Home

Java Programming 1000+ MCQ with answer for IBPS PO

Thursday 9th of March 2023

Sharing is caring

Downlaod Java Programming MCQ PDF
1. Which of the following classes are available in the java.lang package?
A. Random
B. Stack
C. String Buffer
D. Vector
Answer : A
2. For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
A. True.
B. False.
C.
D.
Answer : B
3. Give file is a file object, which of the following are legal statements to create a new file.
A. file.create();
B. FileOutputStream fos=new FileOutputStream(file);
C. FileInputStream fis=new FileInputStream(file);
D. all of the above
Answer : B
4. The check box group class is a subclass of the component class.
A. True
B. False
C.
D.
Answer : B
5. Consider the following class definition.
Class Student extends String
{
}
What happens when we try to compile this class?
A. Will not compile because class body is not defined
B. Will not compile because class is not declared public
C. Will compile successfully.
D. Will not compile because String is abstract
Answer : D
6. Which of the following methods can be used to remove a component from the display?
A. remove()
B. desappear()
C. hide()
D. move()
Answer : C
7. Frames and applets cannot be used together in the same program.
A. True
B. False
C.
D.
Answer : B
8. An EJB is a server-side component that encapsulates the business logic of an application
A. True
B. False
C.
D.
Answer : A
9. Which of the following are the wrapper classes?
A. Random
B. Vector
C. Byte
D. all of the above
Answer : C
10. putValue(...) method takes _____________________-
A. Two arguments of object type
B. First one is of a character type and second one is of an object type
C. First one is of an object type and second one is of a character type
D. None of the above.
Answer : A
11. If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
A. True
B. False
C.
D.
Answer : A
12. If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
A. True
B. False
C.
D.
Answer : A
13. The break statement is required in the default case of a switch selection structure.
A. True
B. False
C.
D.
Answer : B
14. Which of the following are keywords?
A. integer
B. default
C. Boolean
D. Object
Answer : B
15. It is an error if a class with one or more abstract methods is not explicitly declared abstract.
A. True
B. False
C.
D.
Answer : A
16. EJBs can be of the following type(s)
None of the above
A. Entity Bean
B. Session Bean
C. Message-driven bean
D. All of the above
Answer : D
17. Consider the following code snippet: 
try 
{
int x=0; int y=50/x; 
System.out.println("Division by zero"); 
}
catch(ArithmeticException e) 
{
System.out.println("catch block");
}

What will be the output?
A. Error. Won't compile
B. Division by zero
C. Catch block
D. Division by zero catch block
Answer : C
18. What is wrong in the following class definitions? 
abstract class print { 
abstract show();
} 
class Display extends print {
}
A. Nothing is wrong
B. Wrong Method show() should have a return type
C. Wrong Methods show() is not implemented in Display
D. Wrong Display does not contain any members.
Answer : C
19. When present, package must be the first no comment statement in the file.
A. True
B. False
C.
D.
Answer : A
20. If m and n are int type variables, what will be the result of the expression
'm % n' when m = -14 and n = -3?
A. 4
B. 2
C. -2
D. -4
Answer : C
21. Session bean
A. Represents a single client inside the application server
B. Can not be shared
C. Is not persistent
D. Satisfies all of the above conditions
Answer : D
22. Which javadoc tag is used to denote a comment for methods parameters?
A. @method
B. @parameter
C. @argument
D. @param
Answer : D
23. Consider the following statements: 
int x = 10, y = 15; 
x = ((x < y) ? (y + x) : (y - x);

What will be the value of x after executing these statements?
A. 25
B. 15
C. 5
D. Error can't be executed.
Answer : A
24. When we implement the Runnable interface, we must define the method
A. start()
B. init()
C. runnable()
D. run()
Answer : D
25. Consider the following class definitions:
 class maths { 
student student1; 
} 
class student { 
String name; 
}

This code represents:
A. an 'is a' relationship
B. a 'has a' relationship
C. both
D. neither
Answer : B
26. A class may be both abstract and final.
A. True
B. False
C.
D.
Answer : B
27. A variable declared inside the for loop control can not be referenced out side the loop.
A. True
B. False
C.
D.
Answer : A
28. In RMI before running the client program we must start RMI Registry.
A. True.
B. False.
C.
D.
Answer : A
29. The modulus operator (%) can be used only with Integer operands.
A. True
B. False
C.
D.
Answer : B
30. Which of the following will produce a value of 22 if x=22.9:
A. Ceil(x)
B. Round(x)
C. Rint(x)
D. Abs(x)
Answer : C
31. Connection, Statement are interfaces and ResultSet is a class.
A. True.
B. False.
C.
D.
Answer : B
32. In order to connect to a database through java program we must create _______-
A. Connection, Statement, ResultSet
B. Connection, ResultSet
C. Statement< ResultSet
D. Connection, Statement
Answer : D
33. In RMI we invoke client method from remote server
A. True
B. False
C.
D.
Answer : B
34. Which of the following statements are true?
A. UTF characters are all 24 bits.
B. Reader class has methods that can read integers and floats.
C. Unicode characters are all 16 bits.
D. all of the above
Answer : C
35. All methods in an abstract class must be declared abstract.
A. True
B. False
C.
D.
Answer : B
36. Two methods cannot have the same name in Java.
A. True
B. False
C.
D.
Answer : B
37. Which of the following methods can be used to draw the outline of a square?
A. fillRect()
B. drawLine()
C. drawString()
D. all of the above
Answer : B
38. Every method of a final in class is implicitly final.
A. True
B. False
C.
D.
Answer : A
39. Declarations can appear anywhere in the body of a Java method.
A. True
B. False
C.
D.
Answer : A
40. We can over load methods with differences only in their return type.
A. True
B. False
C.
D.
Answer : B
41. Which of the following statements are valid array declarations?
A. int number();
B. float average[];
C. double[] marks;
D. counter int[];
Answer : B
42. When X is a positive number the operations x>> 2 and x>>>2 both produce the same result.
A. True
B. False
C.
D.
Answer : A
43. When we implement an interface method, it should be declared as public.
A. True
B. False
C.
D.
Answer : A
44. Objects are passed to a method by use of call-by-reference.
A. True
B. False
C.
D.
Answer : A
45. Java always provides a default constructor to a class.
A. True
B. False
C.
D.
Answer : B
46. A package is a collection of
A. classes
B. interface
C. editing tools
D. classes and interfaces
Answer : D
47. A method declared as static can not access non-static class members.
A. True
B. False
C.
D.
Answer : A
48. Which exception is thrown by the read() method of InputStream class?
A. IOException
B. FileNotFoundException
C. ReadException
D. None of the above
Answer : A
49. Which of the following methods belong to the String class?
A. length()
B. compareTo()
C. substring()
D. all of the them
Answer : D
50. JSP files creates ________________
A. html files
B. html files and java files
C. java files and class files
D. None of the above.
Answer : C
Downlaod Java Programming MCQ PDF

Sharing is caring

Related Post