Question 1

If a thread is to be declared as a daemon thread, it must be declared before

Accepted Answer

A) start method 
B) run method 
C) stop method 
D) None of above 
A) start method 
B) run method 
C) stop method 
D) None of above A

Question 2

What are the pillars of OOPS concept?

Accepted Answer

A) Abstraction, Inheritance, Encapsulation, Polymorphism 
B) Atomicity, Inheritance, Encapsulation, Polymorphism 
C) Abstraction, Inheritance, Polymorphism 
D) None of the Above 
A) Abstraction, Inheritance, Encapsulation, Polymorphism 
B) Atomicity, Inheritance, Encapsulation, Polymorphism 
C) Abstraction, Inheritance, Polymorphism 
D) None of the Above A

Question 3

Which class cannot be a subclass in java

Accepted Answer

A) Abstract class 
B) Parent class 
C) Final class 
D) None of above 
A) Abstract class 
B) Parent class 
C) Final class 
D) None of above C

Question 4

Which of the following statements is correct?

Accepted Answer

A) Public method is accessible to all other classes in the hierarchy 
B) Public method is accessible only to subclasses of its parent class 
C) Public method can only be called by object of its class. 
D) Public method can be accessed by calling object of the public class. 
A) Public method is accessible to all other classes in the hierarchy 
B) Public method is accessible only to subclasses of its parent class 
C) Public method can only be called by object of its class. 
D) Public method can be accessed by calling object of the public class.

Question 5

What is the stored in the object obj in following lines of code?
Box obj;

Accepted Answer

A) Memory address of allocated memory of object. 
B) NULL 
C) Any arbitrary pointer 
D) Garbage 
A) Memory address of allocated memory of object. 
B) NULL 
C) Any arbitrary pointer 
D) Garbage

Question 6

JAR stands for?

Accepted Answer

A) Java Archive 
B) Java Archive Runner 
C) Java Application Runner 
D) None of the above 
A) Java Archive 
B) Java Archive Runner 
C) Java Application Runner 
D) None of the above

Question 7

Which of the following is a valid declaration of an object of class Box?

Accepted Answer

A) Box obj = new Box(); 
B) Box obj = new Box; 
C) obj = new Box(); 
D) new Box obj; 
A) Box obj = new Box(); 
B) Box obj = new Box; 
C) obj = new Box(); 
D) new Box obj;

Question 8

What is the default buffer size used by any buffered class?

Accepted Answer

A) 128 bytes 
B) 256 bytes 
C) 512 bytes 
D) 1024 bytes 
A) 128 bytes 
B) 256 bytes 
C) 512 bytes 
D) 1024 bytes

Question 9

Why we use array as a parameter of main method

Accepted Answer

A) It is syntax 
B) Can store multiple values 
C) Both of above 
D) None of above 
A) It is syntax 
B) Can store multiple values 
C) Both of above 
D) None of above

Question 10

Program which executes applet is known as

Accepted Answer

A) applet engine 
B) virtual machine 
C) JVM 
D) None of above 
A) applet engine 
B) virtual machine 
C) JVM 
D) None of above

Question 11

What is different between a Java applet and a Java application?

Accepted Answer

A) An application can in general be trusted whereas an applet can't. 
B) An applet must be executed in a browser environment. 
C) An applet is not able to access the files of the computer it runs on 
D) All of the above 
A) An application can in general be trusted whereas an applet can't. 
B) An applet must be executed in a browser environment. 
C) An applet is not able to access the files of the computer it runs on 
D) All of the above

Question 12

Which of these is correct about passing an argument by call-by-value process?

Accepted Answer

A) Copy of argument is made into the formal parameter of the subroutine. 
B) Reference to original argument is passed to formal parameter of the subroutine. 
C) Copy of argument is made into the formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument. 
D) Reference to original argument is passed to formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument. 
A) Copy of argument is made into the formal parameter of the subroutine. 
B) Reference to original argument is passed to formal parameter of the subroutine. 
C) Copy of argument is made into the formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument. 
D) Reference to original argument is passed to formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument.

Question 13

Which of this statement is incorrect?

Accepted Answer

A) Every class must contain a main() method. 
B) Applets do not require a main() method at all. 
C) There can be only one main() method in a program. 
D) main() method must be made public. 
A) Every class must contain a main() method. 
B) Applets do not require a main() method at all. 
C) There can be only one main() method in a program. 
D) main() method must be made public.

Question 14

What is process of defining two or more methods within same class that have same name but different parameters declaration?

Accepted Answer

A) Method overloading 
B) Method overriding 
C) Method hiding 
D) None of the mentioned 
A) Method overloading 
B) Method overriding 
C) Method hiding 
D) None of the mentioned

Question 15

You read the following statement in a Java program that compiles and executes. submarine.dive(depth); What can you say for sure?

Accepted Answer

A) Depth must be an int 
B) Dive must be a method. 
C) Dive must be the name of an instance fie 
A) Depth must be an int 
B) Dive must be a method. 
C) Dive must be the name of an instance fie

Question 16

What is byte code in the context of Java?

Accepted Answer

A) The type of code generated by a Java compiler 
B) The type of code generated by a Java Virtual Machine 
C) It is another name for a Java source file 
D) It is the code written within the instance methods of a class. 
A) The type of code generated by a Java compiler 
B) The type of code generated by a Java Virtual Machine 
C) It is another name for a Java source file 
D) It is the code written within the instance methods of a class.

Question 17

What is the process of defining a method in terms of itself that is a method that calls itself?

Accepted Answer

A) Polymorphism 
B) Abstraction 
C) Encapsulation 
D) Recursion 
A) Polymorphism 
B) Abstraction 
C) Encapsulation 
D) Recursion

Question 18

What is garbage collection in the context of Java?

Accepted Answer

A) The operating system periodically deletes all of the java files available on the system. 
B) Any package imported in a program and not used is automatically deleted. 
C) When all references to an object are gone, the memory used by the object is automatically reclaim 
A) The operating system periodically deletes all of the java files available on the system. 
B) Any package imported in a program and not used is automatically deleted. 
C) When all references to an object are gone, the memory used by the object is automatically reclaim

Question 19

Which is true about an anonymous inner class?

Accepted Answer

A) It can extend exactly one class and implement exactly one interface. 
B) It can extend exactly one class and can implement multiple interfaces. 
C) It can implement multiple interfaces regardless of whether it also extends a class. 
D) None of above 
A) It can extend exactly one class and implement exactly one interface. 
B) It can extend exactly one class and can implement multiple interfaces. 
C) It can implement multiple interfaces regardless of whether it also extends a class. 
D) None of above

Question 20

Which of the following statements are incorrect?

Accepted Answer

A) Default constructor is called at the time of declaration of the object if a constructor has not been defined. 
B) Constructor can be parameterized. 
C) Finalize() method is called when a object goes out of scope and is no longer need 
A) Default constructor is called at the time of declaration of the object if a constructor has not been defined. 
B) Constructor can be parameterized. 
C) Finalize() method is called when a object goes out of scope and is no longer need

If a thread is to be declared as a daemon thread, it must be declared before

What are the pillars of OOPS concept?

Which class cannot be a subclass in java

Which of the following statements is correct?

What is the stored in the object obj in following lines of code? Box obj;

JAR stands for?

Which of the following is a valid declaration of an object of class Box?

What is the default buffer size used by any buffered class?

Why we use array as a parameter of main method

Program which executes applet is known as

What is different between a Java applet and a Java application?

Which of these is correct about passing an argument by call-by-value process?

Which of this statement is incorrect?

What is process of defining two or more methods within same class that have same name but different parameters declaration?

You read the following statement in a Java program that compiles and executes. submarine.dive(depth); What can you say for sure?

What is byte code in the context of Java?

What is the process of defining a method in terms of itself that is a method that calls itself?

What is garbage collection in the context of Java?

Which is true about an anonymous inner class?

Which of the following statements are incorrect?

Java Programming Language

Java Object-Oriented Programming

Java Programming: Data Types, Inheritance, Interfaces, Packages, and Exception Handling

Java Exception Handling and Inputoutput Operations

Java Inputoutput and Event Handling

AWT Components and Layout Management in Java

Java Thread Class, Exception Handling, and Garbage Collection

Java Multithreading and Exception Handling

Java Programming Language: Inheritance, Interfaces, Packages, and Methods

Java Programming : JDBC API, Layout Managers, and Event Handling

Java RMI and Swing Framework

Java Programming: GUI, RMI, Polymorphism, and String Handling

Java Programming:methods, Data Types, Operators, and Classes

Java Programming : Event Handling, Exception Handling

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Exam 7: Java Programming Concepts

If a thread is to be declared as a daemon thread, it must be declared before

What are the pillars of OOPS concept?

Which class cannot be a subclass in java

Which of the following statements is correct?

What is the stored in the object obj in following lines of code? Box obj;

JAR stands for?

Which of the following is a valid declaration of an object of class Box?

What is the default buffer size used by any buffered class?

Why we use array as a parameter of main method

Program which executes applet is known as

What is different between a Java applet and a Java application?

Which of these is correct about passing an argument by call-by-value process?

Which of this statement is incorrect?

What is process of defining two or more methods within same class that have same name but different parameters declaration?

You read the following statement in a Java program that compiles and executes. submarine.dive(depth); What can you say for sure?

What is byte code in the context of Java?

What is the process of defining a method in terms of itself that is a method that calls itself?

What is garbage collection in the context of Java?

Which is true about an anonymous inner class?

Which of the following statements are incorrect?

Java Programming Language

Java Object-Oriented Programming

Java Programming: Data Types, Inheritance, Interfaces, Packages, and Exception Handling

Java Exception Handling and Inputoutput Operations

Java Inputoutput and Event Handling

AWT Components and Layout Management in Java

Java Thread Class, Exception Handling, and Garbage Collection

Java Multithreading and Exception Handling

Java Programming Language: Inheritance, Interfaces, Packages, and Methods

Java Programming : JDBC API, Layout Managers, and Event Handling

Java RMI and Swing Framework

Java Programming: GUI, RMI, Polymorphism, and String Handling

Java Programming:methods, Data Types, Operators, and Classes

Java Programming : Event Handling, Exception Handling

Filters