Chapter 4--arrays, Loops, Logic

Question 0

How do you add elements to the array?

Answer 0

Integer[] booger=new Integer[2];
booger[0]=new Integer(2);
booger[1]=new Integer(7);

Question 1

Can you have different data types in am array?

Answer 1

No

Question 2

What is the default value for integers?

Answer 2

Zero

Question 3

Variable scope?

Answer 3

The part of a program where a variable exists and can be used

Question 4

Create a basic if statement that prints a string if specific conditions exist.

Answer 4

if ( farts.length>1{
System.out.println(“yizznar”);
}

Question 5

Code a basic if else statement

Answer 5

String jomama;
int holesfilled;
if (holesfilled=1){
    System.out.println("mom banged!")
}

Question 6

What is a common mistake when programming loops?

Answer 6

Putting a semicolon at the end of the for statement. This should only be done if the loop needs no body.

Question 7

Give the basic format for a loop, and code a short loop

Answer 7

for (initialization; test; increment){
statement;
}

int age;
for (age=0; age);

Question 8

what does System.out.format do?

Answer 8

Prints with number formatting

Question 9

Is else if at the same tab level as if?

Answer 9

Yes

Question 10

What are the data types usable as the test variable for a switch?

Answer 10

byte, short, int, char, String class

Question 11

Code a basic switch

Answer 11

int dicksize=6;
switch (dicksize){
    case 4:
        System.out.println("it\'s small");
        break;
    case 12:
        System.out.println("it\'s big");
        break;
    default:
        System.out.println("it\'s meh");
}

Question 12

Code a switch where multiple values need to execute the same statement.

Answer 12

int dicksize=6;
switch (dicksize){
    case 1:
    case 2:
    case 3:
    case 4:
        System.out.println("it\'s small");
        break;
    case 12:
        System.out.println("it\'s big");
        break;
    default:
        System.out.println("it\'s meh");
}

Question 13

Give the format of a ternary operator, and code an example.

Answer 13

test ? trueresult : falseresult;

if the test is true, the trueresult is returned. Otherwise, the falseresult is returned. e.g.,

int vern=oBama>rOmney ? truth : lies;

Question 14

How do you create an array the shortcut way?

Answer 14

int[] butthead={1994, 2007, 2017};

Question 15

Code a while loop

Answer 15

while dick<15{
dick=dick+1;
}

Question 16

Code a do-while loop

Answer 16

int vern=7;
do{
    vern+=7;
    System.out.println(vern + " ");
}while (vern<49);

Question 17

What are the values in an array Initialized to? Numeric, Boolean, char, and objects

Answer 17

Zero, false, ‘\0’, and null

Question 18

When you move around values in an array of objects, are you copying values, or reassigning references? Are there exceptions to this?

Answer 18

Reassigning references. String objects are the exception