Read and download free pdf of CBSE Class 12 Informatics Practices Java Application Worksheet. Students and teachers of Class 12 Informatics Practices can get free printable Worksheets for Class 12 Informatics Practices Java Application in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 12 students should practice questions and answers given here for Informatics Practices in Class 12 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 12 Informatics Practices Worksheets prepared by teachers as per the latest Informatics Practices books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests
Worksheet for Class 12 Informatics Practices Java Application
Class 12 Informatics Practices students should refer to the following printable worksheet in Pdf for Java Application in Class 12. This test paper with questions and answers for Class 12 will be very useful for exams and help you to score good marks
Class 12 Informatics Practices Worksheet for Java Application
Easy
Question. Why does Java use Unicode ?
Question. What criteria would you suggest to choose the right loop for a specific job ?
Average
Question. What is wrong with the following code ?
Switch(x) {
Case 1 :
N1=10;
N2=20;
Case 2 :
N3=30;
Break ;
N4=40;
}
Hots
Question. Give the output of the following code : Int m=100;
While (m>0) {
If (m<10)
Break ;
M=m‐10;
}
System.out.println ( “m is “ +m);
Question. Why is Java often termed as a platform?
Answer: Platform is the environment in which programs execute. Instead of interacting with the Operating System directly, Java programs runs on a virtual machine provided by Java, therefore Java is often referred to as a platform also.
Question. What is a bytecode?
Answer: Bytecode is a set of pseudo mechanic language instructions that are understood by the JVM (Java Virtual Machine) and are independent of the underlying hardware.
Question. What do you understand by JVM?
Answer: JVM or Java Virtual Machine is an abstract machine designed to be implemented on top of existing processors. It hides the underlying OS from Java application. Programs written in Java are compiled into Java byte-code, which is then interpreted by a special java Interpreter for a specific platform. Actually this Java interpreter is known as Java Virtual Machine (JVM).
Question. What is JDK (Java Development Kit)?
Answer: The Java development kit comes with a collection of tools that are used for developing and running java programs.
Question. What are Java APIs?
Answer: The Java APIs (Application Program Interface) consist of libraries of pre-compiled code that programmers can use in their application.
Question. Write the five characteristics of Java/BlueJ?
Answer:
1. Write Once Run Anywhere
2. Light weight code
3. Security
4. Built in Graphics
5. Object Oriented Language
6. Support Multimedia
7. Platform Independent.
8. Open Product.
Question. What do you know about BlueJ? Answer: BlueJ is a Java development environment. It is an IDE (Integrated Development Environment), which includes an editor a debugger and a viewer. Question. How you create, compile and execute a program in Java or BlueJ? Explain your answer?
Answer: Create: Click on new class button from BlueJ editor, then type the class name a program icon will be created. double click on it, a program editor will be open, erase the code and type your program coding.
Compile: click the compile button on the left of the window or right click on the class icon and select compile from the menu options.
Execute: Right click on the class icon and select new class name option. A dialogue box appears type the name of the object. A object icon will be created at the bottom. Right click on the object icon and select the method we want to execute.
Question. The two types of Java programs/applications are?
Answer: The two types of Java Applications are ‘Internet Applets’ and ‘Stand alone application’.
Question. State the distinguishing features of Java and C++?
Answer: (i) Java does not support operator overloading.
(ii) Java does not use pointers.
(iii) There are no header files in Java.
(iv) Java does not have template classes as in C++.
Question. State the differences between Syntax errors and Logical errors.
Answer: The compiler can only translate a program if the program is syntactically correct; otherwise the compilation fails and you will not be able to run your program. Syntax refers to the structure of your program and the rules about that structure. The second type of error is a run-time error, so-called because the error does not appear until you run the program. In Java, run-time errors occur when the interpreter is running the byte code and something goes wrong.
Question. “Object is an instance of a class”, explain.
Answer: Object of a class contains data and functions provided in a class. it possesses all the features of a class. Hence object is termed as instance of a class.
Question. Name four basic features of JAVA.
Answer: Basic features of Java as follows:
i) It is an object oriented language.
ii) Java program is both compiled and interpreted..
iii) Java program can be application or applet.
iv) java is case sensitive language, i.e. it distinguished upper and lower case letters.
Question. Differentiate between Compiler and Interpreter.
Answer: Compiler convert source code to machine language whole at a time. Interpreter converts program from high level language to machine level language line by line or statement by statement.
Question. Java uses compiler as well as interpreter, explain.
Answer: Java compiler converts Java source code to byte code. This byte code is further converted into machine code to make it applicable for the specific platform by using interpreter.
Question. Differentiate between Source code and Byte code.
Answer: Source code is the program developed in Java Language, which is input to a computer through the keyboard.
Compiler converts source code to byte code for interpretation.
Question. Differentiate between Testing and Debugging.
Answer: Testing is the process of checking program logic manually to ensure whether it contains any error or not. Debugging is the process of removing errors from a program.
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Worksheet for CBSE Informatics Practices Class 12 Java Application
We hope students liked the above worksheet for Java Application designed as per the latest syllabus for Class 12 Informatics Practices released by CBSE. Students of Class 12 should download in Pdf format and practice the questions and solutions given in the above worksheet for Class 12 Informatics Practices on a daily basis. All the latest worksheets with answers have been developed for Informatics Practices by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their class tests and examinations. Expert teachers of studiestoday have referred to the NCERT book for Class 12 Informatics Practices to develop the Informatics Practices Class 12 worksheet. After solving the questions given in the worksheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 12 Informatics Practices designed by our teachers. We have also provided a lot of MCQ questions for Class 12 Informatics Practices in the worksheet so that you can solve questions relating to all topics given in each chapter.
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CBSE Class 12 Informatics Practices Java Application worksheets cover all topics as per the latest syllabus for current academic year.
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