What development tool do you use to launch java bytecodes?

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

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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

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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

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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

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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

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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

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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

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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;

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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

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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

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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

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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

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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

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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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