Search Interview Questions |  More than 3000 questions in repository. There are more than 900 unanswered questions. Click here and help us by providing the answer. Have a video suggestion. Click Correct / Improve and please let us know. |
|
|||
|
| ||||
| Interview Questions and Answers for 'Velopsy' - 2 question(s) found - Order By Rating | ||||
 Very frequently asked. Usually asked in different variants like Diff between StringBuffer , String Builder ; Difference between StringBuilder and String class; Choice between these classes etc. | ||||
| ||||
| Ans. A string buffer implements a mutable sequence of characters. A string buffer is like a String, but can be modified. At any point in time it contains some particular sequence of characters, but the length and content of the sequence can be changed through certain method calls. The String class represents character strings. All string literals in Java programs, such as "abc" are constant and implemented as instances of this class; their values cannot be changed after they are created. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
 Discuss Correct / Improve  java string stringbuffer frequently asked  Asked in 18 Companies  basic  frequent | ||||
 Try 1 Question(s) Test | ||||
 Related Questions | ||||
 Difference between == and .equals() ? | ||||
| Why is String immutable in Java ? | ||||
| Explain the scenerios to choose between String , StringBuilder and StringBuffer ? or What is the difference between String , StringBuilder and StringBuffer ? | ||||
| Why Char array is preferred over String for storing password? | ||||
| What are different ways to create String Object? Explain. | ||||
| What is a String Pool ? | ||||
| How does making string as immutable helps with securing information ? How does String Pool pose a security threat ? | ||||
| How is string object immutable if we can concat a string to it ? | ||||
| What is StringJoiner ? | ||||
| Which of the following is false about main method ? a. It should be declared public and static b. it should have only 1 argument of type String array c. We can override main method d. We can overload main method | ||||
| Very frequently asked in phone and walk in interviews. | ||||
| ||||
| Ans. An interface without any method declaration is called as marker interface. there are 3 in-built interfaces in JVM i.e. serializable, clonable, remote | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java oops interfaces marker interface serializable clonable Asked in 21 Companies intermediate frequent | ||||
| Try 1 Question(s) Test | ||||
| Related Questions | ||||
| Difference between serializable and externalizable interface ? | ||||
| How Marker interfaces works internally ? | ||||
| Is runnable a Marker interface ? | ||||
| Whats the purpose of marker interfaces ? | ||||
| What is a cloneable interface and what all methods does it contain? | ||||
| What is a delete marker wrt to S3 objects ? | ||||
