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From the list of java variable names below, select the illegal variable name.

05/11/2020 Client: papadok01 Deadline: 3 days

Question 1 (1 point)

Question 1 Unsaved

Select the line of Java code that will correctly declare a float variable named average and assign the variable a value of 3.4.

Question 1 options:

None of the above

int average; average = 3.4;

int average = 3.4D;

int average = 3.4f;

int average = 3.4;

Save

Question 2 (1 point)

Question 2 Unsaved

Select the correct line of Java code to assign 1000 to an int variable named myValue.

Question 2 options:

int myValue = 1000;

int myValue = 0x3E8;

int myValue = 0b1111101000;

All of the above

None of the above

Save

Question 3 (1 point)

Question 3 Unsaved

Which of the following is an invalid Java statement:

Question 3 options:

System.out.println("Hello, World! ");

int d = 14;

d++;

x + y/100;

None of the above

Save

Question 4 (1 point)

Question 4 Unsaved

Which of the following statements is a comment in Java

Question 4 options:

/ This is a test

public class Hello {

// This is a test. //

(String[] args)

None of the above

Save

Question 5 (1 point)

Question 5 Unsaved

Will the following Java code compile and run?

public class QuizItem { public static void main(String[] args) { final int age = 38; System.out.println("Age is " + Age); } }

Question 5 options:

Yes

No

Save

Question 6 (1 point)

Question 6 Unsaved

What is the output from the following Java code?

public class Week1Quiz {

public static void main (String[] args) {

System.out.println ("Welcome");

System.out.println ("to");

System.out.print ("UMUC!");

}

}

Question 6 options:

Welcome to UMUC!

No output as the code will not compile.

Welcome to UMUC

None of the above

WelcometoUMUC

Save

Question 7 (1 point)

Question 7 Unsaved

What character is assigned to the variable myChar in the following line of Java code?

char value = '\u0023';

Question 7 options:

#

y

null

?

X

Save

Question 8 (1 point)

Question 8 Unsaved

Will the following Java code compile and run without errors? public class QuizItem { public static void main(String[] args) { final int age = 38; age = 39; System.out.println("Age is " + age); } }

Question 8 options:

Yes

No

Save

Question 9 (1 point)

Question 9 Unsaved

You are designing a program for users to enter whole numbers that range from -200 to 2147483648. What Java data type will best satisfy this range of numbers?

Question 9 options:

int

long

byte

char

short

Save

Question 10 (1 point)

Question 10 Unsaved

Given the following sequence of Java code: int var = 4; var++; var = var + 2; var--; var = -var; What is the final value of var?

Question 10 options:

4

-6

8

-9

None of the above

Save

Question 11 (1 point)

Question 11 Unsaved

You are designing a program for users to enter whole numbers that range from -100 to 127. What Java data type will best and most efficiently satisfy this range of numbers?

Question 11 options:

int

char

byte

long

short

Save

Question 12 (1 point)

Question 12 Unsaved

Given the following sequence of Java code: int var1 = 9; int var2 = 12; boolean failure = false; int result = failure ? var1 : var2; What is the value of result after executing the code?

Question 12 options:

12

9:12

9

3

0.75

Save

Question 13 (1 point)

Question 13 Unsaved

Select the Java code that will correctly declare a boolean variable named success and assign it a value of false.

Question 13 options:

Boolean success = true;

int success = false;

None of the above

boolean success = 1;

boolean success = 0;

Save

Question 14 (1 point)

Question 14 Unsaved

Given the following sequence of Java code: int var1 = 9; int var2 = 12; int var3 = 12; Which of the following statements evaluate to true

Question 14 options:

var1 != var2

var1 < var2

var1 <= var2

var2 == var3

All of the above

Save

Question 15 (1 point)

Question 15 Unsaved

What is the output from the following Java code?

public class Week1Quiz {

public static void main (String[] args) {

System.out.print ("Welcome");

System.out.print ("to ");

System.out.println ("UMUC");

System.out.print ("!");

}

}

Question 15 options:

WelcometoUMUC

Welcome to UMUC

Welcome to UMUC !

No output as the code will not compile.

None of the above

Save

Question 16 (1 point)

Question 16 Unsaved

What Java keyword can used to create a named constant?

Question 16 options:

static

default

final

enum

public

Save

Question 17 (1 point)

Question 17 Unsaved

If we declared the following variables in Java

int age = 27; int cafe = 0xCAFE; int number1 =0b0001; What is the output for the following Java statement?

System.out.println(age + cafe + number1);

Question 17 options:

2720001

51994

54,false,A5194327

None of the above

Save

Question 18 (1 point)

Question 18 Unsaved

A non-local boolean variable is declared with the following Java code:

boolean myVar;

What is the value of myVar?

Question 18 options:

true

false

null

Unknown

None of the above

Save

Question 19 (1 point)

Question 19 Unsaved

Given the following sequence of Java code: int var1 = 4; int var2 = 6; int var3 = 10; int results = (var1 + var2) * var3 /(var1 + var3) - var2%var1; What is the values of results after executing the code?

Question 19 options:

6

5

-2

9

None of the above

Save

Question 20 (1 point)

Question 20 Unsaved

Given the following sequence of Java code: int var1 = 9; int var2 = 12; int var3 = 12; Which of the following statements evaluate to true

Question 20 options:

(var1 == var2) || (var1 < var2)

(var1 == var2) && (var1 < var2)

!(var2 == var3)

(var2 <= var3) && (var2 < var1)

None of the above

Save

Question 21 (1 point)

Question 21 Unsaved

What is the filename extension used for all Java source files.

Question 21 options:

.js

.java

.javac

.cs

None of the above

Save

Question 22 (1 point)

Question 22 Unsaved

From the list of Java variable names below, select the illegal variable name.

Question 22 options:

K149a$

2ForMe

XXXXXXXXXXXXXXYYYYYYYYYYYYYYYzzzzzzzzzzzzzzzz

Johns1290sX4k

NoneForYou

Save

Question 23 (1 point)

Question 23 Unsaved

What must be installed on a computer to be able to run bytecodes?

Question 23 options:

Java Virtual Machine (VM)

Microsoft Visual Basic

Ubuntu Server

Oracle Database (11g or higher)

None of the above

Save

Question 24 (1 point)

Question 24 Unsaved

What is the filename extension used for all Java compiled files.

Question 24 options:

.cs

.javac

.bytes

.class

None of the above

Save

Question 25 (1 point)

Question 25 Unsaved

What development tool do you use to launch Java bytecodes?

Question 25 options:

java

javadoc

javac

jconsole

All of the above

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