When both types are compatible and the destination type has the same size as the source type.When both types are compatible and the destination type is larger than the source type.When both types are compatible and the destination type is smaller than the source type.In all the above cases.

10.Which form of inheritance is supported by the use of interfaces?

Multiple inheritanceMultilevel inheritanceHierarchical inheritanceNone of the above

11.What does a package typically consist of?

Classes and interfacesOnly classesTools for editingEditing tools along with interfaces

12.Which JDBC method is utilized to execute DML operations?

executeUpdate()executeQuery()execute()None of the above

13.The function pow() belongs to which class?

InputStream classObject superclassMath utility classNeither of the above

14.Which technology enables Java code running on the JVM to interact with native applications by both invoking and being invoked by them?

JNIFJINJIJFI

15.Considering the classes below, which description best represents the data fields present in an instance of class B? class A { private int i; protected int j; } class B extends A { private int k; protected int m; }

An instance of B holds the fields j, k, and m.An instance of B contains only the fields k and m.An instance of B includes the fields j and m.An instance of B has the fields i, j, k, and m.An instance of B contains no inherited fields.

How to prepare with Java concepts and its programming MCQs

Work through questions topic by topic, then revisit any you answered incorrectly.
Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
Pair subject practice with past papers to see how Java concepts and its programming appears in real exam conditions.

Java concepts and its programming

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Practice questions

1.What is the reason for using an array as a parameter in the main method?

2.What do you call methods that share the same name but differ in their parameter lists and implementations?

3.What is the total number of keywords defined in the Java programming language?

4.What is the total number of primitive data types available in Java?

5.What is the name of the program that runs an applet?

6.What is the output of the following Java program? public class Test { public static void main(String[] args) { byte b = 127; b++; b++; System.out.println(b); } }

7.What are the sizes, in bits, of the float and double data types in Java?

8.Which package contains all the collection classes in Java?

9.When does automatic type conversion occur in Java?

10.Which form of inheritance is supported by the use of interfaces?

11.What does a package typically consist of?

12.Which JDBC method is utilized to execute DML operations?

13.The function pow() belongs to which class?

14.Which technology enables Java code running on the JVM to interact with native applications by both invoking and being invoked by them?

15.Considering the classes below, which description best represents the data fields present in an instance of class B? class A { private int i; protected int j; } class B extends A { private int k; protected int m; }

16.What will be the output of the following code snippet? double STATIC = 2.5; System.out.println(STATIC);

17.In what format should all raw data types be read and stored in the database?

18.What type of predefined entity is a String in programming?

19.Which file type represents an executable applet?

20.Which of the following is not included in Java's Collection Framework?

How to prepare with Java concepts and its programming MCQs

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