Java Programming Questionnaire

The application includes a set of questionnaires to evaluate your Java knowledge and a module that allows the student to write the reason why he/she chose an answer for any question.

Additionally, exercises on each topic are proposed for the student to develop and practice the Java language.

The documentation associated with each questionnaire, together with the questions of each one, can be used to study the topics of each question and learn new important aspects of the Java language.

Once you have finished answering the questionnaire, the system allows you to see if the answers you chose were correct.

The subject that the user will find and can review in the questionnaires is:

Operators and data types:
- Numerical systems: decimal, octal and hexa
- Molds (cast)
- Hierarchy of operators
- Storage of negative numbers
- Bitwise and arithmetic operators
- Read and write instructions

Logical and relationship operators

Boolean type variables

Decision instructions
- The instruction switch
- break,
- if else, nested
- if statement? :

Cycles
- for, while and do-while
- Operation of an accumulator within a cycle
- Calculation of the factorial.
- The Math.random() function
- Combinations C (n, r)
- The Fibonacci sequence
- Handling the nested for and while cycle

Arrangements
- Tours with indices
- Nested cycles
- Definition of arrangements.
- Initialize in your definition
- Initialize using cycles
- Element of an array used as an index for another array
- Conversion of a character to number
- Programs with two arrangements

Methods of the String class

Methods of the Arrays class

Methods of the Calendar class

Methods of the Integer class


Matrices
- Tour of matrices by rows and columns
- Synthetic division.

Classes and objects
- Definition of classes and objects
- The reference this
- Public, private and protected blocks
- Methods and attributes
- Builders overload
- Parameter by value and by reference
- Use of local variables
- Calling methods using objects
- Scope of the variables
- The public static void main () function
- Relations between classes:
Composition
Aggregation
Association

Classes in Java
- How to draw a figure using paint ()
- Creation of a framework (JFrame)
- The WindowAdapter object to close a frame
- Objects of type JTextField
- Listener for JButton, JRadioButton, JCheckBox
- The ActionListener interface
- Color capture of the frame surface
- Transfer of objects to methods
- Location of components using setLayout
- The JOptionPane class.

Heritage
- How an object is stored in an array
- The super () instructions and extends
- That is inherited in the derived class
- Call to the builders in the inheritance
- The protected modifier

Polymorphism and Interfaces
- Abstract classes and methods
- Signature and body of a method
- Creation of interfaces and abstract classes

Events
- The interfaces FocusListener, KeyListener, MouseListener
- The MouseEvent, KeyEvent,
- ComponentEvent classes
- Objects of type JCheckBox
- Adapters: MouseAdapter, KeyAdapter, ComponentAdapter

Threads
- The wait () / notify () protocol
- The Runnable interface
- The Calendar and Timer classes

Files
- The classes RandomAccess
- File,
- FileInputStream,
- FileOuputStream,
- BufferedReader,
- BufferedInputStream,
- BufferedWriter
- BufferedOutputStream

Collections in Java

MySql Databases

UML concepts

The replacement of Liskov