Java Masterclass for Software Developers/

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Practice Challenges for Fun

Practice Challenges for Fun

This lesson has some challenging problems for you to solve.

We'll cover the following...

Quiz

Attempt the following quiz questions:

Consider the following if statement:

if (x > 2)
{
   if (y > 2)
   {
      z = x + y;
      System.out.println("z is " + z);
   }
}
else
   System.out.println("x is " + x);
1.

What is displayed when the values of x and y are 3 and 2, respectively?

A.

Nothing is displayed

B.

x is 2

C.

z is 7

D.

Error

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1.

How old are the people in Group 1?

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1.

What multiway if statement will decide the percentage increase of an employee’s salary based on the following merit rating scale?
  Rating     % Increase
  95 and above  5.0
  80 to 94     2.5
  Below 80    1.25

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1.

Assume that the int variable sumCode has been assigned a value. Rewrite the following multiway if statement as a switch statement:

if (sumCode == 1)
   sum = sum + 2.5;
else if (sumCode == 2)
   sum = sum + 5.0;
else if (sumCode == 3)
   sum = sum + 7.5;
else if (sumCode == 4)
   sum = sum + 10.0;
else
   sum = 0;
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Challenge 1: Read an answer to a question and react to it

Write some code that displays a question whose answer is yes or no. Read the answer as a string.

  • If the answer is yes, display You answered YES!.
  • If the answer is no, display You answered NO!.
  • If the answer is longer than three characters, display Your answer is too long!.
  • If the answer has three or fewer characters, but is not
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