Questions and Answers
What is printed as a result of executing the following code segment? System.out.println("W"); System.out.println("X"); System.out.print("Y"); System.out.print("Z");
D. W X YZ
What is printed as a result of executing the following code segment? System.out.print("cat "); System.out.println("dog "); System.out.println("horse "); System.out.print("cow ");
B. cat dog horse cow
What is printed as a result of executing the following code segment? System.out.print("Hello!"); System.out.println("How "); System.out.print("are "); System.out.print("you?");
D. Hello!How are you?
Which of the following changes can be made so that the following code segment produces the intended output? System.out.println(hello); // Line 1 System.out.print(world); // Line 2
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Which change, if any, can be made so that the following code segment can output the intended result? System.out.print("Ready"); // Line 1 System.out.print("Set"); // Line 2 System.out.print("Go!"); // Line 3
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Which of the following code segments works as intended to print the word Hello?
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Which statement correctly declares a variable that can store a temperature rounded to the nearest tenth of a degree?
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Which of the following is most appropriate to replace in the program to compute student percentages correctly? int pointsEarned; double percentage;
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Which of the following best describes the data types that should be used to replace x and y in the code segment x = 0.5; y = true;
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Which of the following can be used as a replacement for y in the code segment to print 94? int x = 3; y = ; x = 1 + 2 * y; System.out.print(x); System.out.println(y);
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Which of the following can be used to replace the code segment so that it computes the volume of a cylinder correctly?
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Which of the following replacements for top and bottom will cause an ArithmeticException to occur? int top = x - y; int bottom = y - x; System.out.print(top / bottom);
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What is the value of x when the code segment has been executed? int a = 1; int b = 2; int c = 3; int d = 4; double x = a + b * c % d;
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Which of the following arithmetic expressions evaluates to 1?
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What is printed as a result of executing the following code segment? int x = 10; int y = 20; System.out.print(y + x / y);
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Study Notes
Output of Code Segments
- Code segment printing "W", "X", "YZ" results in:
- W
- X
- YZ
- Code segment with "cat ", "dog ", "horse ", "cow " produces:
- cat dog
- horse
- cow
- Code segment with "Hello!", "How ", "are ", "you?" gives:
- Hello!How
- are you?
Modifying Print Statements
- To fix a code segment that fails to produce the output "hello" and "world", change
print
toprintln
in the relevant line. - To print "Ready", "Set", "Go!" correctly, change
print
toprintln
on the first two lines.
Variable Declaration
- Correct declaration for temperature storage:
-
double patientTemp;
-
Calculating Percentages
- Appropriate data type replacement for storing total points and percentage:
-
int totalPoints;
-
double percentage;
-
Data Type Usage
- x should be a double and y should be a boolean for proper compilation without errors.
Mathematical Expressions and Outputs
- To achieve the output "94" in a specific code segment, use:
- x + 1 as a replacement value.
- For cylinder volume calculation:
- All provided options (I, II, III) correctly compute the volume using proper formulas.
Exception Handling
- An
ArithmeticException
will occur with the replacement for top and bottom:- Option II (where bottom evaluates to zero).
Example Calculations
- The value of x from the expression involving variables a, b, c, d, evaluated as:
- Result is 3.0.
- Arithmetic expressions giving a result of 1:
- Options II (2 / (5 % 3)) and III (2 / 5 + 1) are correct.
Expression Evaluations
- Output from the code segment involving x and y result in a specific sum based on arithmetic operations.
Studying That Suits You
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Description
Test your understanding of Java output with these flashcards from the AP Computer Science A curriculum. Each card presents a code segment and asks for the expected output, helping to reinforce your programming skills.