Section 1: Declarations, Initialization and Scoping Develop code that declares classes including abstract and all types of nested classes , interfaces, enums, and includes the appropriate use of package and import statements including static imports. Develop code that declares an interface and that implements or extends one or more interfaces. Develop code that declares an abstract class. Develop code that extends an abstract class.
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Section 1: Declarations, Initialization and Scoping Develop code that declares classes including abstract and all types of nested classes , interfaces, enums, and includes the appropriate use of package and import statements including static imports.
Develop code that declares an interface and 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. Section 2: Flow Control Develop code that implements an if or switch statement; and identify legal argument types for these statements.
Develop code that implements all forms of loops and iterators, including the use of for, the enhanced for loop for-each , do, while, labels, break, and continue; and explain the values taken by loop counter variables during and after loop execution.
Develop code that makes use of assertions, and distinguish appropriate from inappropriate uses of assertions. Develop code that makes use of exceptions and exception handling clauses try, catch, finally , and declares methods and overriding methods that throw exceptions.
Recognize the effect of an exception arising at a specified point in a code fragment. Note that the exception may be a runtime exception, a checked exception, or an error.
Understand which of these are thrown by the virtual machine and recognize situations in which others should be thrown programatically. 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.
Describe the purpose and use of the java. Locale class. For strings, write code that uses the Pattern and Matcher classes and the String.
Recognize and use regular expression patterns for matching limited to:. For streams, write code using the Formatter and Scanner classes and the PrintWriter. Section 4: Concurrency Write code to define, instantiate, and start new threads using both java. Thread and java. 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. Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods. 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. Use capabilities in the java. Use the java. Comparator and java. Comparable interfaces to affect the sorting of lists and arrays.
Furthermore, recognize the effect of the "natural ordering" of primitive wrapper classes and java. String on sorting. Section 7: 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.
Given a code example and a classpath, determine whether the classpath will allow the code to compile successfully. Write code that determines the equality of two objects or two primitives.
SCWCD 1.6 DUMPS EBOOK
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