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Q61. Can we use interpolation with all data types ?

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Q62. What is interpolation in Angular ?

Angular

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Q63. What is a component decorator ?

Angular

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Q64. What are the different conditions that triggers view update in case of push ChangeDetectionStrategy ?

Angular

Ans. 1. Any change in Input
2. Any even originating from the component or it's child components
3. Explicit trigger

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Q65. Which change detection strategy do you use in your application and Why ?

Angular

Ans. We use ChangeDetectionStrategy.Push

As the application grows bigger , The default change detection strategy could become a performance overhead and hence should be avoided.

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Q66. Difference between ViewChild and ContentChild.

Angular

Ans. Any directive, component, and element which is part of component template is accessed as ViewChild. Whereas, any element or component which is projected inside is accessed as ContentChild.

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Q67. Have you ever faced any problem due to package version incompatibility in angular ? How did you fix it ?

Angular

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Q68. Which file holds the dependent package information ?

Angular

Ans. package.json

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Q69. What are various design frameworks for Banking profile ?

Design

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Q70. What is the main difference between unique key and primary key ?

Database

Ans. Primary key will not accept NULL values whereas Unique key can accept one NULL value.

A table can have only primary key whereas there can be multiple unique key on a table.

A Clustered index automatically created when a primary key is defined whereas Unique key generates the non-clustered index.

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Q71. String processing in Java

Core Java

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Q72. how did you handled your clients requests in your project ?

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Q73. Design Parking Lot.

Design

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Q74. Can we apply strict mode to a function ?

Angular

Ans. Yes

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Q75. what is strict mode in javascript ? How is it used ?

Javascript

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Q76. What is concurrent interface ?

Core Java

Ans. ConcurrentMap is an interface and it is a member of the Java Collections Framework. It represents a Map that is capable of handling concurrent access to it without affecting the consistency of entries in a map. ConcurrentMap interface present in java.util.concurrent package.

HashMap operations are not synchronized, while Hashtable provides synchronization. Though Hashtable is thread-safe, it is not very efficient. To solve this issue, the Java Collections Framework introduced ConcurrentMap in Java 1.5.

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Q77. What are abservables in angular ?

Angular

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Q78. What are the spec.ts files in angular ?

Angular

Ans. The spec files are unit tests for your source files. The convention for Angular applications is to have a .spec.ts file for each .ts file. They are run using the Jasmine javascript test framework through the Karma test runner

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Q79. How dependency injection in angular helps with loose coupling in angular ?

Angular

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Q80. What are the different ways we can specify the selector for the component ?

Angular

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Q81. What is the selector and template in a component ?

Angular

Ans. Selector specifies the name which is to be used to refer to the component whereas template specifies the html that needs to be rendered.

So selector specifies the reference name whereas template specifies the template or html to be rendered.

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Q82. Is it required to tie a component to a module ?

Angular

Ans. Yes, We need to have a component tied to a module for it to work. If we don't want to create a new module , we can just tie it to default "app.module"

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Q83. How to add a component in Angular ?

Angular

Ans. 1. Create a component
2. Register it with a module
3. Add an element in HTML markup

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Q84. What is the need of having multiple modules in angular ?

Angular

Ans. It makes the application more modular and easy to manage.

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Q85. What are the things that an angular component holds ?

Angular

Ans. Data , HTML and Logic

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Q86. What are the building blocks of Angular Apps ?

Angular

Ans. modules, components, templates, metadata, data binding, directives, services, and dependency injection

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Q87. What is the purpose of Spring inheritance ?

Spring

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Q88. What will you do if your build fails and you need to fix it in an hour ?

Build Management

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Q89. Design pattern used in struts.

Struts

Ans. Struts controller uses the Command design pattern and the action classes use the Adapter design pattern. The process() method of the RequestProcessor uses the Template method design pattern.

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Q90. What are the benefits of Java over other Programming Languages ?

Core Java

Ans. 1. JVM that makes it platform independent and facilitates portability.
2. Garbage Collector that protects from Memory Leaks.
3. Only usage of references and not pointer arithmetic and hence protects the application from memory issues like dangling pointers, memory leaks etc.
4. Support for OOPs that makes application development and maintenance easy.
5. Facilitates library development through use of interface / abstract classes.
6. Facilitates creation of scalable applications.
7. Huge repository of libraries and pool of people with java skill.

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