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ICS 111

0. ICS 111. Midterm 1 Review. :00. This class is ICS111. 0. True False. :00. Variable names should be descriptive and readable. 0. True False. :00. line of Java code “// System.out.println("Hello");” will. 0. do nothing cause "Hello" to be output cause a syntax error

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ICS 111

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  1. 0 ICS 111 Midterm 1 Review

  2. :00 This class is ICS111 0 • True • False

  3. :00 Variable names should be descriptive and readable 0 • True • False

  4. :00 line of Java code “// System.out.println("Hello");” will 0 • do nothing • cause "Hello" to be output • cause a syntax error • cause "(Hello)" to be output • there is no way to know without executing this line of code

  5. :00 Is this a valid Java identifier?RESULT 0 • Yes • No • Yes but it doesn’t follow the Java coding standards • What is an identifier?

  6. :00 Is this a valid Java identifier?black&white 0 • Yes • No • Yes but it doesn’t follow the Java coding standards

  7. :00 The // comment runs to the end of the line only. 0 • Yes • No

  8. :00 What output is produced by the following statement?System.out.println(“50 plus 25 ” + 50+25); 0 • 50 plus 25 5025 • 50 plus 25 75 • There will be an error

  9. :00 What output is produced by the following statement?System.out.println(“50 plus 25 ” + (50+25)); 0 • 50 plus 25 5025 • 50 plus 25 75 • There will be an error

  10. :00 What value is contained in the int variable size after this is executed:size = 18;size = size + 12;size = size/4; 0 • This will generate an error • 30 • 7 • 7.3 • 8

  11. :00 What value is contained in the float variable depth after the following statements are executed?depth = 2.4;depth = 20 – depth; 0 • 17 • 18 • 17.6 • There will be an error

  12. :00 int iResult;int num1 = 25;int num4 = 5;iResult = num1/num4; 0 • 4 • 4.0 • 5 • 0 • No idea 

  13. :00 int iResult;int num1 = 25;int num4 = 5;iResult = num4/num1; 0 • 4 • 0.2 • 5 • 0 • No idea , again…

  14. :00 float fResult = 0;int num1 = 25;int num4 = 5;fResult = num1/num4; 0 • 4 • 4.0 • 5 • 0 • error

  15. :00 float fResult = 0;int num1 = 25;int num4 = 5;fResult = num4/num1; 0 • 4 • 4.0 • 5 • 0 • error

  16. :00 float fResult = 0;int num1 = 25;int num4 = 5;fResult = (double)num4/num1; 0 • 4 • 4.0 • 5 • 0 • error

  17. :00 float fResult = 0;int num1 = 25;int num4 = 5;fResult = (float)num4/num1; 0 • 4 • 4.0 • 5 • 0.2 • error

  18. :00 int num3 = 21;int num4 = 5;int iResult =0;int iResult = num3%num4; 0 • 4 • 0 • 1 • 2 • error

  19. :00 I like this class. 0 • Yes • No

  20. :00 I am learning UNIX 0 • Yes • No

  21. :00 I will recommend my friends to take this class 0 • Yes • No way Jose • I’m waiting for the first midterm exam result.

  22. :00 String s = “Hello World”;s.substring(3);System.out.print(s);//what will be printed? 0 • llo World • lo World • l • Hello World

  23. :00 String s = “Hello World”;System.out.print(s.substring(3));//what will be printed? 0 • llo World • lo World • l • I have no clue.

  24. :00 String s = “Hello World”;System.out.print(s.substring(0));//what will be printed? 0 • Hello World • elloWord • An error will occur • I don’t want to think right now.

  25. :00 String s = “Hello World”;System.out.print(s.length( ));//what will be printed? 0 • 10 • 11 • 12 • I’m sleeping…zzzz

  26. :00 String s = “Hello World”;System.out.print(s.indexOf(‘a’));//what will be printed? 0 • There will be an error • 0 • -1 • 11

  27. :00 String s = “Hello World”;System.out.print(s.substring(3,4));//what will be printed? 0 • llo World • lo World • l • Please, stop it!!!

  28. :00 String s = “Hello World”;System.out.print(s.charAt(0));//what will be printed? 0 • H • d • l • There will be an error

  29. :00 String s = “Hello World”;System.out.print(s.charAt(-1));//what will be printed? 0 • H • d • A blank • There will be an error An IndexOutOfBoundsException

  30. :00 We import packages (Java libraries) so that we do not have to re-invent the wheel. 0 • True • False

  31. :00 When using the DecimalFormat class, using # and using 0 is the same 0 • True • False

  32. :00 When using the DecimalFormat we can even add units to the numbers that we are formatting 0 • True • False

  33. :00 Random gen = new Random( );int num;num = gen.nextInt( ); 0 • Will generate a number between 0 and the highest int number. • Will generate a number within the whole int range • Will generate a number between 0 and 1

  34. :00 Random gen = new Random( );int num;num = gen.nextInt(20);//will generate a number between: 0 • 0 and 19 • 0 and 20 • 1 and 19 • 1 and 20 • Can’t count now. Java is zero based

  35. :00 Random gen = new Random( );int num;num = gen.nextInt(20)+5;//will generate a number between: 0 • 5 and 25 • 4 and 19 • 5 and 25 • 5 and 24 • 4 and 25

  36. :00 Are you ready for the midterm now? 0 • Yes • No • Just a little bit • Now I know that I don’t know. • What midterm?

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