CSA Exam Review

Consider the following code segment. int x = 20; int y = 10; int temp = x; x = y; y = temp * x; System.out.println(x + " " + y); What is printed as a result of executing this code segment?

• 10 100

• 10 200

• 20 100

• 20 200

In the following statement, j and k are properly declared and initialized int variables. boolean result = ((j > 0) && (k > 0)) || ((j < 0) && (k < 0)); Which of the following best describes the conditions in which result is assigned the value true?

• When j and k are both equal to 0

• When j and k are both positive or both negative

• When j is greater than k

• When j is positive and k is negative or when j is negative and k is positive

Consider the following Painting class. public class Painting { private int year; private String artist; private String title; public Painting(int y, String a) { year = y; artist = a; title = "Untitled"; } // There are no other constructors. } Which of the following code segments, appearing in a class other than Painting, will correctly create an instance of a Painting object?

• Painting p = new Painting("Frida Kahlo", "Self Portrait", 1939);

• Painting p = new Painting(1939, "Frida Kahlo", "Self Portrait");

• Painting p = new Painting("Frida Kahlo", 1939);

• Painting p = new Painting(1939, "Frida Kahlo");

Consider the following code segment. int first = 5 + 10 * 2; int second = first + first % 2; What is the value of second after this code segment is executed?

• 37

• 30

• 26

• 0

Consider the following code segment. double cost = 25.0; double discount = 0.0; if (cost >= 100.0) { discount = 10.0; } else if (cost >= 50.0) { discount = 5.0; } else { discount = 2.0; } System.out.println(cost - discount); What is printed as a result of executing this code segment?

• 25.0

• 23.0

• 20.0

• 15.0

Consider the following code segment. for (int j = 10; j >= 0; j -= 2) // Line 1 { // Line 2 System.out.print(j - 1); // Line 3 } // Line 4 This code segment is intended to produce only the following output. It does not work as intended. 97531 Which of the following changes can be made so that this code segment works as intended?

• In line 1, changing the condition j >= 0 to j > 0

• In line 1, changing the condition j = 10 to j = 9

• In line 3, changing the expression j - 1 to j + 1

• In line 3, changing the expression j - 1 to j - 2

Consider the following code segment. String original = "DEFGHI"; String result = /* missing code */; System.out.println(result); Which of the following expressions can be used to replace /* missing code */ so that this code segment prints the string "HIDE"?

• original.substring(4) + original.substring(0, 1)

• original.substring(4) + original.substring(0, 2)

• original.substring(5) + original.substring(1, 2)

• original.substring(5) + original.substring(1, 3)

Consider the following code segment. double w = 2.0; double x = 5.0; double y = (int) w / x; double z = (int) (w / x); System.out.println(y + ", " + z); What is printed as a result of executing this code segment?

• 0.0, 0.0

• 0.0, 0.4

• 0.4, 0.0

• 0.4, 0.4

Consider the following class definitions. public class Measurement { private int feet; private int inches; public Measurement(int numFeet, int numInches) { feet = numFeet; inches = numInches; } private int toInches() { return feet * 12 + inches; } } public class Calculations { public static boolean compare(Measurement m1, Measurement m2) { if (m1.toInches() >= m2.toInches()) { return true; } return false; } } Which of the following best explains why an error occurs when the classes are compiled?

• The compare method cannot have parameters of type Measurement.

• The compare method should be declared as void.

• The toInches method cannot be accessed from a class other than Measurement.

• The variables feet and inches cannot be accessed from the method toInches.

A computer game should print different messages based on a player's score. • "Great!" is printed for scores greater than 500. • "Good!" is printed for scores between 250 and 500, inclusive. • "Try again." is printed for scores less than 250. Assume that score is a properly declared and initialized int that represents a player's score. Which of the following code segments will print the correct message for any valid value of score?

• String message = ""; if (score < 250) { message = "Try again."; } else if (score <= 500) { message = "Good!"; } else { message = "Great!"; } System.out.println(message);

• String message = ""; if (score < 250) { message = "Try again."; } if (score <= 500) { message = "Good!"; } else { message = "Great!"; } System.out.println(message);

• String message = ""; if (score >= 250) { message = "Good!"; } else if (score > 500) { message = "Great!"; } else { message = "Try again."; } System.out.println(message);

• String message = ""; if (score > 500) { message = "Great!"; } else if (score <= 500) { message = "Good!"; } else { message = "Try again."; } System.out.println(message);