Questions and Answers of Java Concepts Late Objects

Cameras today can correct “red eye” problems caused when the photo flash makes eyes look red. Write pseudocode for an algorithm that can detect red eyes. Your input is a pattern of colors, such
Write a program that prints an animal speaking a greeting, similar to (but different from) the following: ('') / Hello \ (-)< Junior | \ Coder!/ I||
How do you discover syntax errors? How do you discover logic errors?
A television manufacturer advertises that a television set has a certain size, measured diagonally. You wonder how the set will fit into your living room. Write an algorithm that yields the
Write a program that prints a house that looks exactly like the following: + + + +-- 1||| +ー+-キ=+
Write three versions of the HelloPrinter.java program that have different compile time errors. Write a version that has a run-time error.
Suppose you received a loyalty promotion that lets you purchase one item, valued up to $100, from an online catalog. You want to make the best of the offer. You have a list of all items for sale,
Write a program that prints an imitation of a Piet Mondrian painting. (Search the Internet if you are not familiar with his paintings.) Use character sequences such as @@@ or ::: to indicate
What is the compile-time error in this program?public class Test{public static void main(String[] args){System.out.println("Hello", "World!");}}
Consider a robot that has been placed in a maze. The right-hand rule tells you how to escape from a maze: Always have the right hand next to a wall, and eventually you will find an exit. The robot
Write a program that prints a face similar to (but different from) the following: (| 00 |)
What does this program print? Pay close attention to spaces.public class Test{public static void main(String[] args){System.out.print("Hello");System.out.println("World");}}
Consider a robot that is placed in a room. The robot can:• Move forward by one unit.• Turn left or right.• Sense what is in front of it: a wall, a window, or neither.Write an algorithm that
Write a program that prints your name in Morse code, like this:.... .- .-. .-. -.--Use a separate call to System.out.print for each letter.
What does this program print?public class Test{public static void main(String[] args){System.out.println("39 + 3");System.out.println(39 + 3);}}
Write an algorithm that allows a robot to mow a rectangular lawn, provided it has been placed in a corner, like this: The robot (marked as R) can:• Move forward by one unit.• Turn left or
Write a program that prints your name in large letters, such as ** **** **** **** **** ******
On your own computer or on a lab computer, find the exact location (folder or directory name) ofa. The sample file HelloPrinter.java, which you wrote with the editor.b. The Java program launcher
Write an algorithm to create a tile pattern composed of black and white tiles, with a fringe of black tiles all around and two or three black tiles in the center, equally spaced from the boundary.
Write a program that displays your name inside a box on the screen, like this: Dave Do your best to approximate lines with characters such as | - +.
Explain two benefits of using Java over machine code.
Imagine that you and a number of friends go to a luxury restaurant, and when you ask for the bill you want to split the amount and the tip (15 percent) between all. Write pseudocode for calculating
Write a program that prints the balance of an account after the first, second, and third year. The account has an initial balance of $1,000 and earns 5 percent interest per year.
A toaster is a single-function device, but a computer can be programmed to carry out different tasks. Is your cell phone a single-function device, or is it a programmable computer?
The value of π can be computed according to the following formula:Write an algorithm to compute π. Because the formula is an infinite series and an algorithm must stop after a finite number of
Write a program that prints the product of the first ten positive integers, 1 × 2 × … × 10. (Use * to indicate multiplication in Java.)
Which parts of a computer serve to give information to the user? Which parts take user input?
You want to find out which fraction of your car’s use is for commuting to work, and which is for personal use. You know the one-way distance from your home to work. For a particular period, you
Write a program that prints the sum of the first ten positive integers, 1 + 2 + … + 10.
Which parts of a computer can store program code? Which can store user data?
You want to decide whether you should drive your car to work or take the train. You know the one-way distance from your home to your place of work, and the fuel efficiency of your car (in miles per
Write a program that prints a greeting of your choice, perhaps in a language other than English.
Explain the difference between using a computer program and programming a computer.
In the United States there is no federal sales tax, so every state may impose its own sales taxes. Look on the Internet for the sales tax charged in five U.S. states, then write a program that prints
Write a program that prints a two-column list of your friends’ birthdays. In the first column, print the names of your best friends; in the second, print their birthdays.

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