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Java
TOPIC 27 – TEST REVIEW
DETAILS & REVIEW
DETAILS
The
test covers Unit 3. All notes. All work.
All class discussion is fair game.
Your
test will be fully written. You will
not have a computer.
Minor
programming errors will not count against you.
The
Java template will be provided for you.
So you do not have to memorize the method prototype for the main
function.
REVIEW
QUESTION 1
Define
the following terms.
Iteration
Loop
Infinite loop
Control variable
QUESTION 2
What will be outputted to
screen? There may be cases where
nothing is outputted at all.
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a)
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int x = 0;
while (x > 3)
{
System.out.println(x);
x++;
}
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b)
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int y =
4;
while (y > 7)
{
System.out.println("y");
y++;
}
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c)
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int z = 10;
while (z > 0)
{
if (z % 2 == 0)
{
System.out.println(z);
}
}
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d)
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int a = 42;
if (a != 42)
{
System.out.println("yo");
}
else
{
while (a == 42)
{
System.out.println("ya");
a++;
}
}
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e)
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int a=4;
int b=3;
while (a + b < 10)
{
System.out.println(a);
a = a – 1;
b = b + 2;
}
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f)
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int a=5;
int b=5;
while (10 – b == a)
{
a++;
b--;
if (b == 2)
{
System.out.println("yoda");
}
else if (b == 1)
{
System.out.println("schmoda");
b++;
}
}
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g)
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for(int x=1; x<6; x++)
{
System.out.println(x);
}
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h)
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for(int x=1; x<4; x++)
{
int z =
10 – x;
System.out.println(z);
}
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i)
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for(int x=1; x<8; x--)
{
System.out.println(x);
}
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j)
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for(int x=1; x<31; x=x+5)
{
System.out.println(x);
}
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k)
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for(int a=2; a<9; a++)
{
if (10 % a == 0)
{
System.out.println(a);
}
}
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l)
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for(int x=1; x<3; x++)
{
for(int
y=1; y<=2; y++)
{
System.out.println("clicky");
}
}
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m)
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String
s = "***";
for(int x=1; x<=4; x++)
{
System.out.println(s+s);
}
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n)
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for(int x=1; x<=3; x++)
{
for(int
y=1; y<=3; y++)
{
System.out.println("***");
}
}
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o)
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for(int x=1; x<=3; x++)
{
for(int
y=1; y<=4; y++)
{
System.out.print("*");
}
System.out.println("");
}
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p)
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for(int x=1; x<=5; x++)
{
for(int
y=1; y<=x; y++)
{
System.out.print("*");
}
System.out.println("");
}
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q)
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for(int x=1; x<=3; x++)
{
if (x == 2)
{
System.out.print("o");
}
else if (x == 1)
{
System.out.print("camp");
}
else
{
System.out.println("
rocks");
}
}
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r)
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for(int x=1; x<=5; x++)
{
System.out.println("b");
while(x <= 2)
{
if(x % 2 != 0)
{
System.out.println("a");
}
x++;
}
}
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QUESTION 3
a) Use the while loop to output all
numbers from 1 to 15 on the screen.
b) Use the for loop to output all numbers from 1 to
15 on the screen.
QUESTION 4
Write a program that asks the user for an upper bound and a lower bound. It then asks if the user wants the even
numbers or the odd numbers and displays all such numbers that exist between
the bounds.
Sample
output:
Enter a lower number.
6
Enter a higher number.
15
Do you want odd or even numbers?
odd
Here are all odd numbers between 6
and 15:
7
9
11
13
15
QUESTION
5 (ADVANCED)
Write a program that uses nested for loops to
output a diagonal line of * as shown below.
The number of stars should be provided by the user.
Sample
output 1
How many stars?
4
*
*
*
*
Sample
output 2
How many stars?
7
*
*
*
*
*
*
*
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