MCQOPTIONS
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MCQOPTIONS
This section includes 56 Mcqs, each offering curated multiple-choice questions to sharpen your Java Programming knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Java does not allow nesting of methods. (TRUE / FALSE) |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 2. |
What is the output of the below Java program with a final local variable? |
| A. | 30 |
| B. | 20 |
| C. | 10 |
| D. | Compiler error |
| Answer» E. | |
| 3. |
What is the output of the Java program with static variables? |
| A. | t6 BIRDS before=25 |
| B. | t6 BIRDS before=25 |
| C. | t6 BIRDS before=25 |
| D. | None |
| Answer» C. t6 BIRDS before=25 | |
| 4. |
A static-method or a static-variable is shared among all instances of a class. (TRUE / FALSE) |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 5. |
In Java, local variables are stored in __ memory and instance variables are stored in ___ memory. |
| A. | Stack, Stack |
| B. | Heap, Heap |
| C. | Stack, Heap |
| D. | Heap, Stack |
| Answer» D. Heap, Stack | |
| 6. |
A local variable declared inside a method can not be used in expressions without initializing it first. (TRUE / FALSE). |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 7. |
What is the output of the below Java program with a "this" operator? |
| A. | CAKES=5 |
| B. | CAKES=0 |
| C. | CAKES=10 |
| D. | Compiler error |
| Answer» D. Compiler error | |
| 8. |
A "this" operator used inside a Java method refers to ___ variable. |
| A. | Global variable |
| B. | Method local variable |
| C. | Instance variable |
| D. | None |
| Answer» D. None | |
| 9. |
What is the output of the below Java program with a void method? |
| A. | SHOW Method 2 |
| B. | No output |
| C. | Compiler error |
| D. | None |
| Answer» B. No output | |
| 10. |
What is the output of the below Java program with an empty return statement? |
| A. | SHOW Method.. |
| B. | No output |
| C. | Compiler error |
| D. | None |
| Answer» B. No output | |
| 11. |
Choose the correct identifier for a method name in Java. |
| A. | 1show |
| B. | $hide |
| C. | *show$ |
| D. | 3_click |
| Answer» C. *show$ | |
| 12. |
In Java, a method name can contain numbers from 2nd character onwards. (TRUE / FALSE). |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 13. |
In Java, a method name can start with ___. |
| A. | Alphabet |
| B. | Underscore (_) |
| C. | Dollar ($) |
| D. | All the above |
| Answer» E. | |
| 14. |
In Java, a method name can not start with a ___. |
| A. | number |
| B. | # (pound) |
| C. | - (hyphen) |
| D. | All the above |
| Answer» E. | |
| 15. |
Java method signature is a combination of ___. |
| A. | Return type |
| B. | Method name |
| C. | Argument List |
| D. | All the above |
| Answer» E. | |
| 16. |
in Java, add a ___ to a constructor to convert it into a method. |
| A. | if statement |
| B. | static |
| C. | return type |
| D. | semicolon |
| Answer» D. semicolon | |
| 17. |
State TRUE or FALSE. A Java method can have the same name as the class name. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 18. |
All Java methods must have a return type. (TRUE / FALSE) |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 19. |
A Java method is comparable to a __ in c language. |
| A. | structure |
| B. | union |
| C. | function |
| D. | enum |
| Answer» D. enum | |
| 20. |
Which statement, inserted at line 10, creates an instance of Bar? |
| A. | Foo.Bar b = new Foo.Bar(); |
| B. | Foo.Bar b = f.new Bar(); |
| C. | Bar b = new f.Bar(); |
| D. | Bar b = f.new Bar(); |
| Answer» C. Bar b = new f.Bar(); | |
| 21. |
What is the output of this program, Command line execution is done as – “java Output command Line 10 A b 4 N”? |
| A. | java |
| B. | 10 |
| C. | 20 |
| D. | b |
| Answer» D. b | |
| 22. |
Which one create an anonymous inner class from within class Bar? |
| A. | Boo f = new Boo(24) { }; |
| B. | Boo f = new Bar() { }; |
| C. | Bar f = new Boo(String s) { }; |
| D. | Boo f = new Boo.Bar(String s) { }; |
| Answer» C. Bar f = new Boo(String s) { }; | |
| 23. |
Which statement, if placed in a class other than MyOuter or MyInner, instantiates an instance of the nested class? |
| A. | MyOuter.MyInner m = new MyOuter.MyInner(); |
| B. | MyOuter.MyInner mi = new MyInner(); |
| C. | MyOuter m = new MyOuter();MyOuter.MyInner mi = m.new MyOuter.MyInner(); |
| D. | MyInner mi = new MyOuter.MyInner(); |
| Answer» B. MyOuter.MyInner mi = new MyInner(); | |
| 24. |
After line 8 runs. how many objects are eligible for garbage collection? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 25. |
At what point is the Bar object, created on line 6, eligible for garbage collection? |
| A. | after line 12 |
| B. | after line 14 |
| C. | after line 7, when doBar() completes |
| D. | after line 15, when main() completes |
| Answer» C. after line 7, when doBar() completes | |
| 26. |
Where will be the most chance of the garbage collector being invoked? |
| A. | After line 9 |
| B. | After line 10 |
| C. | After line 11 |
| D. | Garbage collector never invoked in methodA() |
| Answer» E. | |
| 27. |
When is the B object, created in line 3, eligible for garbage collection? |
| A. | after line 5 |
| B. | after line 6 |
| C. | after line 7 |
| D. | There is no way to be absolutely certain. |
| Answer» E. | |
| 28. |
When is the Demo object eligible for garbage collection? |
| A. | After line 7 |
| B. | After line 8 |
| C. | After the start() method completes |
| D. | When the instance running this code is made eligible for garbage collection. |
| Answer» E. | |
| 29. |
After line 11 runs, how many objects are eligible for garbage collection? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 30. |
When is the Float object, created in line 3, eligible for garbage collection? |
| A. | just after line 5 |
| B. | just after line 6 |
| C. | just after line 7 |
| D. | just after line 8 |
| Answer» D. just after line 8 | |
| 31. |
In the below code, which call to sum() method is appropriate? |
| A. | only sum(10) |
| B. | only sum(10,20) |
| C. | only sum(10) & sum(10,20) |
| D. | all of the mentioned |
| Answer» E. | |
| 32. |
Which function is used to perform some action when the object is to be destroyed? |
| A. | finalize() |
| B. | delete() |
| C. | main() |
| D. | none of the mentioned |
| Answer» B. delete() | |
| 33. |
Garbage Collection can be controlled by a program? |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 34. |
What is not the use of “this” keyword in Java? |
| A. | Passing itself to another method |
| B. | Calling another constructor in constructor chaining |
| C. | Referring to the instance variable when local variable has the same name |
| D. | Passing itself to method of the same class |
| Answer» E. | |
| 35. |
What would be the output of the following snippet, if compiled and executed with command line “hello there”? |
| A. | Compile time error |
| B. | Output would be “hello” |
| C. | Output would be “there” |
| D. | Output would be “hello there” |
| Answer» B. Output would be “hello” | |
| 36. |
What is the output of the following snippet running with “java demo I write java code”? |
| A. | The snippet compiles, runs and prints “java demo” |
| B. | The snippet compiles, runs and prints “java code” |
| C. | The snippet compiles, runs and prints “demo code” |
| D. | The snippet compiles, runs and prints “I code” |
| Answer» E. | |
| 37. |
What is the output of below snippet run as $ java Demo –length 512 –breadth 2 -h 3 ? |
| A. | 2 512 3 |
| B. | 2 2 3 |
| C. | 512 2 3 |
| D. | 512 512 3 |
| Answer» D. 512 512 3 | |
| 38. |
What would be the output of following snippet, if compiled and executed with command line argument “java abc 1 2 3”? |
| A. | 1 2 |
| B. | 2 3 |
| C. | 1 2 3 |
| D. | Compilation error |
| Answer» C. 1 2 3 | |
| 39. |
Can a class be declared with a protected modifier. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 40. |
What would be behaviour if the constructor has a return type? |
| A. | Compilation error |
| B. | Runtime error |
| C. | Compilation and runs successfully |
| D. | Only String return type is allowed |
| Answer» B. Runtime error | |
| 41. |
What would be the output of the following snippet, if attempted to compile and run this code with command line argument “java abc Rakesh Sharma”? |
| A. | Compile time error |
| B. | Compilation but runtime error |
| C. | Compilation and output Rakesh :-Please pay Rs.2000 |
| D. | Compilation and output Sharma :-Please pay Rs.2000 |
| Answer» B. Compilation but runtime error | |
| 42. |
Which of these is a correct statement about args in this line of code?public static void main(String args[]) |
| A. | args is a String |
| B. | args is a Character |
| C. | args is an array of String |
| D. | args in an array of Character |
| Answer» D. args in an array of Character | |
| 43. |
What is the output of this program, Command line execution is done as – “java Output This is a command Line”? |
| A. | java |
| B. | Output |
| C. | This |
| D. | is |
| Answer» D. is | |
| 44. |
What is the output of this program, Command line exceution is done as – “java Output This is a command Line”? |
| A. | java |
| B. | is |
| C. | This |
| D. | command |
| Answer» E. | |
| 45. |
What would be the output of following snippet, if attempted to compile and execute? |
| A. | The snippet compiles, runs and prints 0 |
| B. | The snippet compiles, runs and prints 1 |
| C. | The snippet does not compile |
| D. | The snippet compiles and runs but does not print anything |
| Answer» E. | |
| 46. |
All the variables of interface should be? |
| A. | default and final |
| B. | default and static |
| C. | public, static and final |
| D. | protect, static and final |
| Answer» D. protect, static and final | |
| 47. |
All the variables of class should be ideally declared as? |
| A. | private |
| B. | public |
| C. | protected |
| D. | default |
| Answer» B. public | |
| 48. |
Which of the following statements are incorrect? |
| A. | default constructor is called at the time of object declaration |
| B. | Constructor can be parameterized |
| C. | finalize() method is called when a object goes out of scope and is no longer needed |
| D. | finalize() method must be declared protected |
| Answer» D. finalize() method must be declared protected | |
| 49. |
What is true about constructor? |
| A. | It can contain return type |
| B. | It can take any number of parameters |
| C. | It can have any non access modifiers |
| D. | Constructor cannot throw an exception |
| Answer» C. It can have any non access modifiers | |
| 50. |
What is the syntax of abstract class in java? |
| A. | abstract A{} |
| B. | abstract class A |
| C. | abstract class A{} |
| D. | abstract class A[] |
| Answer» D. abstract class A[] | |