java Interview Questions| Java @ IDN Knowledge Xchange (KEP)

S.No	Question	Posted By	Date	Answers	Views
S.No	Question	Posted By	Date	Answers	Views
1	A single try block and multiple catch blocks can co-exist in a Java Program. Explain?	VAMSI	Jan 17, 2022 23:20	0	191
2	Briefly explain the concept of constructor overloading?	SANJAY	Jan 10, 2022 23:31	0	186
3	Can a class have an interface?	SANJAY	Jul 22, 2021 09:03	1	308
4	Can an exception be rethrown?	ROHAN	Aug 07, 2021 11:29	1	257
5	Can finally block be used without a catch?	ROHAN	Jul 05, 2021 14:12	1	298
6	Can I import same package or class twice? Will the JVM load the package twice at runtime?	RANJIT	Jul 02, 2021 13:34	1	298
7	Can I import same package/class twice? Will the JVM load the package twice at runtime?	RANJIT	Sep 07, 2021 00:56	0	192
8	Can the Interface be final?	ROHAN	Apr 30, 2021 10:20	1	338
9	Can there be an abstract method without an abstract class?	ROHAN	Apr 27, 2021 10:46	1	321
10	Can we change the scope of the overridden method in the subclass?	RANJIT	Mar 11, 2021 11:44	1	566
11	Can we declare a constructor as final?	RANJIT	Apr 08, 2021 12:56	2	340
12	Can we declare an interface as final?	JOSHUA	Apr 08, 2021 12:57	0	359
13	Can we declare the static variables and methods in an abstract class?	SANJAY	Feb 20, 2021 10:05	1	352
14	Can we define private and protected modifiers for the members in interfaces?	SANJAY	Aug 17, 2021 04:20	1	271
15	Can we execute a program without main() method?	RANJIT	Mar 08, 2021 12:39	1	335
16	Can we make constructors static?	JOSHUA	Feb 20, 2021 09:56	1	360
17	Can we make the abstract methods static in Java?	VAMSI	Feb 20, 2021 10:02	1	357
18	Can we modify the throws clause of the superclass method while overriding it in the subclass?	VAMSI	Mar 12, 2021 11:15	1	406
19	Can we overload the constructors?	SANJAY	Feb 15, 2021 10:59	1	349
20	Can we overload the main() method?	ROHAN	Mar 03, 2021 10:58	1	332
21	Can we override the overloaded method?	ROHAN	Mar 11, 2021 11:41	1	338
22	Can we override the private methods?	VAMSI	Mar 11, 2021 11:43	1	329
23	Can we override the static method?	RANJIT	Mar 06, 2021 10:16	1	323
24	Can we override the static methods?	RANJIT	Feb 19, 2021 11:05	1	337
25	Can you achieve Runtime Polymorphism by data members?	RANJIT	Apr 20, 2021 12:53	1	326
26	Can you declare an interface method static?	VAMSI	Apr 28, 2021 10:14	1	306
27	Can you declare the main method as final?	JOSHUA	Apr 06, 2021 12:49	1	348
28	Can you have virtual functions in Java?	VAMSI	Mar 30, 2021 12:14	1	340
29	Can you make a constructor final?	VAMSI	Feb 15, 2021 10:54	1	342
30	Can you override a private method in Java?	ROHAN	Jan 18, 2022 23:38	0	186
31	Can you use abstract and final both with a method?	SANJAY	Apr 27, 2021 10:47	1	307
32	Describe and compare fail-fast and fail-safe iterators?	RANJIT	Jan 24, 2022 00:05	0	269
33	Difference between Default and Protected access specifiers?	SANJAY	Jan 28, 2022 03:15	0	266
34	Do I need to import java.lang package any time? Why?	RANJIT	Jun 05, 2021 13:52	1	275
35	do we have DESTRUCTORS in Java? have never seen an example of a destructor program, only constructor?	RANJIT	Mar 29, 2021 12:22	1	343
36	Does constructor return any value?	JOSHUA	Feb 13, 2021 10:40	1	343
37	Does overriding the hashCode() method have any performance implication?	VAMSI	Jan 22, 2022 00:21	0	517
38	Explain the hierarchy of Java Exception classes?	JOSHUA	Sep 20, 2021 01:44	1	302
39	For Instance, a Hotel management system can be termed as a software, an app, and also an Information system. Why so many names for just one thing? The concept of a software, and an Information system, there's no difference here, just the names?	JOSHUA	Apr 20, 2021 12:55	1	241
40	How can constructor chaining be done by using the super keyword?	JOSHUA	Aug 05, 2021 04:13	0	257
41	How can we access some class in another class in Java?	VAMSI	May 29, 2021 09:32	1	308
42	How do you ensure that N thread can access N resources without deadlock?	SANJAY	Jan 21, 2022 01:38	0	282
43	How HashMap works in Java?	JOSHUA	Dec 23, 2021 02:44	0	203
44	How many types of constructors are used in Java?	SANJAY	Feb 13, 2021 10:35	1	333
45	How many types of exception can occur in a Java program?	SANJAY	Sep 17, 2021 02:22	1	298
46	How many types of memory areas are allocated by JVM?	SANJAY	Feb 03, 2021 09:40	1	332
47	How to add Bootstrap to Angular 10?	RANJIT	Mar 09, 2021 11:15	1	335
48	How to make a read-only class in Java?	KRISHNA SWAROOP	May 03, 2021 09:58	1	325
49	How to make a write-only class in Java?	PADMAKEECHU	May 04, 2021 13:11	1	319
50	how we can take list from user?	RANJIT	Apr 23, 2021 11:16	1	308
51	I want to upload a large file for my application. but I'm getting a java heap space error. I use optional when getting the file in my application code. How can I add this file by dividing or shredding it?	RANJIT	Apr 07, 2021 11:50	1	262
52	If I don't provide any arguments on the command line, then what will the value stored in the String array passed into the main() method, empty or NULL?	JOSHUA	Feb 08, 2021 08:50	1	341
53	Is constructor inherited?	RANJIT	Feb 15, 2021 10:50	1	346
54	Is delete, next, main, exit or null keyword in java?	SANJAY	Feb 06, 2021 08:38	1	1002
55	Is Empty .java file name a valid source file name?	VAMSI	Feb 06, 2021 08:31	1	298
56	Is it possible to instantiate the abstract class?	RANJIT	Apr 28, 2021 10:11	1	287
57	Is Java “pass-by-reference” or “pass-by-value”?	VAMSI	Dec 27, 2021 03:33	1	406
58	Is there any difference between nested classes and inner classes?	VAMSI	Jul 17, 2021 13:20	1	270
59	List the features of Java Programming language.	RANJIT	Feb 04, 2021 09:37	1	338
60	Name some classes present in java.util.regex package?	SANJAY	Jul 06, 2021 15:30	1	242
61	One of my s3 is bucket is deleted but i need to restore is there any possible way?	ALLINO	Mar 06, 2021 12:02	0	341
62	RanjitWhat is the output of the following Java program? 1. class Test 2. { 3. int i; 4. } 5. public class Main 6. { 7. public static void main (String args[]) 8. { 9. Test test = new Test(); 10. System.ou	RANJIT	Feb 17, 2021 12:34	1	298
63	What are anonymous inner classes?	ROHAN	Jul 26, 2021 11:43	1	267
64	What are directives?	SANJAY	Jan 25, 2022 06:26	0	249
65	What are the advantages of defining packages in Java?	JOSHUA	Aug 28, 2021 02:48	1	253
66	What are the advantages of Encapsulation in Java?	FRAUSKY	May 04, 2021 13:15	1	305
67	What are the advantages of Java inner classes?	ROHAN	Jul 07, 2021 15:06	1	258
68	What are the advantages of Packages in Java?	RANJIT	Feb 10, 2021 08:27	1	322
69	What are the advantages of passing this into a method instead of the current class object itself?	RANJIT	Feb 24, 2021 11:36	1	316
70	What are the differences between this and super keyword?	SANJAY	Mar 02, 2021 10:40	1	342
71	What are the main differences between the Java platform and other platforms?	SANJAY	Feb 04, 2021 10:00	1	329
72	What are the main uses of the super keyword?	VAMSI	Mar 02, 2021 10:38	1	319
73	What are the main uses of this keyword?	JOSHUA	Feb 24, 2021 11:35	1	317
74	What are the most important features of Java?	GANESH MALLA	Jan 23, 2021 09:46	1	348
75	What are the restrictions that are applied to the Java static methods?	JOSHUA	Feb 18, 2021 12:06	1	323
76	What are the states in the lifecycle of a Thread?	VAMSI	Jan 13, 2022 04:40	0	178
77	What are the various access specifiers in Java?	VAMSI	Feb 09, 2021 11:12	1	334
78	What do you mean by aggregation?	ROHAN	Dec 27, 2021 00:46	1	251
79	What do you understand by BlockingQueue?	JOSHUA	Nov 27, 2021 05:33	0	236
80	What do you understand by copy constructor in Java?	RANJIT	Feb 16, 2021 11:23	1	328
81	What do you understand by inter-thread communication?	SANJAY	Jul 26, 2021 14:34	1	285
82	What do you understand by Java virtual machine?	JOSHUA	Feb 03, 2021 09:22	2	347
83	What gives Java its 'write once and run anywhere' nature?	RANJIT	Feb 06, 2021 08:22	1	318
84	What if I write static public void instead of public static void?	RANJIT	Feb 08, 2021 08:52	1	326
85	What if the static modifier is removed from the signature of the main method?	ROHAN	Feb 20, 2021 09:55	1	334
86	What if the static modifier is removed from the signature of the main method?	VAMSI	Mar 08, 2021 12:41	1	319
87	what is a 'translation look-aside buffer'?	JOSHUA	Apr 23, 2021 11:13	1	364
88	What is a marker interface?	SANJAY	Apr 30, 2021 10:21	1	314
89	What is a virtual file system? Give an example.	SANJAY	Apr 19, 2021 12:18	1	298
90	What is aggregation?	RANJIT	Feb 26, 2021 10:21	1	335
91	What is an object?	VAMSI	Feb 11, 2021 11:44	1	320
92	What is classloader?	JOSHUA	Feb 06, 2021 08:26	1	343
93	What is composition?	SANJAY	Feb 27, 2021 10:19	1	331
94	What is context switching?	JOSHUA	Jul 27, 2021 14:55	1	263
95	What is covariant return type?	ROHAN	Aug 13, 2021 07:28	1	262
96	What is Exception Handling?	JOSHUA	Jun 01, 2021 08:24	1	292
97	What is exception propagation?	VAMSI	Sep 27, 2021 05:41	1	282
98	What is finally block?	ROHAN	Sep 23, 2021 04:49	1	280
99	What is Hibernate Framework?	RANJIT	Sep 06, 2021 08:49	1	228
100	What is Java instance Of operator?	ROHAN	Apr 22, 2021 12:42	1	319
101	What is Java instanceOf operator?	ROHAN	May 29, 2021 09:17	1	303
102	What is JIT compiler?	JOSHUA	Feb 04, 2021 09:43	1	326
103	What is method overloading?	SANJAY	Mar 03, 2021 10:57	1	320
104	What is method overriding?	SANJAY	Mar 06, 2021 10:15	1	313
105	What is object cloning?	RANJIT	Mar 02, 2021 10:43	1	326
106	What is object pooling?	ROHAN	Dec 21, 2021 01:11	1	226
107	What is object-oriented paradigm?	RANJIT	Feb 11, 2021 11:46	1	338
108	What is Runtime Polymorphism?	RANJIT	May 27, 2021 09:23	1	312
109	What is singleton class? where is it used?	VAMSI	Aug 14, 2021 13:05	1	262
110	What is Stack Overflow Java?	JOSHUA	Jan 13, 2022 00:57	0	187
111	What is String Pool?	ROHAN	Oct 08, 2021 05:11	1	282
112	What is super in java?	RANJIT	Aug 03, 2021 04:43	1	267
113	What is the abstract class?	RANJIT	Aug 14, 2021 00:48	1	252
114	What is the abstraction?	VAMSI	Apr 15, 2021 13:06	0	305
115	What is the abstraction?	SANJAY	Apr 22, 2021 12:43	1	305
116	What is the base class for Error and Exception?	ROHAN	Jun 05, 2021 13:56	1	287
117	What is the constructor?	VAMSI	Feb 12, 2021 11:07	1	325
118	What is the default value of the local variables?	SANJAY	Feb 08, 2021 08:56	1	323
119	What is the difference between a synchronized method and a synchronized block?	ROHAN	Dec 21, 2021 01:03	0	209
120	What is the difference between abstraction and encapsulation?	JOSHUA	Apr 15, 2021 13:04	1	295
121	What is the difference between abstraction and encapsulation?	ROHAN	Apr 26, 2021 09:52	1	291
122	What is the difference between aggregation and composition?	RANJIT	Mar 01, 2021 10:55	1	319
123	What is the difference between an object-oriented programming language and object-based programming language?	RANJIT	Feb 12, 2021 11:04	1	315
124	What is the difference between JDK, JRE, and JVM?	VAMSI	Feb 03, 2021 09:37	1	323
125	What is the difference between static binding and dynamic binding?	SANJAY	Apr 21, 2021 12:30	0	339
126	What is the difference between the final method and abstract method?	SANJAY	Apr 10, 2021 12:46	1	347
127	What is the final blank variable?	VAMSI	Apr 02, 2021 13:05	1	342
128	What is the final class?	ROHAN	Apr 01, 2021 13:03	1	338
129	What is the final variable?	SANJAY	Apr 01, 2021 13:04	1	335
130	What is the Inheritance?	RANJIT	Feb 25, 2021 10:01	1	318
131	What is the interface?	JOSHUA	Apr 28, 2021 10:13	1	294
132	What is the meaning of immutable regarding String?	JOSHUA	Oct 18, 2021 01:55	1	279
133	What is the output of the following Java program?	SANJAY	Feb 11, 2021 11:48	1	332
134	*What is the output of the following Java program? 1. class Test 2. { 3. public static void main (String args[]) 4. { 5. System.out.println(10 20 +**	SANJAY	Feb 10, 2021 08:40	1	302
135	What is the output of the following Java program? 1. class Test 2. { 3. public static void main (String args[]) 4. { 5. System.out.println(10 + 20 +	JOSHUA	Feb 10, 2021 08:25	1	328
136	What is the output of the following Java program? 1. class Main { 2. public static void main(String args[]){ 3. final int i; 4. i = 20; 5. System.out.println(i); 6. } 7. }	SANJAY	Apr 08, 2021 12:50	1	344
137	What is the output of the following Java program? 1. public class Test 2. { 3. Test(int a, int b) 4. { 5. System.out.println("a = "+a+" b = "+b); 6. } 7. Test(int a, float b) 8. { 9. System.out.println(	VAMSI	Feb 16, 2021 11:25	1	296
138	What is the package?	VAMSI	Aug 25, 2021 05:38	1	263
139	What is the platform?	VAMSI	Feb 04, 2021 09:53	1	319
140	What is the purpose of a default constructor?	VAMSI	Feb 13, 2021 10:37	1	328
141	What is the purpose of static methods and variables?	JOSHUA	Feb 09, 2021 11:17	1	326
142	What is the purpose of toString() method in Java?	RANJIT	Nov 05, 2021 01:23	0	250
143	What is the purpose of using Buffered Input Stream and Buffered Output Stream classes?	RANJIT	Jul 19, 2021 13:53	1	291
144	What is the purpose of wait() method in Java?	RITA	Nov 23, 2021 06:03	1	229
145	What is the static block?	SANJAY	Feb 19, 2021 11:07	1	339
146	What is the static import?	ROHAN	Sep 13, 2021 00:15	1	302
147	What is the static method?	VAMSI	Feb 18, 2021 12:09	1	330
148	What is the static variable?	VAMSI	Feb 17, 2021 12:36	1	323
149	What is this keyword in java?	RANJIT	Feb 23, 2021 10:58	1	330
150	*what programming language is this? r = s t x = r + 2 m = w + q**	JOSHUA	Mar 30, 2021 11:47	1	328
151	What will be the initial value of an object reference which is defined as an instance variable?	JOSHUA	Feb 12, 2021 11:05	1	328
152	What will happen if we put a key object in a HashMap which is already there?	SANJAY	Dec 24, 2021 05:29	1	253
153	What’s wrong with using HashMap in the multi-threaded environment? When get() method go to the infinite loop?	ROHAN	Jan 07, 2022 00:28	0	508
154	When can an object reference be cast to an interface reference?	VAMSI	May 01, 2021 07:46	1	328
155	When do you override hashcode and equals() ?	ROHAN	Dec 25, 2021 04:28	1	348
156	When to use ArrayList and LinkedList?	RANJIT	Nov 25, 2021 04:55	0	199
157	Which class is the superclass for all the classes?	SANJAY	Feb 25, 2021 10:07	1	312
158	Which is more important - learning to program or learning to debug?	VAMSI	Apr 20, 2021 12:54	1	302
159	while I use to attend web development class, the only JavaScript code our teacher used in the project was the login validation.What other things does JavaScript developers do?	VAMSI	Apr 07, 2021 11:53	1	253
160	Why are the objects immutable in java?	VAMSI	Oct 23, 2021 03:59	1	244
161	Why can we not override static method?	VAMSI	Mar 09, 2021 11:15	1	340
162	Why CharArray() is preferred over String to store the password?	JOSHUA	Jul 06, 2021 09:20	1	268
163	Why Collection doesn’t extend the Cloneable and Serializable interfaces?	SANJAY	Dec 30, 2021 02:07	1	406
164	Why do we have generic programming?	ROHAN	Apr 19, 2021 11:59	1	308
165	Why does Java not support pointers?	ROHAN	Mar 01, 2021 10:57	1	380
166	Why is BST not implemented in Java? Or any Tree based data structure.	VAMSI	Apr 12, 2021 12:27	1	301
167	Why is Inheritance used in Java?	JOSHUA	Feb 25, 2021 10:04	1	319
168	Why is multiple inheritance not supported in java?	ROHAN	Feb 26, 2021 10:16	1	310
169	Why is the main method static?	ROHAN	Feb 18, 2021 12:11	1	325
170	Why Java is not 100% Object-oriented?	JOSHUA	Jan 17, 2022 00:57	0	164
171	Why Java is platform independent?	RANJIT	Jan 20, 2022 05:49	0	228

S.No

Question

Posted By

Date

Answers

Views

S.No

Question

Posted By

Date

Answers

Views

A single try block and multiple catch blocks can co-exist in a Java Program. Explain?

VAMSI

Jan 17, 2022 23:20

191

Briefly explain the concept of constructor overloading?

SANJAY

Jan 10, 2022 23:31

186

Can a class have an interface?

SANJAY

Jul 22, 2021 09:03

308

Can an exception be rethrown?

ROHAN

Aug 07, 2021 11:29

257

Can finally block be used without a catch?

ROHAN

Jul 05, 2021 14:12

298

Can I import same package or class twice? Will the JVM load the package twice at runtime?

RANJIT

Jul 02, 2021 13:34

298

Can I import same package/class twice? Will the JVM load the package twice at runtime?

RANJIT

Sep 07, 2021 00:56

192

Can the Interface be final?

ROHAN

Apr 30, 2021 10:20

338

Can there be an abstract method without an abstract class?

ROHAN

Apr 27, 2021 10:46

321

Can we change the scope of the overridden method in the subclass?

RANJIT

Mar 11, 2021 11:44

566

Can we declare a constructor as final?

RANJIT

Apr 08, 2021 12:56

340

Can we declare an interface as final?

JOSHUA

Apr 08, 2021 12:57

359

Can we declare the static variables and methods in an abstract class?

SANJAY

Feb 20, 2021 10:05

352

Can we define private and protected modifiers for the members in interfaces?

SANJAY

Aug 17, 2021 04:20

271

Can we execute a program without main() method?

RANJIT

Mar 08, 2021 12:39

335

Can we make constructors static?

JOSHUA

Feb 20, 2021 09:56

360

Can we make the abstract methods static in Java?

VAMSI

Feb 20, 2021 10:02

357

Can we modify the throws clause of the superclass method while overriding it in the subclass?

VAMSI

Mar 12, 2021 11:15

406

Can we overload the constructors?

SANJAY

Feb 15, 2021 10:59

349

Can we overload the main() method?

ROHAN

Mar 03, 2021 10:58

332

Can we override the overloaded method?

ROHAN

Mar 11, 2021 11:41

338

Can we override the private methods?

VAMSI

Mar 11, 2021 11:43

329

Can we override the static method?

RANJIT

Mar 06, 2021 10:16

323

Can we override the static methods?

RANJIT

Feb 19, 2021 11:05

337

Can you achieve Runtime Polymorphism by data members?

RANJIT

Apr 20, 2021 12:53

326

Can you declare an interface method static?

VAMSI

Apr 28, 2021 10:14

306

Can you declare the main method as final?

JOSHUA

Apr 06, 2021 12:49

348

Can you have virtual functions in Java?

VAMSI

Mar 30, 2021 12:14

340

Can you make a constructor final?

VAMSI

Feb 15, 2021 10:54

342

Can you override a private method in Java?

ROHAN

Jan 18, 2022 23:38

186

Can you use abstract and final both with a method?

SANJAY

Apr 27, 2021 10:47

307

Describe and compare fail-fast and fail-safe iterators?

RANJIT

Jan 24, 2022 00:05

269

Difference between Default and Protected access specifiers?

SANJAY

Jan 28, 2022 03:15

266

Do I need to import java.lang package any time? Why?

RANJIT

Jun 05, 2021 13:52

275

do we have DESTRUCTORS in Java? have never seen an example of a destructor program, only constructor?

RANJIT

Mar 29, 2021 12:22

343

Does constructor return any value?

JOSHUA

Feb 13, 2021 10:40

343

Does overriding the hashCode() method have any performance implication?

VAMSI

Jan 22, 2022 00:21

517

Explain the hierarchy of Java Exception classes?

JOSHUA

Sep 20, 2021 01:44

302

For Instance, a Hotel management system can be termed as a software, an app, and also an Information system. Why so many names for just one thing? The concept of a software, and an Information system, there's no difference here, just the names?

JOSHUA

Apr 20, 2021 12:55

241

How can constructor chaining be done by using the super keyword?

JOSHUA

Aug 05, 2021 04:13

257

How can we access some class in another class in Java?

VAMSI

May 29, 2021 09:32

308

How do you ensure that N thread can access N resources without deadlock?

SANJAY

Jan 21, 2022 01:38

282

How HashMap works in Java?

JOSHUA

Dec 23, 2021 02:44

203

How many types of constructors are used in Java?

SANJAY

Feb 13, 2021 10:35

333

How many types of exception can occur in a Java program?

SANJAY

Sep 17, 2021 02:22

298

How many types of memory areas are allocated by JVM?

SANJAY

Feb 03, 2021 09:40

332

How to add Bootstrap to Angular 10?

RANJIT

Mar 09, 2021 11:15

335

How to make a read-only class in Java?

KRISHNA SWAROOP

May 03, 2021 09:58

325

How to make a write-only class in Java?

PADMAKEECHU

May 04, 2021 13:11

319

how we can take list from user?

RANJIT

Apr 23, 2021 11:16

308

I want to upload a large file for my application. but I'm getting a java heap space error. I use optional when getting the file in my application code. How can I add this file by dividing or shredding it?

RANJIT

Apr 07, 2021 11:50

262

If I don't provide any arguments on the command line, then what will the value stored in the String array passed into the main() method, empty or NULL?

JOSHUA

Feb 08, 2021 08:50

341

Is constructor inherited?

RANJIT

Feb 15, 2021 10:50

346

Is delete, next, main, exit or null keyword in java?

SANJAY

Feb 06, 2021 08:38

1002

Is Empty .java file name a valid source file name?

VAMSI

Feb 06, 2021 08:31

298

Is it possible to instantiate the abstract class?

RANJIT

Apr 28, 2021 10:11

287

Is Java “pass-by-reference” or “pass-by-value”?

VAMSI

Dec 27, 2021 03:33

406

Is there any difference between nested classes and inner classes?

VAMSI

Jul 17, 2021 13:20

270

List the features of Java Programming language.

RANJIT

Feb 04, 2021 09:37

338

Name some classes present in java.util.regex package?

SANJAY

Jul 06, 2021 15:30

242

One of my s3 is bucket is deleted but i need to restore is there any possible way?

ALLINO

Mar 06, 2021 12:02

341

RanjitWhat is the output of the following Java program? 1. class Test 2. { 3. int i; 4. } 5. public class Main 6. { 7. public static void main (String args[]) 8. { 9. Test test = new Test(); 10. System.ou

RANJIT

Feb 17, 2021 12:34

298

What are anonymous inner classes?

ROHAN

Jul 26, 2021 11:43

267

What are directives?

SANJAY

Jan 25, 2022 06:26

249

What are the advantages of defining packages in Java?

JOSHUA

Aug 28, 2021 02:48

253

What are the advantages of Encapsulation in Java?

FRAUSKY

May 04, 2021 13:15

305

What are the advantages of Java inner classes?

ROHAN

Jul 07, 2021 15:06

258

What are the advantages of Packages in Java?

RANJIT

Feb 10, 2021 08:27

322

What are the advantages of passing this into a method instead of the current class object itself?

RANJIT

Feb 24, 2021 11:36

316

What are the differences between this and super keyword?

SANJAY

Mar 02, 2021 10:40

342

What are the main differences between the Java platform and other platforms?

SANJAY

Feb 04, 2021 10:00

329

What are the main uses of the super keyword?

VAMSI

Mar 02, 2021 10:38

319

What are the main uses of this keyword?

JOSHUA

Feb 24, 2021 11:35

317

What are the most important features of Java?

GANESH MALLA

Jan 23, 2021 09:46

348

What are the restrictions that are applied to the Java static methods?

JOSHUA

Feb 18, 2021 12:06

323

What are the states in the lifecycle of a Thread?

VAMSI

Jan 13, 2022 04:40

178

What are the various access specifiers in Java?

VAMSI

Feb 09, 2021 11:12

334

What do you mean by aggregation?

ROHAN

Dec 27, 2021 00:46

251

What do you understand by BlockingQueue?

JOSHUA

Nov 27, 2021 05:33

236

What do you understand by copy constructor in Java?

RANJIT

Feb 16, 2021 11:23

328

What do you understand by inter-thread communication?

SANJAY

Jul 26, 2021 14:34

285

What do you understand by Java virtual machine?

JOSHUA

Feb 03, 2021 09:22

347

What gives Java its 'write once and run anywhere' nature?

RANJIT

Feb 06, 2021 08:22

318

What if I write static public void instead of public static void?

RANJIT

Feb 08, 2021 08:52

326

What if the static modifier is removed from the signature of the main method?

ROHAN

Feb 20, 2021 09:55

334

What if the static modifier is removed from the signature of the main method?

VAMSI

Mar 08, 2021 12:41

319

what is a 'translation look-aside buffer'?

JOSHUA

Apr 23, 2021 11:13

364

What is a marker interface?

SANJAY

Apr 30, 2021 10:21

314

What is a virtual file system? Give an example.

SANJAY

Apr 19, 2021 12:18

298

What is aggregation?

RANJIT

Feb 26, 2021 10:21

335

What is an object?

VAMSI

Feb 11, 2021 11:44

320

What is classloader?

JOSHUA

Feb 06, 2021 08:26

343

What is composition?

SANJAY

Feb 27, 2021 10:19

331

What is context switching?

JOSHUA

Jul 27, 2021 14:55

263

What is covariant return type?

ROHAN

Aug 13, 2021 07:28

262

What is Exception Handling?

JOSHUA

Jun 01, 2021 08:24

292

What is exception propagation?

VAMSI

Sep 27, 2021 05:41

282

What is finally block?

ROHAN

Sep 23, 2021 04:49

280

What is Hibernate Framework?

RANJIT

Sep 06, 2021 08:49

228

100

What is Java instance Of operator?

ROHAN

Apr 22, 2021 12:42

319

101

What is Java instanceOf operator?

ROHAN

May 29, 2021 09:17

303

102

What is JIT compiler?

JOSHUA

Feb 04, 2021 09:43

326

103

What is method overloading?

SANJAY

Mar 03, 2021 10:57

320

104

What is method overriding?

SANJAY

Mar 06, 2021 10:15

313

105

What is object cloning?

RANJIT

Mar 02, 2021 10:43

326

106

What is object pooling?

ROHAN

Dec 21, 2021 01:11

226

107

What is object-oriented paradigm?

RANJIT

Feb 11, 2021 11:46

338

108

What is Runtime Polymorphism?

RANJIT

May 27, 2021 09:23

312

109

What is singleton class? where is it used?

VAMSI

Aug 14, 2021 13:05

262

110

What is Stack Overflow Java?

JOSHUA

Jan 13, 2022 00:57

187

111

What is String Pool?

ROHAN

Oct 08, 2021 05:11

282

112

What is super in java?

RANJIT

Aug 03, 2021 04:43

267

113

What is the abstract class?

RANJIT

Aug 14, 2021 00:48

252

114

What is the abstraction?

VAMSI

Apr 15, 2021 13:06

305

115

What is the abstraction?

SANJAY

Apr 22, 2021 12:43

305

116

What is the base class for Error and Exception?

ROHAN

Jun 05, 2021 13:56

287

117

What is the constructor?

VAMSI

Feb 12, 2021 11:07

325

118

What is the default value of the local variables?

SANJAY

Feb 08, 2021 08:56

323

119

What is the difference between a synchronized method and a synchronized block?

ROHAN

Dec 21, 2021 01:03

209

120

What is the difference between abstraction and encapsulation?

JOSHUA

Apr 15, 2021 13:04

295

121

What is the difference between abstraction and encapsulation?

ROHAN

Apr 26, 2021 09:52

291

122

What is the difference between aggregation and composition?

RANJIT

Mar 01, 2021 10:55

319

123

What is the difference between an object-oriented programming language and object-based programming language?

RANJIT

Feb 12, 2021 11:04

315

124

What is the difference between JDK, JRE, and JVM?

VAMSI

Feb 03, 2021 09:37

323

125

What is the difference between static binding and dynamic binding?

SANJAY

Apr 21, 2021 12:30

339

126

What is the difference between the final method and abstract method?

SANJAY

Apr 10, 2021 12:46

347

127

What is the final blank variable?

VAMSI

Apr 02, 2021 13:05

342

128

What is the final class?

ROHAN

Apr 01, 2021 13:03

338

129

What is the final variable?

SANJAY

Apr 01, 2021 13:04

335

130

What is the Inheritance?

RANJIT

Feb 25, 2021 10:01

318

131

What is the interface?

JOSHUA

Apr 28, 2021 10:13

294

132

What is the meaning of immutable regarding String?

JOSHUA

Oct 18, 2021 01:55

279

133

What is the output of the following Java program?

SANJAY

Feb 11, 2021 11:48

332

134

What is the output of the following Java program? 1. class Test 2. { 3. public static void main (String args[]) 4. { 5. System.out.println(10 * 20 +

SANJAY

Feb 10, 2021 08:40

302

135

What is the output of the following Java program? 1. class Test 2. { 3. public static void main (String args[]) 4. { 5. System.out.println(10 + 20 +

JOSHUA

Feb 10, 2021 08:25

328

136

What is the output of the following Java program? 1. class Main { 2. public static void main(String args[]){ 3. final int i; 4. i = 20; 5. System.out.println(i); 6. } 7. }

SANJAY

Apr 08, 2021 12:50

344

137

What is the output of the following Java program? 1. public class Test 2. { 3. Test(int a, int b) 4. { 5. System.out.println("a = "+a+" b = "+b); 6. } 7. Test(int a, float b) 8. { 9. System.out.println(

VAMSI

Feb 16, 2021 11:25

296

138

What is the package?

VAMSI

Aug 25, 2021 05:38

263

139

What is the platform?

VAMSI

Feb 04, 2021 09:53

319

140

What is the purpose of a default constructor?

VAMSI

Feb 13, 2021 10:37

328

141

What is the purpose of static methods and variables?

JOSHUA

Feb 09, 2021 11:17

326

142

What is the purpose of toString() method in Java?

RANJIT

Nov 05, 2021 01:23

250

143

What is the purpose of using Buffered Input Stream and Buffered Output Stream classes?

RANJIT

Jul 19, 2021 13:53

291

144

What is the purpose of wait() method in Java?

RITA

Nov 23, 2021 06:03

229

145

What is the static block?

SANJAY

Feb 19, 2021 11:07

339

146

What is the static import?

ROHAN

Sep 13, 2021 00:15

302

147

What is the static method?

VAMSI

Feb 18, 2021 12:09

330

148

What is the static variable?

VAMSI

Feb 17, 2021 12:36

323

149

What is this keyword in java?

RANJIT

Feb 23, 2021 10:58

330

150

what programming language is this? r = s * t x = r + 2 m = w + q

JOSHUA

Mar 30, 2021 11:47

328

151

What will be the initial value of an object reference which is defined as an instance variable?

JOSHUA

Feb 12, 2021 11:05

328

152

What will happen if we put a key object in a HashMap which is already there?

SANJAY

Dec 24, 2021 05:29

253

153

What’s wrong with using HashMap in the multi-threaded environment? When get() method go to the infinite loop?

ROHAN

Jan 07, 2022 00:28

508

154

When can an object reference be cast to an interface reference?

VAMSI

May 01, 2021 07:46

328

155

When do you override hashcode and equals() ?

ROHAN

Dec 25, 2021 04:28

348

156

When to use ArrayList and LinkedList?

RANJIT

Nov 25, 2021 04:55

199

157

Which class is the superclass for all the classes?

SANJAY

Feb 25, 2021 10:07

312

158

Which is more important - learning to program or learning to debug?

VAMSI

Apr 20, 2021 12:54

302

159

while I use to attend web development class, the only JavaScript code our teacher used in the project was the login validation.What other things does JavaScript developers do?

VAMSI

Apr 07, 2021 11:53

253

160

Why are the objects immutable in java?

VAMSI

Oct 23, 2021 03:59

244

161

Why can we not override static method?

VAMSI

Mar 09, 2021 11:15

340

162

Why CharArray() is preferred over String to store the password?

JOSHUA

Jul 06, 2021 09:20

268

163

Why Collection doesn’t extend the Cloneable and Serializable interfaces?

SANJAY

Dec 30, 2021 02:07

406

164

Why do we have generic programming?

ROHAN

Apr 19, 2021 11:59

308

165

Why does Java not support pointers?

ROHAN

Mar 01, 2021 10:57

380

166

Why is BST not implemented in Java? Or any Tree based data structure.

VAMSI

Apr 12, 2021 12:27

301

167

Why is Inheritance used in Java?

JOSHUA

Feb 25, 2021 10:04

319

168

Why is multiple inheritance not supported in java?

ROHAN

Feb 26, 2021 10:16

310

169

Why is the main method static?

ROHAN

Feb 18, 2021 12:11

325

170

Why Java is not 100% Object-oriented?

JOSHUA

Jan 17, 2022 00:57

164

171

Why Java is platform independent?

RANJIT

Jan 20, 2022 05:49

228

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