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Java
TOPIC 04 – TEST I REVIEW
DETAILS & REVIEW
DETAILS
The test
covers the units on Programming Basics, If Statements and Loops from the
grade 11 course. All notes. All work.
Your test
will be fully written. You will not
have a computer. You do not need to
remember any import statements.
Minor
programming errors will not count against you.
REVIEW
QUESTION 1
You should be
aware of the meaning of the following terms.
The light gray terms are less likely to appear on the test.
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Programming
language
Computer
program
Syntax
Statement
Machine
language
High
level language
Source
code
Compiler
Interpreter
Java
compiler
Java
virtual machine
IDE
Main
function/method
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Output
statement
Indenting
Variable
Data
type
Declaring a
variable
Initializing
a variable
Assignment
statement
Literals
Arithmetic
expression
String
Function
argument
Function
return-type
Function
call
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Boolean
variable
Boolean expression
Control
flow structure
Condition
Conditional operator
Iteration
Loop
Infinite
loop
Control
variable
Java
Run-time Environment
Java
Development Kit
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QUESTION 2
What do the
following abbreviations/symbols stand for?
IDE
JDK
JRE
>
>=
<
<=
==
!=
!
&&
||
!
%
QUESTION 3
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;
if (x >= 0)
{
System.out.println("A");
}
System.out.println("B");
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b)
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int x = 0;
if (x >= 0)
{
System.out.println("A");
}
else
{
System.out.println("B");
}
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c)
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int x = 10;
if (x > 0)
{
System.out.println("A");
}
else if (x > 5)
{
System.out.println("B");
}
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d)
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int x = 10;
if (x > 0)
{
System.out.println("A");
}
if (x > 5)
{
System.out.println("B");
}
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e)
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int x = 0;
while (x > 3)
{
System.out.println(x);
x++;
}
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f)
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int y = 4;
while (y > 7)
{
System.out.println("y");
y++;
}
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g)
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int z = 10;
while (z > 0)
{
if (z % 2 == 0)
{
System.out.println(z);
}
}
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h)
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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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i)
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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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j)
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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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k)
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for(int x=1;
x<6; x++)
{
System.out.println(x);
}
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l)
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for(int x=1;
x<4; x++)
{
int z = 10 – x;
System.out.println(z);
}
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m)
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for(int x=1;
x<8; x--)
{
System.out.println(x);
}
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n)
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for(int x=1;
x<31; x=x+5)
{
System.out.println(x);
}
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o)
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for(int a=2;
a<9; a++)
{
if (10 % a == 0)
{
System.out.println(a);
}
}
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p)
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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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q)
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String s =
"***";
for(int x=1; x<=4; x++)
{
System.out.println(s+s);
}
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r)
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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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s)
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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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t)
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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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u)
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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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v)
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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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w)
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int x = 5;
int y = 2;
System.out.println(5/2);
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x)
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int x = 5;
int y = 2;
double z = 5/2;
System.out.println(z);
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QUESTION 4
Write the
following programs.
Reminder
about Scanner: The Scanner class does not correctly read an int and then a
line (String). You can either use two
Scanner objects or you can read all inputs as Strings and convert them to int
or double afterwards. Ask your teacher
for help. Note that you do not need to
worry about this on the test.
a)
Ask
the user for their age. Then ask the
user if their bday has passed yet this year. Use the info to calculate and output the
year of their birth.
Sample output:
How old are you?
12
Has your bday
passed this year (n/y)?
n
You were born in the year 2000.
b)
Ask
the user for the name of an item, its price and the tax rate (3 inputs in
total). The program should output a
sentence with the items name and it’s full price after taxes.
Here is some sample output:
Enter your item’s name:
Socks
Enter the price:
4.00
Enter the tax rate (whole number):
13
Socks cost 4.52 in total.
Write the program that asks the user
for the current hour during the day.
It then asks if it is in the AM or PM.
Based on the provided information, the program outputs one of the
following messages:
11PM
to 3AM – Get to bed!
4AM to 6AM – Already up?
7AM to 11AM – Good morning
12PM to 5PM – Good afternoon
6PM to 10PM – Good evening
QUESTION 5
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 6
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
7
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
*
*
*
*
*
*
*
QUESTION 8
Alter your program from Question 7 so that your line is outputted in the
opposite direction.
Sample output
How many stars?
6
*
*
*
*
*
*
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