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JAVA 100 Tests, Answers & Explanations: A Beginner's Guide, by Ray Yao
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“The Java 100 Tests; Answers & Explanations” is a useful book for beginners. This book can help you to:
Pass the final examination;
Pass the job interview examination;
Pass the engineer certification examination;
In this book, you can test:
Java Basic; Control Statement; Array; Function; If, Switch statement; For, While loop; Class, Object, Method & Interface; String & StringBuffer; Exception; Input & Output
……
- Sales Rank: #4422708 in Books
- Published on: 2016-01-21
- Original language: English
- Number of items: 1
- Dimensions: 9.25" h x .34" w x 7.50" l, .60 pounds
- Binding: Paperback
- 150 pages
About the Author
About the Author Ray Yao: Certified PHP engineer by Zend, USA Certified JAVA programmer by Sun, USA Certified SCWCD developer by Oracle, USA Certified A+ professional by CompTIA, USA Certified ASP. NET expert by Microsoft, USA Certified MCP professional by Microsoft, USA Certified TECHNOLOGY specialist by Microsoft, USA Certified NETWORK+ professional by CompTIA, USA
Most helpful customer reviews
1 of 1 people found the following review helpful.
Put your JAVA skills to the test.
By Steven Holt
I've been learning a lot a bout JAVA programming and I've been getting really good from little guides like this one. This book contains multiple choice questions concerning JAVA questions. I wouldn't get this book if you are an absolute beginner since this book is more for people who want to test and sharpen their JAVA skills. I got this book along with some beginner guides so I would be able to be absolutely confident in my ability to program using JAVA. The difficulty of the questions range from fairly easy to pretty hard. This guide was great for learning about most of the ambiguities in the JAVA language (even though there aren't many since it's a pretty straightforward language. Overall I put my skills to the test with this helpful guide
0 of 0 people found the following review helpful.
sad resentment that I was feeling when working with this
By Igor Soudakevitch
One of the most disappointing books I've ever bought in my entire life :(((
As I am going to take the OCA 1Z0-808 exam in a few months, I practice on as many mock exam questions as I can find so this book was a natural candidate for my self-studies. Can't even start describing my bewilderment, then anger and, finally, sad resentment that I was feeling when working with this... this error-ridden travesty.
I wouldn't say a word against this parody of a book if it were available for free on some Java coders' forum --- but it isn't. The author wants you to pay him for his 'labor'. Well, I did... only to found out that Mr.Rao Yao is:
- extremely... unbelievably... mind-bogglingly sloppy with his syntax;
- unable to express most simple rules in standardized terms; and
- full of if not contempt then complete disregard for his readers' needs.
Now, the above statements of mine are, of course, pure emotion. Here comes the hard evidence.
The book (I'm talking about the Kindle version, btw) contains at least 43 errors (yes, I was chasing, counting and writing them down) ranging from silly typos to most profound, deeply disturbing and fundamental absurdities. I didn't read the last chapter, 'Input & Output' (because this topic isn't on the 808 exam), so the number of faults is quite likely to be even higher. Some questions contain multiple errors, even.
I'm not going to list every single one of them, of course; a couple of samples should suffice by giving you general idea. The spelling, wording and so on aren't mine, I'm simply copypasting. Alright, here we go; selecting random page...:
Page 110, Chapter 6 String & StringBuffer, Q1
// ************************************************
What is the output in the following code?
public class test{
public static void main (String args[ ]){
Sting s1=new String(“ok”);
Sting s2=new String(“ok”);
if (s1==s2){
System.out.print(“equal”);
}
else{
System.out.print(“not equal”);
}
}
}
1. no output
2. equal
3. not equal
4. compile failure
Answer: C
Explanation:
“obj1==obj2” compares two objects to identify they are the same object.
“obj1.eqeal(obj2 )” compares two objects’ value to identify they have the same value.
For instance:
Sting s1=new String(“ok”);
Sting s2=new String(“ok”);
if (s1.equals(s2)){ // using equals( )
System.out.print(“equal”);
}
The above code will output “equal”.
//***************************************
That was a typical example of how Mr.Yao expresses himself:
- sloppiness in typing (e.g., 'Sting' instead of 'String', and 'eqeal' instead of 'equals')
- clumsy and, what's even worse, misleading attempt at explanation (please read official Oracle documentation on '==' and equals() to see my point)
- and I just can't comprehend why on Earth the author numbers his possible answers first and then refers to them by letters...
Page 118, Q9
//***************************************
Which following line is not correct?
StringBuffer str1; str3; // line1
String str2 =new StringBuffer( ); // line2
str3=str1.concat(str2); // line3
System.out.println(str3); // line4
1. line1
2. line2
3. line3
4. line4
Answer: C
Explanation:
str3=str1.concat(str2) is wrong.
concat( ) is used to String object instead of StringBuffer object.
append( ) can be used to StringBuffer object.
//***************************************
Line 1 won't compile because it contains an extra semicolon in place of a comma (granted, we can live with typos but this is getting really annoying).
Line 2 won't compile either because it attempts to assign StringBuffer to String, of all things.
Line 3 throws compiler error, too... TWICE! Because, apart from the misused concat() method, str1 hasn't been initialized, that's why.
In short, unless you're honing your skills as an aspiring copyeditor, stay away from this 'book'; warn your friends, too.
0 of 0 people found the following review helpful.
Kindle version has issues
By kirtu
This may be a valuable text but the first question in the Kindle version is *wrong*! This might be a Kindle format generation problem but if the question showed up on a test then the correct answer would be "none of the above answers". The problem is that the proper class intended in the first question is System - not system. Capitalization is significant in Java. so the Kindle version may have issues. Therefore I can only give it three stars (for now).
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