Interview Questions

Q:

How can you avoid callback hells ?

Answer

There are lots of ways to solve the issue of callback hells:


1. Modularization: break callbacks into independent functions
2. Use a control flow library, like async
3. Use generators with Promises
4. Use async/await (note that it is only available in the latest v7 release and not in the LTS version)

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Subject: Java
Job Role: Analyst , IT Trainer

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Q:

What is Thread?

Answer

A Thread is a block of code that can be executed in parallel with another block of code.

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Subject: Java

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Q:

What documents are used for use cases?

Answer

There are 2 documents: 


FRD (functional requirement document) 


SDD (system design document) which can also be called TRS (Technical requirements specifications) 

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Q:

What do you mean by motivation?

Answer

Motivation means to arouse your hidden qualities and use them against something to overcome. As only motivation makes you successful in life, Without motivation one is like without any goal in life. Motivation is the only factor that could even make an adrift person to become successful.

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Subject: Motivation

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Q:

Describe Android Application Architecture.

Answer

Android Application Architecture has the following components:
* Services – like Network Operation
* Intent - To perform inter-communication between activities or services
* Resource Externalization - such as strings and graphics
* Notification signaling users - light, sound, icon, notification, dialog etc.
* Content Providers - They share data between applications

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Q:

What are the three cost factors involves in cloud data center?

Answer

Cloud data center doesn’t require experts to operate it, but it requires skilled people to see the maintenance, maintain the workloads and to keep the track of the traffic. The labor cost is 6% of the total cost to operate the cloud data center. Power distribution and cooling of the datacenter cost 20% of the total cost. Computing cost is at the end and is the highest as it is where lots of resources and installation has to be done. It costs the maximum left percentage.

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Subject: Cloud Computing

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Q:

How to upload files in Amazon S3?

Answer

Amazon S3 provides uploading of large files and retrieve small offsets for end-to-end transfer data rates. The large file gets stored into small files that are smaller in size. Amazon S3 stores multiple of files together in a bundle or in a compressed form, For example in .gzip or .gz format and then convert them into Amazon S3 objects. The files get uploaded on the Amazon server by the use of FTP or another protocol and then retrieved through the HTTP GET request. The request includes the defined parameters like URL, offset (byte-range) and size (length).

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Subject: Cloud Computing

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Q:

In the JCL, how do you define the files referred to in a subroutine ?

Answer

Supply the DD cards just as you would for files referred to in the main program.

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