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Q3151. What kind of deployable is created for the angular project ?

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Q3152. What would you do if your rest services aren't responding fast enough ?

Rest

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Q3153. If you see a terrible code, Would you rewrite it. If yes , Why ?

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Q3154. If you are given a stack trace , what would you look for ?

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Q3155. Write a program to make a triangle of stars.

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Q3156. Explain SOLID principles.

Design

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Q3157. Explain the lifecycle methods of a Dojo widget.

Dojo

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Q3158. What are the ways we can get over XSS or cross site scripting vulnerability ?

Security

Ans. The counter measures of XSS are input validation and implementing a CSP (Content Security Policy).

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Q3159. How can an XSS attack harm a system ?

Security

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Q3160. Write a code to detect the longest palindromic substring

Core Java

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Q3161. What is headless mode in Java ? Why is it used ?

Core Java

Ans. It’s a mode that can be used for creating Back end application without the front end UI.

The advantage is that it reduces the number of packages that needs to be loaded ( by ignoring ui packages )

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Q3162. What are the distinguished qualities in Java that no other language possess ?

Core Java

Ans. Java is widely adopted as an enterprise standard technology across business domains and technical domains ( Web , Desktop , mobile , data science etc ) and has a vast ecosystem of frameworks and libraries.

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Q3163. What is ServerSocket in Java ?

Core Java

Ans. This class implements server sockets. A server socket waits for requests to come in over the network. It performs some operation based on that request, and then possibly returns a result to the requester.

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Q3164. Can anonymous class implement interface and extend a class

Core Java

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Q3165. What are the types of clouds in cloud computing ?

Cloud Computing

Ans. Private, Public, Hybrid, Community

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Q3166. Explain switch and router

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Q3167. How to get collections from a Stream

Core Java

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Q3168. Class and Object methods.

Core Java

Ans. class:- A class describe the contents of an object, an it describe the detail of data field called instance variable and defines the operations called method.

Object:-An object is an element of a class. Object have the behaviors of their class.

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Q3169. Difference between merge and update in hibernate

Hibernate

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Q3170. What is the programming language used to build Jenkins?

Jenkins

Ans. There is a diverse set of programming languages used in Jenkins, including but not limited to: Java, JavaScript, Groovy, Golang, Ruby, Shell scripts

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Q3171. how to switch to the parent webpage?

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Q3172. What can be done to protect the application from DDOS attack ?

Security

Ans. We can set the max number of requests from a given IP or an IP range

We can set the time out so that a single request cannot hold on to resources for too long.

We can identify patterns ( like too many requests from single IP for single page ) and then block such requests.

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Q3173. What is your opinion about caching ?

Design

Ans. Caching is a mechanism that provides faster access but at the cost of additional space. Caching is good if we need faster access and if it takes extensive processing to come to a value which doesn't gets changed frequently.

Caching could be an overhead if we don't need fast access or if the processed value changes too frequently.

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Q3174. What are Hooks in programming and Design Patterns ?

Design

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Q3175. What is SNMP ?

Networking

Ans. SNMP or Simple Network Management protocol is an application layer protocol for exchanging management information between network devices.

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Q3176. what is dynamic method dispatch

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Q3177. what is green threads

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Q3178. What is java machine control

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Q3179. What is a composite primary key and foreign key ?

Database

Ans. The combination of values from multiple columns in the composite primary key must be unique for each row in the table.
A foreign key, on the other hand, is a field or set of fields in one table that refers to the primary key in another table. It establishes a relationship between two tables based on the values of the foreign key and the primary key.

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Q3180. What is ado.net ?

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