (e)5 (f)10 (g)13

Question 07 Which of these statements will cause a different set of random numbers to be generated every time the program is executed? (a)Random rand = new Random(); (b)Random rand = new Random(40); (c)Random rand = new Random(12345); (d)All of the above

Question 08 Assume rand is an object of the Random class. What is the output of this statement? System.out.println(rand.nextInt(1000)); (a)1000 (b)a random number from 1 to 1000 (c)a random number from 0 to 1000 (d)a random number from 1 to 999 (e)a random number from 0 to 999

Question 09 Assume rand is an object of the Random class. What is the output of this statement? System.out.println(rand.nextInt(1001)); (a)1001 (b)a random number from 1 to 1000 (c)a random number from 0 to 1000 (d)a random number from 1 to 999 (e)a random number from 0 to 999

Question 10 Assume rand is an object of the Random class. What is the output of this program segment? int x = rand.nextInt(1000) + 1; System.out.println(x); (a)1001 (b)a random number from 1 to 1000 (c)a random number from 0 to 1000 (d)a random number from 1 to 999 (e)a random number from 0 to 999

Question 11 Which of the following are methods of the Random class? (a)nextInt (b)nextDouble (c)setSeed (d)All of the above

Question 12 The random method of the Math class behaves Just like the _____ method of the _____ class. (a)nextRnd Random (b)nextDouble Random (c)nextRandomDice (d)nextIntInteger

Question 13 The Math.random() method generates a random number x, such that (a)0 < x < 1 (b)0 <= x < 1 (c)0 <= x <= 1 (d)0 < x <= 1

Question 14 What is the output of the following statement? System.out.println( (int) (100 * Math.random() ); (a)An integer in the [1..100] range (b)An integer in the [0..100] range (c)An integer in the [1..99] range (d)An integer in the [0..99] range

Question 15 Assume rand is an object of the Random class. Which of the following statements will cause x to have a random value between 100 and 500? (a) int x = rand.nextInt(500) + 100; (b) int x = rand.nextInt(100) + 500; (c) int x = rand.nextInt(400) + 100; (d) int x = rand.nextInt(401) + 100; (e) int x = rand.nextInt(100) + 401;

Extra Credit Assume rand is an object of the Random class. Which of the following statements will cause x to have a random value in the same range as this statement: int x = rand.nextInt(1001) + 500; (a) int x = Math.random(1001) + 500; (b) int x = (int) (Math.random() * ); (c) int x = Math.random(1600) + 500; (d) int x = Math.random() * ; (e) int x = (int) (Math.random() * );