[PDF] AP Computer Science Chapter 2 Review Sheet - Northern Highlands PDF Test%20Review%20Solutions.pdf

AP Computer Science Chapter 2 Review Sheet 1 Know escape sequences on Test Review PDF 2 Which of the following are allowed if first you declare: int

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[PDF] AP Computer Science Chapter 2 Review Sheet - Northern Highlands

AP Computer Science Chapter 2 Review Sheet 1 Know escape sequences on Test Review PDF 2 Which of the following are allowed if first you declare: int

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AP Computer Science Chapter 2 Review Sheet

1. Know escape sequences on Test Review PDF

2. Which of the following are allowed if first you declare: int num1; and double num2;

a. num1 = 5; //This is fine b. num1 = 5.6; //Error here c. num2 = 5; //This is fine d. num2 = 5.6; //This is fine

3. How could you make choice b. from #2 legal?

- // Cast as int: num1 = (int) 5.6;

4. Given int num1 = 5 and int num2 = 2, what result is stored in num3 = num1 / num2?

- //num3 = 2

5. hat is the

difference between:

System.out.println (num1 + num2 + num3); //71

System.out.println (num3 + num2 + num1); //125

6. How could you get the output : 512? How could you get the output 17?

- System.out.println("" + x+z+y); //512 - System.out.println(z + (x+y)); //17

7. Know the String class methods on Test Review PDF.

8. in Test Review PDF.

9. Know the AEin Test Review PDF.

10. Know the Random class methods in Test Review PDF.

11. If you declare: int num1 = 5;

int num2 = 2; double average; and then compute: average = (num1 + num2)/2;

What value is stored in average?

- System.out.println(average); // 3.0

Chapter 2 Test

12. Which of the following declarations are allowed:

a. //Allowed b. //Syntax Error AE must declare type

13. Does an enumerated type allow you to define the values possible for a variable or the values

possible for a group of variables? - Values possible for a variable AE can make as many variables as you want and call back to the values in enum.

14. What does % do and what type is the result of the operation?

- Mod AE Remainder Division

15. Why do you have to be careful when doing a narrowing conversion, such as a double to an int?

- Loss of information AE does not round, chops off decimal

16. Know how to use the Scanner class.

17. What type of value does the equals method for the String class return?

- Boolean (true or false)quotesdbs_dbs3.pdfusesText_6

[PDF] [PDF] AP Computer Science Chapter 2 Review Sheet - Northern Highlands

[PDF] AP Computer Science A Java Subset - College Board