Examen Java
Kandidaten voor dit examen zullen aantonen dat ze Java-code kunnen herkennen, schrijven en debuggen die een probleem logisch oplost.
Kandidaten voor dit examen zijn applicatieontwikkelaars die werken met Java 6 SE of later, middelbare en direct-post-secundaire studenten softwareontwikkeling, of beginnende softwareontwikkelaars.
Kandidaten moeten ten minste 150 uur instructie of hands-on ervaring met Java hebben,
bekend zijn met de functies en mogelijkheden ervan, en begrijpen hoe ze goed gevormde, goed gedocumenteerde Java-code moeten schrijven, debuggen en onderhouden.
To be successful on the test, the candidate is also expected to have the following prerequisite knowledge and skills:
- 8th grade reading skills
- Algebra II
- Basic computer operating system skills
- Command-line interface experience
1. Java Fundamentals
1.1 Describe the use of main in a Java application
- Signature of main, how to consume an instance of your own class, command-line arguments
1.2 Perform basic input and output using standard packages
- Print statements, import and use the Scanner class
1.3 Evaluate the scope of a variable
- Declare a variable within a block, class, or method
1.4 Comment and document programs
- Evaluate the syntax of Javadocs, write syntactically correct code comments
2. Data Types, Variables, and Expressions
2.1 Declare and use primitive data type variables
- Data types, including byte, char, int, double, short, long, float, Boolean; identify when precision is lost; initialization; how primitives differ from wrapper object types such as Integer and Boolean
2.2 Construct and evaluate code that manipulates strings
- String class and string literals, comparisons, concatenation, case, and length; String.format methods; string operators; the immutable nature of strings; initialization; null
2.3 Construct and evaluate code that creates, iterates, and manipulates arrays and array lists
- One- and two-dimensional arrays, including initialization, null, size, iterating elements, accessing elements; array lists, including adding and removing elements, traversing the list
2.4 Construct and evaluate code that performs parsing, casting, and conversion
- Cast between primitive data types, convert primitive types to equivalent object types, parse strings to numbers, convert primitive data types to strings
2.5 Construct and evaluate arithmetic expressions
- Arithmetic operators, assignment, compound assignment operators, operator precedence
3. Flow Control Implementation
3.1 Construct and evaluate code that uses branching statements
- if, else, else if, switch; single-line vs. block; nesting; logical and relational operators
3.2 Construct and evaluate code that uses loops
- while, for, for each, do while; break and continue; nesting; logical, relational, and unary operators
4. Object-Oriented Programming
4.1 Construct and evaluate class definitions
- Constructors, constructor overloading, one class per .java file, this keyword, basic inheritance and overriding
4.2 Declare, implement, and access data members in classes
- private, public, protected; instance data members; static data members; use static final to create constants; describe encapsulation
4.3 Declare, implement, and access methods
- private, public, protected; method parameters; return type; void; return value; instance methods; static methods; overloading
4.4 Instantiate and use class objects in programs
- Instantiation, initialization, null, access and modify data members, access methods, access and modify static members, import packages and classes
5. Code Compilation and Debugging
5.1 Troubleshoot syntax errors, logic errors, and runtime errors
- Print statements, javac command output, logic errors, console exceptions, stack trace evaluation
5.2 Implement exception handling
- try, catch, finally; Exception class; exception class types; display exception information
More about this certification path
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