Transcript Test 2 study guide

Test 2: What types of questions?
• Category #1: Trace a code segment
• Category #2: Trace a complete program
• Category #3: Write a code segment
• Category #4: Write a complete program
• What should I do to prepare for the test?
 Slides
 Lecture recordings
 Lab
 Homework
 Practice
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Test 2: Sample 1
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What is the output?
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for (int i=10; i>0; i--)
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System.out.println(i);
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2
Test 2: Sample 2
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What is the exact output of this complete program?
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public class Sample1 {
public static void main (String[] args) {
int x = 3;
int y = Method(x);
System.out.println(y);
}
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public static int Method(int n) {
int result = 0;
for (int i=0; i<=n; i++)
result += i;
return result;
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}
}
3
Test 2: Sample 3
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Write a Java code segment using while loop inside the main method to print out the values from 1 to
100.
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Test 2: Sample 4
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Design and implement a Java program (name it ComputeAreas) that defines three methods as
follows:
Method squareArea (double side) determines and returns the area of a square.
Method rectangleArea (double width, double length) determines and returns the area of a rectangle.
Method circleArea (double radius) determines and returns the area of a circle.
Method triangleArea (double base, double height) determines and returns the area of a triangle.
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Test the methods with different input value read from the user (in the main method).
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Design the main method of your program such that it allows the user to re-run the program with
different inputs (i.e., use a loop structure). Document your code, and organize and space the outputs
properly. Use escape characters to organize the outputs.
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