Java Fundamentals Final-Version 2

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0 Java Ftmdamentats Fmal Exa 0 Appendix P:. Self Study GUide V

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Review your answers, feedback, and question scores below. An aste1isk (*) indicates a correct answer. Section 4

(Answer all questions in this section) 1. You need to - -----Java code to generate a .class file

Collect Compile (*)

Package Assemble

~ Correct 2. You can return to the Eclipse Welcome Page by choosing Welcome from what menu?

File Edit

Help (* ) Close

~ Correct 3. For eve1y opening curly brace { there does not need to be a closing curly brace} for the program to compile without error. True or False?

True False (*)

~ C01rect 4. A workspace can not have more than one stored projects. True or false?

True False (*)

~ Correct 5. In the image below, identify the components.

1 2 3 / ** 4 * @par am args 5 * I

Outline

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Outline X Correct 3. For eve1y opening curly brace { there does not need to be a closing curly brace} for the program to compile without error. T111e or False?

EJ() 20132015 Oracle kademy Em:ll' 1!1 Section 0 Cou1.,. Resources 8 Section 1 ~ 'Welcome and lntlu.

1!1 Secbon 2 tmng Allee 3

1!1 Section 3 Using Green foot

0 & Java Fundamentals Midterm [ 1!10 Secbon ~ - Using Eclipse 1!10 Secbon 5 U5\ng Control State

1!10 Section 6 l!singArra'}Sand 1!10 Section 7- Using Recursion,

0 Java Ftmdamentats Fmal Exa 0 Appendix P:. Self Study GUide V

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00 Appendix P:. Self Study Guide II




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True False (*)

~ C01rect 4. A workspace can not have more than one stored projects. True or false>

True False (*)

~ Correct 5. In the image below, identify the components.

pac kage studyTool; ~ public c l as s Study Pa ge {

/ ** * @param args * I

public sta tic void main(String[] args )

1 2 3 4 5 6 7 8 9

1 0

//TODO Auto-generated method stub

11 12 13

}

}

A-Main Method, B-Ciass, C-Package A-Class, B-MainMethod, C-Package

A-Package, B-Main ~tethod, C-Ciass (* ) None of the above

~ Correct

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Section 4 (Answer all questions in this section)

6. The following defines a class keyword:

o Defines where this class lives relative to other classes, and provides a level of access control. Provides the compiler information that identifies outside classes used within the current class. Precedes the name of the class. (* )

G Incorrect. Refer to Section 4 Lesson 2. 7. Which of the following defines a driver class>

Contains a main method and other static methods. (*) Contains classes that define objects. Contains a main method, a package, static methods, and classes that define objects. None of the above.

~ Correct 8. Select the declaration and initialization statement that will hold the letter J.

int letter='J'; float letter='J'; String letter='J';

char letter='J'; (* ) ~ C01rect

9. What is the output of the following lines of code?

int j=6,k=8,m=2,result; result=j-k%3*m; System. out. println( result);

6 0 -42 2 (* ) ~ C01rect

10. Which of the following instantiates a String named name to Oracle>

St1ing name; St>i ng Oracle="name"; St1ing name="name";

o St>i ng name="Oracle"; (* ) ~ Correct

Outline

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Review your answers, feedback, and question scores below. An aste1isk (*) indicates a correct answer.

EJ ... () 2013-201 5 Oracle kademy Em:ll' I!J ... e Section 0 - CoUI'


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3 4 5 6

True or false? True (*)

False

~ C01rect

System.out.print l n ( "Equal" ); els e

System.out.print l n ( "Not Equal");

13. The following code is an example of instantiating a String object: String str = String( "Hello" ); True or false?

True False (*)

~ Conect 14. Given the code:

Section 5

String s = new String(" abc"); Which of the following statements will change the length of s to the largest length?

s.trim() s.replace("a", "aa") s.substring(2) s.toUpperCase()

None of the above will change the length of s. (*) ~ Conect

(Answer all Questions in this section) 15. Which of the following is true about a do-while loop?

It is a post-test loop. It is a modified while loop that allows the program to run through the loop once before testing the boolean condition.

It continues looping until the condition becomes false. All of the above. (*)

0 Incorrect. Refer to Section 5 Lesson 2. Previous I Page 3 of 10 I Next I I Summary I 0 SnapShot: p rintscreen ~ x

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Review your answers, feedback, and question scores below. An aste>isk (*) indicates a correct answer. A

EJ ... () 2013-201 5 Oracle kademy Em:ll' I!J ... e Section 0 - CoUI' What is the value of x after the loop has finished? What is the value of count after the loop has finished?

int count= 17; int x = 1; while( count > x){ x*=3; count-=3; }

4; 8; 27 3; 27; 8 (*) 5; 27; 8 5; 30; 5 3; 9; 11

~ C01rect 18. Which of the following are relational operators in Java?

(Choose all correct answers) ., < (*) ., ,, = (*)





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EJ ... () 20132015 Oracle kademy Em:ll' 1!1 .. e Section 0 Cou1.,. Resources 8 Section 1 ~ 'Welcome and lntlu.

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x* =3; count-=3; }

4; 8; 27 3; 27; 8 (*)

5; 27; 8 5; 30; 5 3; 9; 11

~ Correct 18. Which of the following are relational operators in Java?

(Choose all correct answers) ., < (*) ., , = >,,,l 13:34 ' 'l' ~ ... __ U

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Outline >< ~~~ert~:~Ja~v~a~F~u~l~ld~~~~~~~~~l~s~f~il~l~~~~~---------------------------------------------------------------------------------------------------------------------Review your answers, feedback, and question scores below. An aste>isk (*) indicates a correct answer.


True (*) False

~ Correct 22. Which of the following best describes lexicographical order>

A simple so>ting algorithm that is inefficient on large a1rays. An order based on the ASCII value of characters. (*)

A complex sorting algorithm that is efficient on large a1rays. The order of indicies after an a1ray has been sorted.

~ Correct 23. Binary searches can be pe>formed on sorted and unsorted data. True or false>

True False (*)

~ C01rect 24. A sequntial search is an iteration through the a>ray that stops at the index where the desired element is found. True or false?

True (*) False

~ Correct 25. Which of the following declares and initializes a one dimensional array named words of size 3 so that all entries can be Strings?

String strings= new String[3]; String[) word={"Over","the","mountain"} ; (*)

String[) word=new String[3); String[) words={"Oracle","Academy"});

G Incorrect. Refer to Section 6 Lesson 1.

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Outline X


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27. The following segment of code initializes a 2 dimensional arrav of ptimitive data types. True or false?

double[)[] a=new double[ 4][5]; True (*)

False

~ Correct 28. Which of the following declares a one dimensional array name scores of type int that can hold 14 values?

int scores; int[] scores= new int[14]; (* ) int[] scores= new scores int[14]; int score= new int[14]; ~ C01rect

29. What is wrong with this code?

Section 7

1 t r y{ 2 3 4 5 6 7

i f ( x < 0 ) t hr ow new Exception ("Your a nswer i s nega t i ve")i

catch { System. out.print l n ( "Enter your value a gain.");

It is missing a semicolon. It does not compile. (* )

It gives you an out of bounds exception. There is nothing wrong with this code.

~ Conect

(Answer all Questions in this section) 30. What operator do you use to call an object's constructor method and create a new object>

+ new(* )

instanceOf ~ Correct

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EJ ... () 2013-2015 Oracle kademy Em:ll' I!J ... e Section 0 - CoUI'

True False (*)

~ Correct 32. What is wrong with the following class declaration?

class Account{ ; p>ivate int number; p1ivate String name;; public Account; }

Classes cannot include strings. Classes cannot include mixed data types.

The constructor method has no definition. (*) There is nothing wrong.

~ Correct 33. Which of the following creates an instance of the class below>

1 public c lass Thi sClass 2 3 4 5 6

priva t e i nt a=4, b=S; Th i sClass ( i n t x ) (

a=x*b ;

ThisCiass t=new ThisCiass(); ThisCiass t; ThisCiass t=new ThisCiass(3,4);

ThisCiass t=new ThisCiass(S); (*) ~ Conect

34. All objects, in Java, are created using int. True or false?

True False (*)

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I!J .... Secbon 2 tmng Al>ee 3 I!J .... Section 3 tmng Green foot 0 .. f) Java Fundamentals Midterm [ 1!1 .. 0 Secbon ~ - tmng Eclipse 1!1 .. 0 Secbon 5 U5\ng Control State 1!1 .. 0 Section 6 tmngArra'}Sand 1!1 .. 0 Section 7- tmng Recursion, 0 Java Ftmdamentats Fmal Exa 0 .... Appendix P:. Self Study GUide V

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~ Correct 32. What is wrong with the following class declaration?

class Account{ ; private int number; private String name;; public Account; }

Classes cannot include st>ings. Classes cannot include mixed data types.

The constructor method has no definition. (* ) There is nothing wrong.

~ Correct 33. Which of the following creates an instance of the class below?

1 public c lass Th i sClass 2 3 4 5 6

priva t e i nt a=4 , b=S; Th i sClass ( i nt x ) (

a=x .... b ;

ThisCiass t=new ThisCiass(); ThisCiass t; ThisCiass t=new ThisCiass(3,4);

ThisCiass !=new ThisCiass(5); (* ) ~ Correct

34. All objects, in Java, are created using int. True or false?

True False (*)

~ Correct 35. A constructor is used to create objects. True or false?

True (*) False

~ Correct

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Outline

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... ? 1m -Outline ~ 20132015 Oracle Academy English Java Fundamentals- Student Outline >< ~~~ert~:~Ja~v~a~F~u~l~ld~~~~~~~~~l~s~f~il~l~~~~~------------------------------------------------------------------------------------------------------------------~

Review your answers, feedback, and question scores below. An aste1isk (*) indicates a correct answer. A

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~ 20132015 Oracle Academy English Java Fundamentals- Student Outline

Outline X

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Because you wish to be able to use that object inside of the method. It has faster pe>formance than returning a primitive type.

The method makes changes to the object and you wish to continue to use the updated object outside of the method. (* ) None of the above. It is not possible to return an object. ~ Correct

43. Which segment of code represents a correct way to call a variable argument method counter that takes in integers as its variable argument parameter>

counter(St>ing a, int b); counter(int[] numbers);

o counter(!, 5, 8, 17, 11000005); (* ) counter("one","two",String[] nums); ~ C01rect

44. Which of the following is the correct definition of a parameter?

A keyword that specifies accessibility of code. A way to call a method with a va>iable number of arguments using an elipse. A variable in a method declaration that gets passed into the method. (*) A type of access specifier. It is used to assign initial values to instance variables of a class; the structure is very similar to that of a method.

0 Incorrect. Refer to Section 7 Lesson 2. 45. Non-final static class variables should be private to prevent changes from other classes. True or false>

True (*) False

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EJ ... () 2013-201 5 Oracle kademy Em:ll' I!J ... e Section 0 - CoUI'raylist nums = new Arraylist();

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Outline X

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Java Fundamentals Final-Version 2

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