Exam 2 Review

Arrays

100

This is the type of variable for the following line of code:

int[] numbers= new int[15];

What is an int array?

200

This is the number stored in len in the following code.

char[] letters = {'a','b','c','d','e','f','g','h','i'};

int len = letters.length;

What is nine?

300

This is the line of code to print what is in the first index of following array on its own line:

String[] sentence={...};

What is

System.out.println(sentence[0]);

?

400

This is what is missing in the loop to make each index of empty a new Hole using the default constructor.

Hole[] empty = new Hole[15];

for(int i = 0; i < Hole.length; i++}

//Missing

What is

Hole[i]=new Hole();

?

500

Once an array is created and initialized, you may no longer change this.

What is the length of the array?

Loops

100

This is the value stored in k at the end of this loop.

int k=0;

for(int i=0;i<10;i++)k*=5;

What is 0?

200

This is the number of times "and then" is printed out.

for(int i=1; i<100; i*=2)

System.out.println("and then");

What is seven?

300

This is the for-loop that initializes odds to the first 57 odd numbers.

int[] odds= new int[57];

//for loop here

odd[k]=k*2+1;

What is

for(int k = 0; k<57; k++)

?

400

This is the line inside the for-loop that saves each index of left into right in the opposite order.

String[] left = {...};

String[] right = new String[left.length];

for(int b=0; b<left.length; b++)

//line to save indices in opposite order

What is

right[b]=left[left.length-b-1];

?

500

This is the number of times the following loop will print "okay".

for(int i=0; i<100; i++){

if(i%5==3)System.out.println("okay");

if(i%5==4)i*=3;

}

What is 3?

Conditional Statements

100

These are the two values for a conditional statement.

What are true and false?

200

This is the conditional statement that will make this for-loop execute 3 times.

for(int i=3; /*conditional statement*/; i--){...}

What is i>0?

or

What is i>=1?

or

What is i!=0?

300

This conditional statement cause the do-while loop to execute until the user provides a 5-character string.

Scanner userInput=new Scanner(System.in);

String word;

do{

word=userInput.nextLine();

while(/*conditional statement*/);

What is word.length()!=5 ?

400

This is the values for a and b that make this conditional statement false.

int a, b;

...

if(a<b||a>b){...}

What is when a is equal to b?

500

This is the number of times the while loop will print "maybe".

int k = 10;

while((k>0)&&((k%2)!=1)){

System.out.println("maybe");

k++;

}

What is one?

Strings

100

This is the memory location that a new String() is stored in.

What is the heap?

200

This is the segment of code to get the last character in a String called word of unknown length.

What is

word.charAt(word.length()-1)

?

300

This is the segment of code to compare the String left with the String right to see if they "look" the same.

What is 

left.equals(right)

?

400

This is the line of code to initialize a String called space to have only 3 new line characters in it.

What is

String space = "\n\n\n";

?

500

This is the line of code to take the String echo and turn it into two consecutive copies of echo.

What is 

echo+=echo;

or

echo = echo+echo;

?

Miscellaneous

100

This is the line of code to create a Scanner object named inputStream that will be used to get input from the console.

What is

Scanner inputStream = new Scanner(System.in);

?

200

This is they keyword used for a method that must be defined when inherited by another class. Hint: you put @Override above the definition.

What is abstract?

300

This is the line of code that will clear the buffer of the Scanner object called notEmpty.

What is 

notEmpty.nextLine();

?

400

This is the name of the list of variables in a method definition.

What is the parameter list?

500

This is the name of the metaphor we used to describe how JavaFX interacts with new windows.

What is the theater metaphor?