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Q151. What is the difference between Co Location, Virtualization and Serverless ?

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Q152. 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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Q153. What is the use of defining equals , compareTo and hashcode methods in a class ? Where are they used ?

Core Java

Ans. equals, compareTo and hashcode are of use when the objects are used within collections.

Equals helps with collections that helps maintaining only unique objects ( like Set )

compare and compareTo helps with collections that helps maintaining objects in order ( TreeSet, TreeMap etc )

hascode helps with collections that facilitates hash searching ( like hashSet, hashMap etc )

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Q154. Can we check two html radio buttons together ?

Html

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Q155. Difference between Span and Div ?

Html

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Q156. Develop an address form in React js.

React JS

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Q157. prototypal inheritance in Javascript

JavaScript

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Q158. Create a component and sort the data to show specific information.

React JS

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Q159. Have you had to work with memory leak problems in javascript ?

JavaScript

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Q160. Write a method to track every click on a page.

JavaScript

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Q161. What is the difference between inheritance in PHP vs. Javascript?

JavaScript

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Q162. Why would you use XML over JSON when using ajax ?

JSON

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Q163. 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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Q164. 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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Q165. Can you explain integration between Spring and Hibernate ?

Hibernate

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Q166. What is the maximum limit of domain supported by Route 53 ?

Amazon Web Service (AWS)

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Q167. How can we create custom AMI ?

Amazon Web Service (AWS)

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Q168. Write a Program to draw a fish ?

Core Java

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Q169. Should we do anything to avoid memory leaks in Java ?

Core Java

Ans. Java has a intrinsic way of checking leaks and reclaiming memory called garbage collection. Moreover Java doesn't support pointer arithmetics , so there is very low comparative chance of memory leaks, compared to C,C++

Though there may be tools that may audit code to make sure that we are not leaving much for the garbage collection to work but I have never heard anyone doing anything for memory leaks in Java.

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Q170. Explain Collections in Java

Core Java

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Q171. Is String mutable or immutable in Java ?

Core Java

Ans. String is Immutable because of String Constant Pool.

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Q172. What are different types of Polymorphism in Java ?

Core Java

Ans. run time polymorphism
compile time polymorphism

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Q173. Can we assign the reference to this variable ?

Core Java

Ans. No

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Q174. Have you ever worked on migration from enterprise network infrastruscture to Cloud Infrastructure ? What problems did you face ?

Infrastructure

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Q175. Have you ever worked on Google Cloud Platform ?

Google Cloud Platform

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Q176. differences between drop , delete and truncate

Database

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Q177. Hash map using/without using Java 8

Core Java

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Q178. What is difference between Echo and Print ?

Ans. echo and print statements both are similar there is a slight difference between those both are output statements echo has no return value while print has value 1 echo takes multiple parameters but print takes one argument

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Q179. How do you use cut command in unix ?

Unix

Ans. cut command is used to extract the given number of characters and columns from a file

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Q180. What is Throwable ?

Core Java

Ans. Throwable in java is a class that is the superclass of all exceptions and errors which may occurs in java program.It extends obcect class.

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