JAVA basics

System.out.println or next.Int( ) or close( ) are examples of:

In the following sample code, how do you best describe the "Scanner":

public class squares {

public static void main(String[] args) {

java.util.Scanner scanner = new java.util.Scanner(System.in);

int num = 0;

System.out.print("Please enter a number: ");
num = scanner.nextInt();

scanner.close();

In the sample code below, what best describes num ?

public static void main(String[] args) {

java.util.Scanner scanner = new java.util.Scanner(System.in);

int num = 0;
int result = 0;

System.out.print("Please enter a number: ");
num = scanner.nextInt();

result = num * num;

scanner.close();
}

}

All is (are) true of pseudocode except:

How do you assign a variable?

What is wrong with the following code:
System.out.println("The quick brown fox" + "jumped over the \n" "slow moving hen.");

which is NOT a valid statement

Which of the following will fix the code below:

final int x = 22, y = 4;

y += x;

System.out.println("x = " + x + ", y = " + y);

How can you output quotation marks around green ("green") in the System.out.println() method:

How do you define a method?

In the following code, System.out.println(num) is an example of:

double num = 5.4;

System.out.println(num);

num = 0.0;

If method A calls method B, and method B calls method C, and method C calls method D, when method D finishes, what happens?

When an argument is passed to a method:

In the following code, Integer.parseInt(str), is an example of:

int num;

string str = "555";

num = Integer.parseInt(str) + 5;

If chr is a character variable, which of the following if statements is written correctly?

To do a case insensitive compare which of the following could be used to test the equality of two strings, str1 and str2?

What would be the value of x after the following statements were executed?

int x = 10;

switch (x)

{

case 10:

x += 15;

case 12:

x -= 5;

break;

default:

x *= 3;

}

What will be displayed to the screen with the following statements?

System.out.print("$%,.4f", 4452.34246);

What will be the value of x after the following code is executed? If the code has any kind of syntax error, please type in the answer “error”.
int x = 10
if (x>5) {
x /= 10;
}
if (x<5) {
x += 5;
}
if (x > 10) {
x -=4;
}
else {
x+=4;
}

An if statement's alternative path is implemented with _______.

The part of a method that is a collection of statements that are performed when the method is executed is called the method _______.

When a primitive data type argument is passed to a method, it is passed by _______.

When an object, such as a String, is passed as an argument, it is passed by

What will be the values of x and y as a result of the following code?

int x = 25, y = 8;

x += y++;

What will be printed after the following code is executed?

for (int number = 5; number <= 15; number +=3)

System.out.print(number + ", ");

UML diagrams does contain

Unified Modeling Language which is used in object oriented software engineering.

You should not define a class field that is dependent upon the values of other class fields:

Instance methods do not have this key word in their headers:

It is common practice to use a ________ variable as a size declarator

What will be the value of x[8] after the following code has been executed?

final int SUB = 12;

int[] x = new int[SUB];

int y = 100;

for(int i = 0; i < SUB; i++)

{

x[i] = y;

y += 10;

}

Java performs ________, which means that it does not allow a statement to use a subscript that is outside the range of valid subscripts for the array.

What will be the results of the following code?

final int ARRAY_SIZE = 5;

double[] x = new double[ARRAY_SIZE];

for(int i = 1; i <= ARRAY_SIZE; i++)

{

x[i] = 10.0;

}

What would be the results of the following code?

int[] x = { 55, 33, 88, 22, 99,

11, 44, 66, 77 };

int a = 10;

if(x[2] > x[5])

a = 5;

else

a = 8;

What would be the results of the following code?

int[] array1 = new int[25];

… // Code that will put values in array1

int value = array1[0];

for (int a = 1; a < array1.length; a++)

{

if (array1[a] < value)

value = array1[a];

}

What do you normally use with a partially-filled array?

To return an array of long values from a method, use this as the return type for the method.

In order to do a binary search on an array:

What is the value of scores[2][3] in the following array?

int [] [] scores = { {88, 80, 79, 92}, {75, 84, 93, 80},

{98, 95, 92, 94}, {91, 84, 88, 96} };

The part of a method that is a collection of statements that are performed when the method is executed is called

An array has a/an __________ size

An ArrayList has a fixed or dynamic size

When trying to access an element of an array, Java performs array _____ checking to make sure the subscript of the element exists

Given an array variable with the name kiwi, what is the code to get the amount of elements in kiwi?

Given an ArrayList variable with the name kiwi, what is the code to get the amount of elements in kiwi?

Given a String variable with the name kiwi, what is the code to get the amount of characters in kiwi?

Classes have _______ which store data

What is the term used for the character that separates tokens?

What will be the value of x after the following code is executed?

int x, y = 2, z = 3;
x = (++y)*(++z);

How many times will the following do-while loop be executed?

int x = 5;
do
{ x*=2;} while (x > 10)

What will be the value of x after the following code is executed? If the code has any kind of syntax error, please type in the answer "error".
int x = 1;
while (x++ < 10) {
x++;
}

How many times will the following for loop be executed?

for (int count = 1; count <= 7; count += 3) {System.out.println("Java is great!!!");}

What will the following code output to the console?

int [ ] integers = new int [5];
System.out.println(integers[0]);

What will the following code output to the console?
ArrayList<Integer> integers = new ArrayList<>(5);
System.out.println(integers.get(0));

What is the output?

ArrayList<Integer> integers = new ArrayList<>();
integers.add(5);
integers.add(7);
integers.add(1,18);
integers.remove(0);
System.out.println(integers.get(0));

What's the output?

ArrayList<String> strings = new ArrayList<>();
strings.add("hi");
strings.add("bye");
strings.add("howdy");
strings.remove(0);
System.out.println(strings.get(2));

What is the output?

int[ ] integers = {1,2,3,4,5};
for (int i = 0; i< integers.length; i++) {
integers [i]++;
}
System.out.println(integers[3]);

What is the output?

int[]integers = new int[10];
final int AMOUNT_OF_RUNS = 20;
final int ADD_ME = 5;

for (int i = 0; i < AMOUNT_OF_RUNS; i++) {
integers[i] += ADD_ME;
}
System.out.println(integers[3]);

What is the output?

int [ ] integers = new int [10];
final int ADD_ME = 5;

for (int i = 0; i< integers.length; i++) {
integers [i] += ADD_ME*1;
}
System.out.println(integers[4]);

What is the output?

int [ ] [ ] integers = { { 14, 5, 21}, {34, 54}, {3, 6, 7}};
int total = 0;
for (int row = 0; row<integers.length; row++) {
for (int col = 0; col<integers[0].length; col++) {
total += integers[row][col];
}
}
System.out.println(total);

What is the output?
int [ ] [ ] integers = { { 14, 5, 21}, {34, 54}, {3, 6, 7}};
int mysteryVariable = 0;
for (int row = 0; row<integers.length; row++) {
for (int col = 0; col<integers[row].length; col++) {
mysteryVariable++;
}
}
System.out.println(mysteryVariable);

what is the output?

int [] [] integers = {{14,5,21{, {34, 54}, {3,6,7}};
int mysteryVariableOne = integers [0][0];
int mysteryVariableTwo = integers [0][0];
for (int row = 0; row < integers.length; row++) {
for (int col = 0; col <integes[row].length; col++) {
if (mysteryVariableOne < integers[row][col]) {
mysteryVariableOne = integers[row][col];
}
if (mysteryVariableTwo> integers[row][col]) {
mysterVariableTwo = integers[row][col];
}}}

System.out.println(myseryVariableOne - mysteryVariableTwo);

Output?

static ArrayList<String> listOfStrings;

public static void main (String[ ] args) {
String [ ] strings = {"D", "Z", "G", "P", "M" };
for (String s : strings)
listOfStrings.add(s);
System.out.println(listOfStrings.get(2));
}

Output?

static ArrayList<String> listOfStrings;

public static void main (String[ ] args) {
String [ ] strings = {"D", "Z", "G", "P", "M" };
ArrayList<String> listOfStrings = new ArrayList<>();
for (int i = strings.length-1; i>0; i--) {
listOfStrings.add(strings[i] + strings[i-1]);
System.out.println(listOfStrings.get(2));