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.
1) Local Revert: It will delete all changes from files which you made after updates and before commit.
2) Repo Revert: Upload the changes to previous Repo.
Help us improve. Please let us know the company, where you were asked this question :
Q1026. If we have more threads than partitions in a kafka consumer, How can we model it efficiently ?
Ans. We will have to use multiple consumer groups in that case as threads will remain idle if we use single consumer group. A more sophisticated algorithm could be required with multiple groups if we have to ensure the order of consumption.
Help us improve. Please let us know the company, where you were asked this question :
Q1028. Can a lock be acquired on a class? How is it different than the object level lock ?
Ans. Yes, a lock can be acquired on the class. Class level lock is applicable on the whole class and hence on all objects of the class whereas the object level lock is applicable on the respective object.
Help us improve. Please let us know the company, where you were asked this question :
Ans. Associativity determines whether an expression is evaluated left-right or right-left. When an expression has two operators with the same precedence, the expression is evaluated according to its associativity.
Help us improve. Please let us know the company, where you were asked this question :
Q1037. Does compiler treats it differently if we don't prefix this to the member element and its implicit as its the only variable available with that name ?
Ans. It makes no difference whether we add this to the variable or not. The only use of this is in the cases where there are multiple variables with the same name and we want to distinguish between the member variable and local variable. In case this is not added ,this is automatically added by the compiler in the byte code.
Help us improve. Please let us know the company, where you were asked this question :
Ans. Fail fast systems are intolerant systems that fails at the first instance of smelling any problem. The objective here is to break the system instead of continuing with the possibly flawed processing. Example could be breaking the processing upon an exception.
Help us improve. Please let us know the company, where you were asked this question :
Ans. Hadoop is an open source framework , written in java by apche software foundation. This framework is used to write applications to process vast amount of data. Processing happens in parallel on large clusters which could have 1000 of computers. It processes data in a very reliable and fault tolerant manner.
Help us improve. Please let us know the company, where you were asked this question :
Ans. One common usage is predictive analytic using huge current or past data. For example - Using recent medical data ( diagnosis and procedure ), one can identify the pattern of diseases or the procedures that has to eventually applied upon certain diagnosis. This analysis might help in predicting the diseases that might occur to a patient.
the other usage could be to identify the future spending patterns of the population by analyzing the past and current habits.
Help us improve. Please let us know the company, where you were asked this question :
Ans. Combiners are used to increase the efficiency of a Map Reduce program. They are used to aggregate intermediate map output locally on individual mapper outputs. Combiners can help you reduce the amount of data that needs to be transferred across to the reducers.
Help us improve. Please let us know the company, where you were asked this question :
Ans. <a href="http://www.programcreek.com/2009/02/diagram-for-hierarchy-of-exception-classes/" rel="nofollow">http://www.programcreek.com/2009/02/diagram-for-hierarchy-of-exception-classes/</a>
Help us improve. Please let us know the company, where you were asked this question :
Ans. Stored procedures are a batch of SQL statements along with programming constructs ( if else, loops etc ) and stored as a single program that can be called by different clients and hence reused.
Help us improve. Please let us know the company, where you were asked this question :
More than 3000 questions in repository.
Discuss 
jsp jsp scriptlet scriptlet
Asked in 2 Companies
Frequently asked.
Basic 
frequent
Try 1 Question(s) Test
Interface can only have ...
