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

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Q71. What is a platform ? Is Java a Software or Hardware platforms ?

Ans. Platform is the environment in which a program runs. Java provides a software platform for running JVM based applications and programs.

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Q72. What are the different layers of cloud computing ?

Infrastructure

Ans. Paas - Platform as a service
Iaas - Infrastructure as a service
Saas - Software as a service

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Q73. What are the different ORMs supported by Spring ?

Spring

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Q74. What is ORM or Object Relationship Mapping ?

Database

Ans. ORM is the mapping technique, which maps object with relational data model. As we know that in java we need objects we can not user data in relational(in table form). So ORM is set of guideline which allows us to map relational data model in object form.

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Q75. 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.

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Q76. 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.

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Q77. Can you write the code for implementing the one to many (student -> courses) relationship in hibernate?

Hibernate

Ans. @OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "student_id")
private Set countries;

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Q78. Can you explain software design principles cohesion and coupling with an example?

Design

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Q79. How cloud computing is different than virtualization ?

Server

Ans. A Virtualization is software that virtualizes your hardware into multiple machines while Cloud computing is the combination of multiple hardware devices. In Virtualization, a user gets dedicated hardware while in Cloud computing multiple hardware devices provide one login environment for the user.

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Q80. Describe SQL Joins

Database

Ans. Oracle having following types of joins these are also called 8i joins. There are:

1. Equi (or) Inner join
2. Non Equi join
3.Self join
4.Outer join

Oracle also support the 9i (or) ANSI standard joins.There are:

1.Inner join
2.Left outer join
3.Right outer join
4.Full outer join
5.Natural join

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Q81. Is java fully platform independent ?

Core Java

Ans. yes, Java is a class-based and object-oriented programming language. It is a platform-independent language i.e. the compiled code can be run on any java supporting platform. It runs on the logic of “Write once, run anywhere”.

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Q82. Which s/w is used for adhar card verification for amount transfer?

Ans. The Aadhaar enabled Payment System or AePS

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Q83. What is elasticity in relation to Cloud infrastructure ?

Cloud Computing

Ans. The power to scale computing resources up and down easily with minimal friction

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Q84. Pascal Triangle Program

Ans. package snippet;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Pascal {
   public static void main(String[] args) {

      System.out.println(generatePascalTriangle(5));

   }

   static Map> generatePascalTriangle(int size) {
      Map> triangle = new HashMap<>();

      triangle.put(0, Arrays.asList(1));
      triangle.put(1, Arrays.asList(1, 1));

      for (int i = 2; i <= size; i ) {
         List coeffListForI = new ArrayList<>();
         List coeffListForI_1 = triangle.get(i - 1);
         coeffListForI.add(1);
         for (int j = 0; j <= coeffListForI_1.size() - 2; j ) {
            coeffListForI.add(coeffListForI_1.get(j) coeffListForI_1.get(j 1));
         }
         coeffListForI.add(1);
         triangle.put(i, coeffListForI);
      }

      return triangle;
   }
}

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Q85. What is cluster ?

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Q86. What is life cycle of cloud deployment process ?

Cloud Computing

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Q87. What are the types of clouds in cloud computing ?

Cloud Computing

Ans. Private, Public, Hybrid, Community

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Q88. Differentiate osi and tcp/ip models and describe them

Networking

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Q89. what are system calls

Operating System

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Q90. What is size of structure in c ?

C++

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Q91. What are reference variables in c

C++

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Q92. Explain memory allocation and deallocation.

C++

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Q93. Have you ever worked on Google Cloud Platform ?

Google Cloud Platform

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Q94. Can you explain integration between Spring and Hibernate ?

Hibernate

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Q95. Explain Virtual machines in Google Cloud Platform.

Google Cloud Platform (GCP)

Ans. Virtual machines are IAAS in GCP which can called Compute Engine

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Q96. Explain Identity management in GCP ?

Google Cloud Platform (GCP)

Ans. IAM is used to define the level of access to GCP services

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Q97. How does cloud computing helps saves cost ?

Cloud Computing

Ans. Cloud computing helps saving overall cost for infrastructure and service usage through following -

1. On demand Services and elasticity - You only pay for what you use. Less Ideal time.

2. Resource Pooling

3. Self Service - Less involvement of human resources

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Q98. What are the different types of Services GCP provides ?

Google Cloud Platform (GCP)

Ans. Compute
Network
Storage
Big Data
Machine Learning

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Q99. What is the difference between Billing Alerts and Budget Quotas in GCP ?

Google Cloud Platform (GCP)

Ans. Alerts only let customer knows of any excessive usage whereas Quota restricts the usage beyond a certain point.

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Q100. How Resource Pooling helps saving cost ?

Cloud Computing

Ans. With resource pooling and Pay as per use , Bigger companies like Google and Amazon can buy Large physical hardware and employ economy of scale and hence resulting in cost saving for customers.

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