C Sc 127A Practice Test Solutions, Exams of Computer Science

Download C Sc 127A Practice Test Solutions and more Exams Computer Science in PDF only on Docsity! C Sc 127A Practice Test, Spring 05 Answers int n1 = 20; int n2 = 40; a. __true_____ n1 < n2 b. __true_____ n1 != n2 c. __false_____ n1 != n2 - 20 d. __false____ 2 * n1 < n2 e. ____true_______ n1 > n2 || n2 > n1 f. ____false_______ n1 > n2 && n2 > n1 g. ____true_______ n2 >= 0 && n2 <= 100 h. ____true_______ ! "abc".equals("def"); 2. if(option != 'A' && option != 'D' && option != 'P') System.out.println ("Invalid option"); 3. Write the output generated by the following Java code (6pts) int j = 5; int k = 3; if(j > 0 || k < j) System.out.println("one"); if(k != j && k < 0) System.out.println("two"); else System.out.println("three"); 4. ONE POSSIBLE SOLUTION: assertEquals( "A", lg(101)); assertEquals( "A", lg(100)); assertEquals( "A", lg(90)); assertEquals( "B", lg(80)); assertEquals( "C", lg(70)); assertEquals( "D", lg(60)); assertEquals( "E", lg(0)); assertEquals( "?", lg(-1)); 5. ONE POSSIBLE SOLUTION public String lg(double grade) { if(grade > 100 || grade < 0 ) return "?"; else if(grade >= 90) return "A"; else if(grade >= 80) return "B"; else if(grade >= 70) return "C"; else if(grade >= 60) return "D"; else return "E"; } } 6. How many times will each of the following loops execute the iterative part “zero,” and “infinite” … int n = 1000; int j = 0; while(j <= n) { System.out.print("Hello"); j++; } 1001 int j = 5; int n = 1; for(j <= n) { System.out.print("Hello"); j--; } 0 int j = 1; int n = 5; while(j <= n) { System.out.print("Hello "); n++; } forever // Tricky Question int j = 1; while(j <= 14); { System.out.print("Hello "); j = j + 3; } 0 1 one three