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Oracle Java Technology 1Z0-851 Exam Topics
Section 4: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
Section 5: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
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Oracle Java Standard Edition 6 Programmer Certified Professional Exam OCJP 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
Questions and Answers : 290Q&As
Update Time : 2012-1-10
Price : $79.00
Free 1Z0-851 Demo Download
1.Given a pre-generics implementation of a method:
11.public static int sum(Listlist) {
12.int sum=0;
13.for(Iterator iter =list.iterator(); iter.has Next(); ){
14.int i =((Integer)iter.next()).int Value();
15.sum+=i;
16.}
17.return sum;
18.}
What three changes allow the class to be used with generics and avoid an uncheckedw arning?(Choose three.)
A.Remove line 14.
B.Replace line 14 with”int i =iter.next();”.
C.Replace line 13 with”for(int i :intList) {”.
D.Replace line 13 with”for(Iterator iter :intList) {”.
E.Replace the method declaration with “sum(List<int>intList)”.
F.Replace the method declaration with “sum(List<Integer>intList)”.
Answer:A,C,F
2.A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0,object),but does NOT need to support quick random access.What supports these requirements.?
A.java.util.Queue
B.java.util.ArrayList
C.java.util.LinearList
D.java.util.LinkedList
Answer:D
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Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
Questions and Answers : 290Q&As
Update Time : 2012-1-10
Price : $79.00
Oracle OCJP 1Z0-851 Exam Topics
Section 5: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
Section 6: Collections / Generics
Given a design scenario, determine which collection classes and/or interfaces should be used to properly implement that design, including the use of the Comparable interface.
Distinguish between correct and incorrect overrides of corresponding hashCode and equals methods, and explain the difference between == and the equals method.
Write code that uses the generic versions of the Collections API, in particular, the Set, List, and Map interfaces and implementation classes. Recognize the limitations of the non-generic Collections API and how to refactor code to use the generic versions. Write code that uses the NavigableSet and NavigableMap interfaces.
Develop code that makes proper use of type parameters in class/interface declarations, instance variables, method arguments, and return types; and write generic methods or methods that make use of wildcard types and understand the similarities and differences between these two approaches.
Use capabilities in the java.util package to write code to manipulate a list by sorting, performing a binary search, or converting the list to an array. Use capabilities in the java.util package to write code to manipulate an array by sorting, performing a binary search, or converting the array to a list. Use the java.util.Comparator and java.lang.Comparable interfaces to affect the sorting of lists and arrays. Furthermore, recognize the effect of the “natural ordering” of primitive wrapper classes and java.lang.String on sorting.
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11.Given:
11.classAlpha{
12.publicvoidfoo() {System.out.print(”Afoo”);}
13.}
14.publicclassBetaextendsAlpha{
15.publicvoidfoo() {System.out.print(”Bfoo”);}
16.publicstaticvoidmain(String[]args){
17.Alphaa=newBeta();
18.Betab=(Beta)a;
19.a.foo();
20.b.foo();
21.}
22.
}
Whatis the result?
A.AfooAfoo
B.AfooBfoo
C.BfooAfoo
D.BfooBfoo
E.Compilationfails.
F.Anexceptionis thrownatruntime.
Answer:D
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1.Givenapre-genericsimplementation ofamethod:
11.publicstaticint sum(Listlist) {
12.int sum=0;
13.for(Iterator iter =list.iterator(); iter.hasNext(); ){
14.int i =((Integer)iter.next()).intValue();
15.sum+=i;
16.}
17.returnsum;
18.}
Whatthree changesallowtheclassto beusedwithgenericsandavoidanuncheckedwarning?(Choose
three.)
A.Removeline 14.
B.Replaceline 14with”inti =iter.next();”.
C.Replaceline 13with”for(inti :intList) {”.
D.Replaceline 13with”for(Iteratoriter :intList) {”.
E.Replacethe methoddeclarationwith”sum(List<int>intList)”.
F.Replacethe methoddeclarationwith”sum(List<Integer>intList)”.
Answer:A,C,F
2.Aprogrammerhasanalgorithmthat requiresajava.util.List that providesanefficient
implementation ofadd(0,object),butdoesNOTneedtosupportquickrandomaccess.Whatsupports
these requirements.?
A.java.util.Queue
B.java.util.ArrayList
C.java.util.LinearList
D.java.util.LinkedList
Answer:D
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Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
Questions and Answers : 290Q&As
Update Time : 2011-12-23
Price : $79.00
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Section 4: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
Section 5: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
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Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
One year free update
Once failed,100% refund
Questions and Answers : 290Q&As
Update Time : 2011-12-17
Price : $79.00
Section 3: API Contents
Develop code that uses the primitive wrapper classes (such as Boolean, Character, Double, Integer, etc.), and/or autoboxing & unboxing. Discuss the differences between the String, StringBuilder, and StringBuffer classes.
Given a scenario involving navigating file systems, reading from files, writing to files, or interacting with the user, develop the correct solution using the following classes (sometimes in combination), from java.io: BufferedReader, BufferedWriter, File, FileReader, FileWriter, PrintWriter, and Console.
Use standard J2SE APIs in the java.text package to correctly format or parse dates, numbers, and currency values for a specific locale; and, given a scenario, determine the appropriate methods to use if you want to use the default locale or a specific locale. Describe the purpose and use of the java.util.Locale class.
Write code that uses standard J2SE APIs in the java.util and java.util.regex packages to format or parse strings or streams. For strings, write code that uses the Pattern and Matcher classes and the String.split method. Recognize and use regular expression patterns for matching (limited to: . (dot), * (star), + (plus), ?, \d, \s, \w, [], ()). The use of *, +, and ? will be limited to greedy quantifiers, and the parenthesis operator will only be used as a grouping mechanism, not for capturing content during matching. For streams, write code using the Formatter and Scanner classes and the PrintWriter.format/printf methods. Recognize and use formatting parameters (limited to: %b, %c, %d, %f, %s) in format strings.
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Section 4: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
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1Z0-851 Exam Topics : OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
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Java Standard Edition 6 1Z0-851 Exam Fundamentals
Given a code example and a scenario, write code that uses the appropriate access modifiers, package declarations, and import statements to interact with (through access or inheritance) the code in the example.
Given an example of a class and a command-line, determine the expected runtime behavior.
Determine the effect upon object references and primitive values when they are passed into methods that perform assignments or other modifying operations on the parameters.
Given a code example, recognize the point at which an object becomes eligible for garbage collection, determine what is and is not guaranteed by the garbage collection system, and recognize the behaviors of the Object.finalize() method.
Given the fully-qualified name of a class that is deployed inside and/or outside a JAR file, construct the appropriate directory structure for that class. Given a code example and a classpath, determine whether the classpath will allow the code to compile successfully.
Write code that correctly applies the appropriate operators including assignment operators (limited to: =, +=, -=), arithmetic operators (limited to: +, -, *, /, %, ++, –), relational operators (limited to: <, <=, >, >=, ==, !=), the instanceof operator, logical operators (limited to: &, |, ^, !, &&, ||), and the conditional operator ( ? : ), to produce a desired result. Write code that determines the equality of two objects or two primitives.
You will also learn how to create an operationaldatabase and properly manage the various structures in an effective and efficient manner including performance monitoring, database security, user management,and backup/recovery techniques. The lesson topics are reinforced with structuredhands-on practices. This course is designed to prepare you for the corresponding Oracle 1Z0-851 exam Certified Associate exam.
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Java Standard Edition 6 Programmer Certified Professional Exam
Exam Number: 1Z0-851
Associated Certifications: Oracle Certified Professional, Java SE 6 Programmer
Exam Price: US$ 300
Duration: 150 minutes
Number of Questions: 60
Passing Score: 61%
You will also learn how to create an operationaldatabase and properly manage the various structures in an effective and efficient manner including performance monitoring, database security, user management,and backup/recovery techniques. The lesson topics are reinforced with structuredhands-on practices. This course is designed to prepare you for the corresponding Oracle 1Z0-851 exam Certified Associate exam.
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Oracle 1Z0-851 Exam Topics
Section 4: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
Section 5: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
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Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851 Topics
Section 1: Declarations, Initialization and Scoping
Develop code that declares classes (including abstract and all forms of nested classes), interfaces, and enums, and includes the appropriate use of package and import statements (including static imports).
Develop code that declares an interface. Develop code that implements or extends one or more interfaces. Develop code that declares an abstract class. Develop code that extends an abstract class.
Develop code that declares, initializes, and uses primitives, arrays, enums, and objects as static, instance, and local variables. Also, use legal identifiers for variable names.
Given a code example, determine if a method is correctly overriding or overloading another method, and identify legal return values (including covariant returns), for the method.
Given a set of classes and superclasses, develop constructors for one or more of the classes. Given a class declaration, determine if a default constructor will be created, and if so, determine the behavior of that constructor. Given a nested or non-nested class listing, write code to instantiate the class.
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Section 4: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
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Java Standard Edition 6 Programmer Certified Professional Exam
Exam Number: 1Z0-851
Associated Certifications: Oracle Certified Professional, Java SE 6 Programmer
Exam Price: £ 202
Duration: 150 minutes
Number of Questions: 60
Passing Score: 61%
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Exam Number: 1Z0-851
Associated Certifications: Oracle Certified Professional, Java SE 6 Programmer
Exam Price: £ 202
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Duration: 150 minutes
Number of Questions: 60
Passing Score: 61%
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Oracle OCJP 1Z0-851 Exam Topics: Fundamentals
Given a code example and a scenario, write code that uses the appropriate access modifiers, package declarations, and import statements to interact with (through access or inheritance) the code in the example.
Given an example of a class and a command-line, determine the expected runtime behavior.
Determine the effect upon object references and primitive values when they are passed into methods that perform assignments or other modifying operations on the parameters.
Given a code example, recognize the point at which an object becomes eligible for garbage collection, determine what is and is not guaranteed by the garbage collection system, and recognize the behaviors of the Object.finalize() method.
Given the fully-qualified name of a class that is deployed inside and/or outside a JAR file, construct the appropriate directory structure for that class. Given a code example and a classpath, determine whether the classpath will allow the code to compile successfully.
Write code that correctly applies the appropriate operators including assignment operators (limited to: =, +=, -=), arithmetic operators (limited to: +, -, *, /, %, ++, –), relational operators (limited to: <, <=, >, >=, ==, !=), the instanceof operator, logical operators (limited to: &, |, ^, !, &&, ||), and the conditional operator ( ? : ), to produce a desired result. Write code that determines the equality of two objects or two primitives.
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Java Standard Edition 6 Programmer Certified Professional Exam
Exam Number: 1Z0-851
Associated Certifications: Oracle Certified Professional, Java SE 6 Programmer
Exam Price: £ 202
Duration: 150 minutes
Number of Questions: 60
Passing Score: 61%
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Oracle 1Z0-851 Exam Topics: Section 1: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
Oracle Java Technology 1Z0-851 Exam Topics: Section 2: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
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Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
One year free update
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Questions and Answers : 290Q&As
Update Time : 2011-10-18
Price : $79.00
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The 1Z0-851 preparation guide is subject to change at any time without prior notice and at the sole discretion of Oracle. Oracle exams might include adaptive testing technology and simulation items. Oracle does not identify the format in which exams are presented.
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1Z0-851 Exam
Java Standard Edition 6 Programmer Certified Professional Exam
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
Questions and Answers : 280 Q&As
Update Time: 2011-10-18
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