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	50
2	Briefly explain the concept of constructor overloading?	SANJAY	Jan 10, 2022 23:31	0	51
3	Can a class have an interface?	SANJAY	Jul 22, 2021 09:03	1	163
4	Can an exception be rethrown?	ROHAN	Aug 07, 2021 11:29	1	131
5	Can finally block be used without a catch?	ROHAN	Jul 05, 2021 14:12	1	160
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	158
7	Can I import same package/class twice? Will the JVM load the package twice at runtime?	RANJIT	Sep 07, 2021 00:56	0	84
8	Can the Interface be final?	ROHAN	Apr 30, 2021 10:20	1	197
9	Can there be an abstract method without an abstract class?	ROHAN	Apr 27, 2021 10:46	1	187
10	Can we change the scope of the overridden method in the subclass?	RANJIT	Mar 11, 2021 11:44	1	296
11	Can we declare a constructor as final?	RANJIT	Apr 08, 2021 12:56	2	203
12	Can we declare an interface as final?	JOSHUA	Apr 08, 2021 12:57	0	208
13	Can we declare the static variables and methods in an abstract class?	SANJAY	Feb 20, 2021 10:05	1	199
14	Can we define private and protected modifiers for the members in interfaces?	SANJAY	Aug 17, 2021 04:20	1	138
15	Can we execute a program without main() method?	RANJIT	Mar 08, 2021 12:39	1	200
16	Can we make constructors static?	JOSHUA	Feb 20, 2021 09:56	1	217
17	Can we make the abstract methods static in Java?	VAMSI	Feb 20, 2021 10:02	1	210
18	Can we modify the throws clause of the superclass method while overriding it in the subclass?	VAMSI	Mar 12, 2021 11:15	1	254
19	Can we overload the constructors?	SANJAY	Feb 15, 2021 10:59	1	212
20	Can we overload the main() method?	ROHAN	Mar 03, 2021 10:58	1	197
21	Can we override the overloaded method?	ROHAN	Mar 11, 2021 11:41	1	205
22	Can we override the private methods?	VAMSI	Mar 11, 2021 11:43	1	192
23	Can we override the static method?	RANJIT	Mar 06, 2021 10:16	1	197
24	Can we override the static methods?	RANJIT	Feb 19, 2021 11:05	1	199
25	Can you achieve Runtime Polymorphism by data members?	RANJIT	Apr 20, 2021 12:53	1	186
26	Can you declare an interface method static?	VAMSI	Apr 28, 2021 10:14	1	173
27	Can you declare the main method as final?	JOSHUA	Apr 06, 2021 12:49	1	206
28	Can you have virtual functions in Java?	VAMSI	Mar 30, 2021 12:14	1	209
29	Can you make a constructor final?	VAMSI	Feb 15, 2021 10:54	1	209
30	Can you override a private method in Java?	ROHAN	Jan 18, 2022 23:38	0	51
31	Can you use abstract and final both with a method?	SANJAY	Apr 27, 2021 10:47	1	178
32	Describe and compare fail-fast and fail-safe iterators?	RANJIT	Jan 24, 2022 00:05	0	88
33	Difference between Default and Protected access specifiers?	SANJAY	Jan 28, 2022 03:15	0	80
34	Do I need to import java.lang package any time? Why?	RANJIT	Jun 05, 2021 13:52	1	150
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	209
36	Does constructor return any value?	JOSHUA	Feb 13, 2021 10:40	1	206
37	Does overriding the hashCode() method have any performance implication?	VAMSI	Jan 22, 2022 00:21	0	205
38	Explain the hierarchy of Java Exception classes?	JOSHUA	Sep 20, 2021 01:44	1	145
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	147
40	How can constructor chaining be done by using the super keyword?	JOSHUA	Aug 05, 2021 04:13	0	133
41	How can we access some class in another class in Java?	VAMSI	May 29, 2021 09:32	1	172
42	How do you ensure that N thread can access N resources without deadlock?	SANJAY	Jan 21, 2022 01:38	0	78
43	How HashMap works in Java?	JOSHUA	Dec 23, 2021 02:44	0	75
44	How many types of constructors are used in Java?	SANJAY	Feb 13, 2021 10:35	1	207
45	How many types of exception can occur in a Java program?	SANJAY	Sep 17, 2021 02:22	1	153
46	How many types of memory areas are allocated by JVM?	SANJAY	Feb 03, 2021 09:40	1	209
47	How to add Bootstrap to Angular 10?	RANJIT	Mar 09, 2021 11:15	1	205
48	How to make a read-only class in Java?	KRISHNA SWAROOP	May 03, 2021 09:58	1	193
49	How to make a write-only class in Java?	PADMAKEECHU	May 04, 2021 13:11	1	183
50	how we can take list from user?	RANJIT	Apr 23, 2021 11:16	1	186
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	155
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	223
53	Is constructor inherited?	RANJIT	Feb 15, 2021 10:50	1	215
54	Is delete, next, main, exit or null keyword in java?	SANJAY	Feb 06, 2021 08:38	1	449
55	Is Empty .java file name a valid source file name?	VAMSI	Feb 06, 2021 08:31	1	188
56	Is it possible to instantiate the abstract class?	RANJIT	Apr 28, 2021 10:11	1	164
57	Is Java “pass-by-reference” or “pass-by-value”?	VAMSI	Dec 27, 2021 03:33	1	148
58	Is there any difference between nested classes and inner classes?	VAMSI	Jul 17, 2021 13:20	1	135
59	List the features of Java Programming language.	RANJIT	Feb 04, 2021 09:37	1	211
60	Name some classes present in java.util.regex package?	SANJAY	Jul 06, 2021 15:30	1	129
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	209
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	180
63	What are anonymous inner classes?	ROHAN	Jul 26, 2021 11:43	1	134
64	What are directives?	SANJAY	Jan 25, 2022 06:26	0	67
65	What are the advantages of defining packages in Java?	JOSHUA	Aug 28, 2021 02:48	1	128
66	What are the advantages of Encapsulation in Java?	FRAUSKY	May 04, 2021 13:15	1	174
67	What are the advantages of Java inner classes?	ROHAN	Jul 07, 2021 15:06	1	127
68	What are the advantages of Packages in Java?	RANJIT	Feb 10, 2021 08:27	1	196
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	196
70	What are the differences between this and super keyword?	SANJAY	Mar 02, 2021 10:40	1	223
71	What are the main differences between the Java platform and other platforms?	SANJAY	Feb 04, 2021 10:00	1	205
72	What are the main uses of the super keyword?	VAMSI	Mar 02, 2021 10:38	1	198
73	What are the main uses of this keyword?	JOSHUA	Feb 24, 2021 11:35	1	193
74	What are the most important features of Java?	GANESH MALLA	Jan 23, 2021 09:46	1	214
75	What are the restrictions that are applied to the Java static methods?	JOSHUA	Feb 18, 2021 12:06	1	194
76	What are the states in the lifecycle of a Thread?	VAMSI	Jan 13, 2022 04:40	0	52
77	What are the various access specifiers in Java?	VAMSI	Feb 09, 2021 11:12	1	215
78	What do you mean by aggregation?	ROHAN	Dec 27, 2021 00:46	1	99
79	What do you understand by BlockingQueue?	JOSHUA	Nov 27, 2021 05:33	0	91
80	What do you understand by copy constructor in Java?	RANJIT	Feb 16, 2021 11:23	1	198
81	What do you understand by inter-thread communication?	SANJAY	Jul 26, 2021 14:34	1	158
82	What do you understand by Java virtual machine?	JOSHUA	Feb 03, 2021 09:22	2	222
83	What gives Java its 'write once and run anywhere' nature?	RANJIT	Feb 06, 2021 08:22	1	198
84	What if I write static public void instead of public static void?	RANJIT	Feb 08, 2021 08:52	1	204
85	What if the static modifier is removed from the signature of the main method?	ROHAN	Feb 20, 2021 09:55	1	191
86	What if the static modifier is removed from the signature of the main method?	VAMSI	Mar 08, 2021 12:41	1	189
87	what is a 'translation look-aside buffer'?	JOSHUA	Apr 23, 2021 11:13	1	192
88	What is a marker interface?	SANJAY	Apr 30, 2021 10:21	1	176
89	What is a virtual file system? Give an example.	SANJAY	Apr 19, 2021 12:18	1	175
90	What is aggregation?	RANJIT	Feb 26, 2021 10:21	1	210
91	What is an object?	VAMSI	Feb 11, 2021 11:44	1	200
92	What is classloader?	JOSHUA	Feb 06, 2021 08:26	1	210
93	What is composition?	SANJAY	Feb 27, 2021 10:19	1	199
94	What is context switching?	JOSHUA	Jul 27, 2021 14:55	1	138
95	What is covariant return type?	ROHAN	Aug 13, 2021 07:28	1	135
96	What is Exception Handling?	JOSHUA	Jun 01, 2021 08:24	1	154
97	What is exception propagation?	VAMSI	Sep 27, 2021 05:41	1	139
98	What is finally block?	ROHAN	Sep 23, 2021 04:49	1	127
99	What is Hibernate Framework?	RANJIT	Sep 06, 2021 08:49	1	109
100	What is Java instance Of operator?	ROHAN	Apr 22, 2021 12:42	1	191
101	What is Java instanceOf operator?	ROHAN	May 29, 2021 09:17	1	161
102	What is JIT compiler?	JOSHUA	Feb 04, 2021 09:43	1	206
103	What is method overloading?	SANJAY	Mar 03, 2021 10:57	1	193
104	What is method overriding?	SANJAY	Mar 06, 2021 10:15	1	186
105	What is object cloning?	RANJIT	Mar 02, 2021 10:43	1	204
106	What is object pooling?	ROHAN	Dec 21, 2021 01:11	1	89
107	What is object-oriented paradigm?	RANJIT	Feb 11, 2021 11:46	1	215
108	What is Runtime Polymorphism?	RANJIT	May 27, 2021 09:23	1	178
109	What is singleton class? where is it used?	VAMSI	Aug 14, 2021 13:05	1	138
110	What is Stack Overflow Java?	JOSHUA	Jan 13, 2022 00:57	0	50
111	What is String Pool?	ROHAN	Oct 08, 2021 05:11	1	133
112	What is super in java?	RANJIT	Aug 03, 2021 04:43	1	135
113	What is the abstract class?	RANJIT	Aug 14, 2021 00:48	1	130
114	What is the abstraction?	VAMSI	Apr 15, 2021 13:06	0	178
115	What is the abstraction?	SANJAY	Apr 22, 2021 12:43	1	183
116	What is the base class for Error and Exception?	ROHAN	Jun 05, 2021 13:56	1	150
117	What is the constructor?	VAMSI	Feb 12, 2021 11:07	1	202
118	What is the default value of the local variables?	SANJAY	Feb 08, 2021 08:56	1	203
119	What is the difference between a synchronized method and a synchronized block?	ROHAN	Dec 21, 2021 01:03	0	79
120	What is the difference between abstraction and encapsulation?	JOSHUA	Apr 15, 2021 13:04	1	169
121	What is the difference between abstraction and encapsulation?	ROHAN	Apr 26, 2021 09:52	1	161
122	What is the difference between aggregation and composition?	RANJIT	Mar 01, 2021 10:55	1	195
123	What is the difference between an object-oriented programming language and object-based programming language?	RANJIT	Feb 12, 2021 11:04	1	192
124	What is the difference between JDK, JRE, and JVM?	VAMSI	Feb 03, 2021 09:37	1	199
125	What is the difference between static binding and dynamic binding?	SANJAY	Apr 21, 2021 12:30	0	209
126	What is the difference between the final method and abstract method?	SANJAY	Apr 10, 2021 12:46	1	199
127	What is the final blank variable?	VAMSI	Apr 02, 2021 13:05	1	199
128	What is the final class?	ROHAN	Apr 01, 2021 13:03	1	205
129	What is the final variable?	SANJAY	Apr 01, 2021 13:04	1	196
130	What is the Inheritance?	RANJIT	Feb 25, 2021 10:01	1	197
131	What is the interface?	JOSHUA	Apr 28, 2021 10:13	1	170
132	What is the meaning of immutable regarding String?	JOSHUA	Oct 18, 2021 01:55	1	135
133	What is the output of the following Java program?	SANJAY	Feb 11, 2021 11:48	1	212
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	184
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	196
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	217
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	179
138	What is the package?	VAMSI	Aug 25, 2021 05:38	1	136
139	What is the platform?	VAMSI	Feb 04, 2021 09:53	1	204
140	What is the purpose of a default constructor?	VAMSI	Feb 13, 2021 10:37	1	200
141	What is the purpose of static methods and variables?	JOSHUA	Feb 09, 2021 11:17	1	203
142	What is the purpose of toString() method in Java?	RANJIT	Nov 05, 2021 01:23	0	105
143	What is the purpose of using Buffered Input Stream and Buffered Output Stream classes?	RANJIT	Jul 19, 2021 13:53	1	150
144	What is the purpose of wait() method in Java?	RITA	Nov 23, 2021 06:03	1	83
145	What is the static block?	SANJAY	Feb 19, 2021 11:07	1	200
146	What is the static import?	ROHAN	Sep 13, 2021 00:15	1	127
147	What is the static method?	VAMSI	Feb 18, 2021 12:09	1	198
148	What is the static variable?	VAMSI	Feb 17, 2021 12:36	1	198
149	What is this keyword in java?	RANJIT	Feb 23, 2021 10:58	1	198
150	*what programming language is this? r = s t x = r + 2 m = w + q**	JOSHUA	Mar 30, 2021 11:47	1	200
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	204
152	What will happen if we put a key object in a HashMap which is already there?	SANJAY	Dec 24, 2021 05:29	1	111
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	124
154	When can an object reference be cast to an interface reference?	VAMSI	May 01, 2021 07:46	1	177
155	When do you override hashcode and equals() ?	ROHAN	Dec 25, 2021 04:28	1	199
156	When to use ArrayList and LinkedList?	RANJIT	Nov 25, 2021 04:55	0	81
157	Which class is the superclass for all the classes?	SANJAY	Feb 25, 2021 10:07	1	187
158	Which is more important - learning to program or learning to debug?	VAMSI	Apr 20, 2021 12:54	1	173
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	148
160	Why are the objects immutable in java?	VAMSI	Oct 23, 2021 03:59	1	112
161	Why can we not override static method?	VAMSI	Mar 09, 2021 11:15	1	211
162	Why CharArray() is preferred over String to store the password?	JOSHUA	Jul 06, 2021 09:20	1	140
163	Why Collection doesn’t extend the Cloneable and Serializable interfaces?	SANJAY	Dec 30, 2021 02:07	1	149
164	Why do we have generic programming?	ROHAN	Apr 19, 2021 11:59	1	184
165	Why does Java not support pointers?	ROHAN	Mar 01, 2021 10:57	1	254
166	Why is BST not implemented in Java? Or any Tree based data structure.	VAMSI	Apr 12, 2021 12:27	1	176
167	Why is Inheritance used in Java?	JOSHUA	Feb 25, 2021 10:04	1	196
168	Why is multiple inheritance not supported in java?	ROHAN	Feb 26, 2021 10:16	1	187
169	Why is the main method static?	ROHAN	Feb 18, 2021 12:11	1	195
170	Why Java is not 100% Object-oriented?	JOSHUA	Jan 17, 2022 00:57	0	49
171	Why Java is platform independent?	RANJIT	Jan 20, 2022 05:49	0	57

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

Briefly explain the concept of constructor overloading?

SANJAY

Jan 10, 2022 23:31

Can a class have an interface?

SANJAY

Jul 22, 2021 09:03

163

Can an exception be rethrown?

ROHAN

Aug 07, 2021 11:29

131

Can finally block be used without a catch?

ROHAN

Jul 05, 2021 14:12

160

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

RANJIT

Jul 02, 2021 13:34

158

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

RANJIT

Sep 07, 2021 00:56

Can the Interface be final?

ROHAN

Apr 30, 2021 10:20

197

Can there be an abstract method without an abstract class?

ROHAN

Apr 27, 2021 10:46

187

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

RANJIT

Mar 11, 2021 11:44

296

Can we declare a constructor as final?

RANJIT

Apr 08, 2021 12:56

203

Can we declare an interface as final?

JOSHUA

Apr 08, 2021 12:57

208

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

SANJAY

Feb 20, 2021 10:05

199

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

SANJAY

Aug 17, 2021 04:20

138

Can we execute a program without main() method?

RANJIT

Mar 08, 2021 12:39

200

Can we make constructors static?

JOSHUA

Feb 20, 2021 09:56

217

Can we make the abstract methods static in Java?

VAMSI

Feb 20, 2021 10:02

210

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

VAMSI

Mar 12, 2021 11:15

254

Can we overload the constructors?

SANJAY

Feb 15, 2021 10:59

212

Can we overload the main() method?

ROHAN

Mar 03, 2021 10:58

197

Can we override the overloaded method?

ROHAN

Mar 11, 2021 11:41

205

Can we override the private methods?

VAMSI

Mar 11, 2021 11:43

192

Can we override the static method?

RANJIT

Mar 06, 2021 10:16

197

Can we override the static methods?

RANJIT

Feb 19, 2021 11:05

199

Can you achieve Runtime Polymorphism by data members?

RANJIT

Apr 20, 2021 12:53

186

Can you declare an interface method static?

VAMSI

Apr 28, 2021 10:14

173

Can you declare the main method as final?

JOSHUA

Apr 06, 2021 12:49

206

Can you have virtual functions in Java?

VAMSI

Mar 30, 2021 12:14

209

Can you make a constructor final?

VAMSI

Feb 15, 2021 10:54

209

Can you override a private method in Java?

ROHAN

Jan 18, 2022 23:38

Can you use abstract and final both with a method?

SANJAY

Apr 27, 2021 10:47

178

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

RANJIT

Jan 24, 2022 00:05

Difference between Default and Protected access specifiers?

SANJAY

Jan 28, 2022 03:15

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

RANJIT

Jun 05, 2021 13:52

150

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

RANJIT

Mar 29, 2021 12:22

209

Does constructor return any value?

JOSHUA

Feb 13, 2021 10:40

206

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

VAMSI

Jan 22, 2022 00:21

205

Explain the hierarchy of Java Exception classes?

JOSHUA

Sep 20, 2021 01:44

145

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

147

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

JOSHUA

Aug 05, 2021 04:13

133

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

VAMSI

May 29, 2021 09:32

172

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

SANJAY

Jan 21, 2022 01:38

How HashMap works in Java?

JOSHUA

Dec 23, 2021 02:44

How many types of constructors are used in Java?

SANJAY

Feb 13, 2021 10:35

207

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

SANJAY

Sep 17, 2021 02:22

153

How many types of memory areas are allocated by JVM?

SANJAY

Feb 03, 2021 09:40

209

How to add Bootstrap to Angular 10?

RANJIT

Mar 09, 2021 11:15

205

How to make a read-only class in Java?

KRISHNA SWAROOP

May 03, 2021 09:58

193

How to make a write-only class in Java?

PADMAKEECHU

May 04, 2021 13:11

183

how we can take list from user?

RANJIT

Apr 23, 2021 11:16

186

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

155

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

223

Is constructor inherited?

RANJIT

Feb 15, 2021 10:50

215

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

SANJAY

Feb 06, 2021 08:38

449

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

VAMSI

Feb 06, 2021 08:31

188

Is it possible to instantiate the abstract class?

RANJIT

Apr 28, 2021 10:11

164

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

VAMSI

Dec 27, 2021 03:33

148

Is there any difference between nested classes and inner classes?

VAMSI

Jul 17, 2021 13:20

135

List the features of Java Programming language.

RANJIT

Feb 04, 2021 09:37

211

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

SANJAY

Jul 06, 2021 15:30

129

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

ALLINO

Mar 06, 2021 12:02

209

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

180

What are anonymous inner classes?

ROHAN

Jul 26, 2021 11:43

134

What are directives?

SANJAY

Jan 25, 2022 06:26

What are the advantages of defining packages in Java?

JOSHUA

Aug 28, 2021 02:48

128

What are the advantages of Encapsulation in Java?

FRAUSKY

May 04, 2021 13:15

174

What are the advantages of Java inner classes?

ROHAN

Jul 07, 2021 15:06

127

What are the advantages of Packages in Java?

RANJIT

Feb 10, 2021 08:27

196

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

RANJIT

Feb 24, 2021 11:36

196

What are the differences between this and super keyword?

SANJAY

Mar 02, 2021 10:40

223

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

SANJAY

Feb 04, 2021 10:00

205

What are the main uses of the super keyword?

VAMSI

Mar 02, 2021 10:38

198

What are the main uses of this keyword?

JOSHUA

Feb 24, 2021 11:35

193

What are the most important features of Java?

GANESH MALLA

Jan 23, 2021 09:46

214

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

JOSHUA

Feb 18, 2021 12:06

194

What are the states in the lifecycle of a Thread?

VAMSI

Jan 13, 2022 04:40

What are the various access specifiers in Java?

VAMSI

Feb 09, 2021 11:12

215

What do you mean by aggregation?

ROHAN

Dec 27, 2021 00:46

What do you understand by BlockingQueue?

JOSHUA

Nov 27, 2021 05:33

What do you understand by copy constructor in Java?

RANJIT

Feb 16, 2021 11:23

198

What do you understand by inter-thread communication?

SANJAY

Jul 26, 2021 14:34

158

What do you understand by Java virtual machine?

JOSHUA

Feb 03, 2021 09:22

222

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

RANJIT

Feb 06, 2021 08:22

198

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

RANJIT

Feb 08, 2021 08:52

204

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

ROHAN

Feb 20, 2021 09:55

191

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

VAMSI

Mar 08, 2021 12:41

189

what is a 'translation look-aside buffer'?

JOSHUA

Apr 23, 2021 11:13

192

What is a marker interface?

SANJAY

Apr 30, 2021 10:21

176

What is a virtual file system? Give an example.

SANJAY

Apr 19, 2021 12:18

175

What is aggregation?

RANJIT

Feb 26, 2021 10:21

210

What is an object?

VAMSI

Feb 11, 2021 11:44

200

What is classloader?

JOSHUA

Feb 06, 2021 08:26

210

What is composition?

SANJAY

Feb 27, 2021 10:19

199

What is context switching?

JOSHUA

Jul 27, 2021 14:55

138

What is covariant return type?

ROHAN

Aug 13, 2021 07:28

135

What is Exception Handling?

JOSHUA

Jun 01, 2021 08:24

154

What is exception propagation?

VAMSI

Sep 27, 2021 05:41

139

What is finally block?

ROHAN

Sep 23, 2021 04:49

127

What is Hibernate Framework?

RANJIT

Sep 06, 2021 08:49

109

100

What is Java instance Of operator?

ROHAN

Apr 22, 2021 12:42

191

101

What is Java instanceOf operator?

ROHAN

May 29, 2021 09:17

161

102

What is JIT compiler?

JOSHUA

Feb 04, 2021 09:43

206

103

What is method overloading?

SANJAY

Mar 03, 2021 10:57

193

104

What is method overriding?

SANJAY

Mar 06, 2021 10:15

186

105

What is object cloning?

RANJIT

Mar 02, 2021 10:43

204

106

What is object pooling?

ROHAN

Dec 21, 2021 01:11

107

What is object-oriented paradigm?

RANJIT

Feb 11, 2021 11:46

215

108

What is Runtime Polymorphism?

RANJIT

May 27, 2021 09:23

178

109

What is singleton class? where is it used?

VAMSI

Aug 14, 2021 13:05

138

110

What is Stack Overflow Java?

JOSHUA

Jan 13, 2022 00:57

111

What is String Pool?

ROHAN

Oct 08, 2021 05:11

133

112

What is super in java?

RANJIT

Aug 03, 2021 04:43

135

113

What is the abstract class?

RANJIT

Aug 14, 2021 00:48

130

114

What is the abstraction?

VAMSI

Apr 15, 2021 13:06

178

115

What is the abstraction?

SANJAY

Apr 22, 2021 12:43

183

116

What is the base class for Error and Exception?

ROHAN

Jun 05, 2021 13:56

150

117

What is the constructor?

VAMSI

Feb 12, 2021 11:07

202

118

What is the default value of the local variables?

SANJAY

Feb 08, 2021 08:56

203

119

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

ROHAN

Dec 21, 2021 01:03

120

What is the difference between abstraction and encapsulation?

JOSHUA

Apr 15, 2021 13:04

169

121

What is the difference between abstraction and encapsulation?

ROHAN

Apr 26, 2021 09:52

161

122

What is the difference between aggregation and composition?

RANJIT

Mar 01, 2021 10:55

195

123

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

RANJIT

Feb 12, 2021 11:04

192

124

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

VAMSI

Feb 03, 2021 09:37

199

125

What is the difference between static binding and dynamic binding?

SANJAY

Apr 21, 2021 12:30

209

126

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

SANJAY

Apr 10, 2021 12:46

199

127

What is the final blank variable?

VAMSI

Apr 02, 2021 13:05

199

128

What is the final class?

ROHAN

Apr 01, 2021 13:03

205

129

What is the final variable?

SANJAY

Apr 01, 2021 13:04

196

130

What is the Inheritance?

RANJIT

Feb 25, 2021 10:01

197

131

What is the interface?

JOSHUA

Apr 28, 2021 10:13

170

132

What is the meaning of immutable regarding String?

JOSHUA

Oct 18, 2021 01:55

135

133

What is the output of the following Java program?

SANJAY

Feb 11, 2021 11:48

212

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

184

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

196

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

217

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

179

138

What is the package?

VAMSI

Aug 25, 2021 05:38

136

139

What is the platform?

VAMSI

Feb 04, 2021 09:53

204

140

What is the purpose of a default constructor?

VAMSI

Feb 13, 2021 10:37

200

141

What is the purpose of static methods and variables?

JOSHUA

Feb 09, 2021 11:17

203

142

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

RANJIT

Nov 05, 2021 01:23

105

143

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

RANJIT

Jul 19, 2021 13:53

150

144

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

RITA

Nov 23, 2021 06:03

145

What is the static block?

SANJAY

Feb 19, 2021 11:07

200

146

What is the static import?

ROHAN

Sep 13, 2021 00:15

127

147

What is the static method?

VAMSI

Feb 18, 2021 12:09

198

148

What is the static variable?

VAMSI

Feb 17, 2021 12:36

198

149

What is this keyword in java?

RANJIT

Feb 23, 2021 10:58

198

150

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

JOSHUA

Mar 30, 2021 11:47

200

151

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

JOSHUA

Feb 12, 2021 11:05

204

152

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

SANJAY

Dec 24, 2021 05:29

111

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

124

154

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

VAMSI

May 01, 2021 07:46

177

155

When do you override hashcode and equals() ?

ROHAN

Dec 25, 2021 04:28

199

156

When to use ArrayList and LinkedList?

RANJIT

Nov 25, 2021 04:55

157

Which class is the superclass for all the classes?

SANJAY

Feb 25, 2021 10:07

187

158

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

VAMSI

Apr 20, 2021 12:54

173

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

148

160

Why are the objects immutable in java?

VAMSI

Oct 23, 2021 03:59

112

161

Why can we not override static method?

VAMSI

Mar 09, 2021 11:15

211

162

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

JOSHUA

Jul 06, 2021 09:20

140

163

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

SANJAY

Dec 30, 2021 02:07

149

164

Why do we have generic programming?

ROHAN

Apr 19, 2021 11:59

184

165

Why does Java not support pointers?

ROHAN

Mar 01, 2021 10:57

254

166

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

VAMSI

Apr 12, 2021 12:27

176

167

Why is Inheritance used in Java?

JOSHUA

Feb 25, 2021 10:04

196

168

Why is multiple inheritance not supported in java?

ROHAN

Feb 26, 2021 10:16

187

169

Why is the main method static?

ROHAN

Feb 18, 2021 12:11

195

170

Why Java is not 100% Object-oriented?

JOSHUA

Jan 17, 2022 00:57

171

Why Java is platform independent?

RANJIT

Jan 20, 2022 05:49

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