Technical Interview Questions and Answers :: IBM

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  • 1. What is Polymorphism/Late Binding? Explain the different forms of Polymorphism.
  • Answer:

    When an object is sent a message then it does not know itself what type it is, the runtime environment will decide about function calling over an object. This feature of connecting an object with its associated message at runtime is known as Polymorphism or Late binding or Dynamic binding.

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  • 2. What is Normalization?
  • Answer:

    Nnormalization is step by step process of spiliting the bigger table into smaller table without changing any functionality. This wil improve the performance.



    There are some way to normalize table 



    A. 1nf



    B.2nf



    C.3nf



     

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  • 3. Difference in instance and database.
  • Answer:

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    IBM Capgemini 

  • 4. What is database?
  • Answer:

    A database is a logically coherent collection of data with some inherent meaning, representing some aspect of real world and which is designed, built and populated with data for a specific purpose.

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  • 5. What is Normalization? Write different NFs?
  • Answer:

    It is a process of analyzing the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the properties
    > Minimizing redundancy
    > Minimizing insertion, deletion and update anomalies.

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  • 6. What are the layers of the OSI reference model?
  • Answer:

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  • 7. What is Protocol?
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  • 8. What is the importance of the OSI Physical Layer?
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  • 9. How many layers are there under TCP/IP?
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  • 10. Tell me something about your academic project? your role/responsibility.
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