Interview Question and Answers | Search Coding Interview Questions

Interview Questions and Answers - Order By Newest

Q2001. If we have to specify a collection of a particular information like List of addresses, How can we represent that in a JSON ?

JSON

^{This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve json}

Q2002. Which type of testing involves use of mocking frameworks ?

Testing

Ans. Unit Testing

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve}

Q2003. Can and Should we mock calls in integration tests ?

Testing

^{This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve}

Q2004. What features would you like to see in Java 10 ?

Core Java

^{This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java10 java 10}

Q2005. Can we instantiate the object of derived class if parent constructor is private ?

Core Java

Ans. No

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve constructor private constructor}

Q2006. How do you design microservices?

Design

^{This question was recently asked at 'Citigroup Bank,Sofi'.This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve microservices Asked in 2 Companies}

Q2007. Can an enum extend another enum ?

Core Java

Ans. No

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve enum}

Q2008. Can we have a sub enum within an enum ?

Core Java

Ans. Yes

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve enum enum within enum}

Q2009. Write a SQL to remove records with a duplicate field in a Table ?

Database

^{This question was recently asked at 'Sofi'.This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve sql Asked in 1 Companies}

Q2010. How can we make sure that we don't receive duplicate messages from the Kafka Topic ?

Apache Kafka

^{This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve kafka}

Q2011. If a Map needs to be accessed simultaneously by multiple threads, which collection class should be used ?

Core Java

Ans. ConcurrentHashMap

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve map concurrenthashmap multithreading}

Q2012. Given a collection of Employee objects, how can we get the customers with name starting with 'A' using lambda expression.

Core Java

Ans. List emp = Arrays.asList("American", "Indian", "Finn");
emp.stream().filter(em -> em.startsWith("A")).forEach(System.out.println);

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java8 java 8 lambda Asked in 1 Companies}

Q2013. What is the difference between stream and parallel stream ?

Core Java

Ans. streams are used for sequential processing of data and parallel streams are used for parallel processing of data (only if the underlying processor is multicore).

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve stream vs parallel stream stream parallel stream Asked in 1 Companies}

Q2014. Difference between stateless and stateful rest services ?

Rest

^{This question was recently asked at 'Sofi'.This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve rest services stateful rest service stateless rest service Asked in 1 Companies}

Q2015. How can we makes sure that message has been consumed properly from Kafka ?

Apache Kafka

Ans. We can have a mechanism to send the conformation back to Kafka so that Kafka can do offset only after receiving the confirmation.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve apache kafka kafka kafka consumer}

Q2016. What are the advantage of Abstract classes over interfaces with respect to Java 7 ? and What changed in Java 8 to help facilitate that in Java 8 ?

Core Java

Ans. Abstract Classes provide default implementations of methods that are inherited by the classes that extend them, which was not the case for Interfaces. This changed in Java 8, where default implementations are provided for methods.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve abstract classes interfaces default method Asked in 1 Companies expert}

Q2017. Explain Hibernate Validation ?

Hibernate

^{This question was recently asked at 'Sofi'.This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve hibernate hibernate validation Asked in 1 Companies}

Q2018. Which validation frameworks have you worked on ?

Frameworks

^{This question was recently asked at 'Sofi'.This question is still unanswered. Can you please provide an answer.}

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve validation frameworks Asked in 1 Companies}

Q2019. Can we mock static methods ?

Testing

Ans. Yes we can use PowerMock. With Mockito , we cannot mock static methods.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve mocking fraeworks mocking static methods mockito}

Q2020. Kafka has a deliver atleast once default Policy, What are the other policies that can be configured with Kafka ?

Apache Kafka

Ans. Exactly once and At Max Once

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve kafka}

Q2021. Is Cassandra read optimized or Write optimized ?

Cassandra

Ans. Read optimized

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve cassandra Asked in 1 Companies}

Q2022. How Cassandra provides better Read performance than Oracle Indices ?

Database

Ans. Cassandra uses Hash Search which provides a look time of O(1) whereas Oracle Indices uses Binary Search that provide a lookup time of O(Log n).

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve cassandra hash search hash search vs binary search}

Q2023. How different is the Search algorithm when we query Cassandra Tables and When we query Oracle Tables ?

Cassandra

Ans. Relational Database uses linear search if we don't query using indices. Performance for linear search is O(n). If indices have been used , relational database uses binary search. Performance for binary search is O(Log n).

Casandra uses hash search. Performance for Hash Search is O(1).

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve cassandra vs oracle nosql vs relational search algorithm}

Q2024. Can we query Cassandra Tables without specifying the partition id in the where clause ?

Cassandra

Ans. No.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve cassandra}

Q2025. What are the restrictions on querying Cassandra Tables ?

Cassandra

Ans. Cassandra Tables can only be queried using the partition key and then cluster keys, so all queries should have partition key for sure.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve cassandra Asked in 1 Companies}

Q2026. Difference between Normalization and Denormalization ?

Database

Ans. Normalization is the process of splitting one Table into multiple so as to avoid Data duplication whereas Denormalization is the process of reducing Tables that creates data duplication but would remove joins in the queries.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve normalization denormalization normaization vs denormalization Asked in 1 Companies}

Q2027. Which of the two Normalization / Denormalization facilitate better performance ? Which of the two facilitate better space management ?

Database

Ans. DeNormalization facilitate better performance. Normalization remove data duplication and hence facilitate better database space management.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve normalization denormalization normalization vs denormalization}

Q2028. Which of the following databases - Cassandra / Oracle - provides more flexibility about querying the database ?

Database

Ans. Oracle as it is not modeled for a particular query or set of queries.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve Cassandra Nosql database nosql vs relational database}

Q2029. What could be the driving force to have dependencies injected through class than through config file while using IOC or Dependency Injection ?

Design

Ans. Unit Testing

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve dependency injection inversion of control}

Q2030. Which is the best NoSql Database for Performance ?

NoSql

Ans. Possible Answer - doument base - monogodb

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve Nosql Database}

Search Interview Questions

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.