Interview Questions and Answers for 'C' | Search Interview Question

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Q2701. Which of the following is not the Dameon process that runs on a hadoop cluster ?

a. JobTracker
b. DataNode
c. TaskTracker
d. TaskNode

Ans. TaskNode

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Q2702. What is an instance variable?

a. An instance or object of an class
b. The field of an object
c. Any variable of a class
d. None of the above

Ans. The field of an object

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Q2703. Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ?

a. Serialization
b. Runtime Polymorphism
c. Lazy Loading
d. Memory

Ans. Runtime Polymorphism

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Q2704. Which of the following combination of keywords is illegal in Java ?

a. static and transient
b. transient and final
c. static and synchronized
d. abstract and final

Core Java

Ans. abstract and final

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Q2705. Which of the following Java feature promotes Code Re usability ?

a. Abstraction
b. Encapsulation
c. Inheritance
d. Polymorphism

Core Java

Ans. Inheritance

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Q2706. Which of the following Java feature promotes access protection or Hiding ?

a. Inheritance
b. Encapsulation
c. Abstraction
d. Composition

Core Java

Ans. Encapsulation

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Rarely asked as it was introduced with Java 8.

Q2707. Which keyword specify that a variable is effectively final ? a. final b. No Keyword c. Both of the above d. None of the above

Core Java

Ans. No Keyword

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Q2708. What is the input to the Reduce function ?

a. One Key and One Value
b. Multiple Keys and Multiple associated Values
c. Multiple Keys and One associated values with each
d. One key and associated values.

Ans. One key and associated values.

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Q2709. Which of the following is the implementation language for Map Reduce Framework ?

a. Big Data
b. Hadoop
c. Java
d. C++

Ans. Java

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Rarely asked as it was introduced with Java 8.

Q2710. Which of the following has been introduced with Java 8 ? a. StringBuffer b. StringBuilder c. StringFilter d. StringJoiner

Core Java

Ans. StringJoiner

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Q2711. enums are intrinsically ..

a. private
b. public
c. static
d. final

Core Java

Ans. static

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Q2712. Enums cannot be declared ..

a. private
b. public
c. static
d. final

Core Java

Ans. final

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Q2713. Which class provides the enumerated value for Bean Scope ?

a. BeanDefinition
b. ConfigurableBeanFactory
c. WebApplicationContext
d. All of the Above

Spring

Ans. All of the Above

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Q2714. Which of the following Interface needs to be implemented by any object that wishes to be notified of the ApplicationContext that it runs in ?

a. ApplicationContextAware
b. ApplicationContextUtils
c. ApplicationContext
d. Aware

Spring

Ans. ApplicationContextAware

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Q2715. In Spring , Which class handles the Http requests for RESTful web services ?

a. Service
b. Model
c. Controller
d. Util

Spring

Ans. Controller

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Q2716. Which is the Parent Class of CertStoreParameters class?

Ans. Clonable

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Q2717. What is RI or Reference Implementation ?

Ans. RI or Reference Implementation is a sample implementation provided for the API's / Specs, usually by their developers. This is usually a part of API documentation.

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Q2718. Explain Application / Server architecture being used in your project ?

or

Explain your project architecture ?

Ans. We are using cluster of Web servers and Application servers. Load Balancer is used to manage the load between them. Down the layer we have middleware server and then DB server to access database.

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Q2719. How do you monitor the server resources if inadvertently high traffic is reported ?

Ans. We use SAR command for that purpose. We also have GUI system monitoring tool to keep real time check of requests, load and memory usage.

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Q2720. Have you ever faced any problem due to caching?

Ans. Yes , sometime we receive issues related to outdated pages being rendered to the user. In those cases we clear the cache and then try to investigate the reason for that. Sometime the issue is due to comparatively high refresh interval. In those cases we reduce the cache refresh interval.

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Q2721. What is GregorianCalendar class ?

Ans. This class provides support for traditional Western calendars.

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Q2722. What is a ResourceBundle Class ?

Ans. This class is used to store locale specific resources that can be loaded by a program to tailor it to the particular locale.

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Q2723. Difference between prefix and postfix increment operator ?

Ans. Prefix operator performs the increment and then assignment whereas its inverse for postfix operator.

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Q2724. Difference between parameters and arguments ?

Core Java

Ans. Parameters are the variables that the method is expected to receive along with the method call. Arguments are the values which are passed on while calling the methods.

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Q2725. Print natural numbers sequentially with two threads.

Core Java

Ans. http://stackoverflow.com/questions/18799591/print-natural-sequence-with-help-of-2-threads1-is-printing-even-and-2nd-is-pri

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Q2726. Which java frameworks have you used ?

General

Ans. I have primarily worked on Web applications and hence worked on Struts , Spring , Hibernate, JSF ( Java Server Faces ) , Velocity etc.

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Almost sure to be asked in every company using any Dependency Injection framework ( Spring, Guice etc )

Q2727. What is Dependency Injection or IOC ( Inversion of Control ) ?

Design

Ans. It is a Design Pattern that facilitates loose coupling by sending the dependency information ( object references of dependent object ) while building the state of the object. Objects are designed in a manner where they receive instances of the objects from other pieces of code, instead of constructing them internally and hence provide better flexibility.

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Q2728. Explain the challenging problems you faced recently and how you overcame it ?

General

Ans. [Open Ended Answer]

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Q2729. Explain TDD or Test Driven Design ?

Design

Ans. TDD is a development process that involves short iterations: first an automated test case is written. Then, the code is written to pass that test, and finally one refactors the new code to acceptable standards.

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Frequently asked in face to face interviews.

Q2730. Write a program to print fibonacci series.

Core Java

Ans. int count = 15;
int[] fibonacci = new int[count];
fibonacci[0] = 0;
fibonacci[1] = 1;
for(int x=2; x < count; x++){
fibonacci[x] = fibonacci[x-1] + fibonacci[x-2];
}

for(int x=0; x< count; x++){
System.out.print(fibonacci[x] + " ");
}

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