Technology Questions

Q:

Why is code optimization important?

Answer

Optimized code tends to run faster and make more efficient use of the system’s resources. Optimized codes are also less susceptible to errors and take lesser space in memory and in file size.

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Q:

What is the basic difference between ASP and ASP.NET?

Answer

The basic difference between ASP and ASP.NET is that ASP is interpreted; whereas, ASP.NET is compiled. This implies that since ASP uses VBScript; therefore, when an ASP page is executed, it is interpreted. On the other hand, ASP.NET uses .NET languages, such as C# and VB.NET, which are compiled to Microsoft Intermediate Language (MSIL).

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Subject: .NET

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Q:

What is the primary function of the Web browsers?

Answer

- Web browser functions are to provide the resources or information to the user when asked by them. 


- It processes the user inputs in the form of URL like https://www.google.com in the browser and allows the access to that page. 


- URL is used to identify the resources and fetch them from the server and displays it to the client. 


- It allows the user to interact with the web pages and dynamic content like surveys, forms, etc. 


- It also allows the user to navigate through the complete web page and see its source code in the HTML format. 


- It provides security to the data and the resources that are available on the web that is by using the secure methods.

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Subject: Web Technology

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Q:

What is MIME?

Answer

MIME - Multi-purpose Internet Mail Extensions. 


MIME types represents a standard way of classifying file types over Internet. 


Web servers and browsers have a list of MIME types, which facilitates files transfer of the same type in the same way, irrespective of operating system they are working in.


A MIME type has two parts: a type and a subtype. They are separated by a slash (/). 


MIME type for Microsoft Word files is application and the subtype is msword, i.e. application/msword.

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Subject: PHP

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Q:

What are the advantages and disadvantages of 3G?

Answer

Advantages of 3G:

- Overcrowding is relieved in existing systems with radio spectrum
- Bandwidth, security and reliability are more
- Provides interoperability among service providers
- Availability of fixed and variable rates
- Support to devices with backward compatibility with existing networks
- Always online devices – 3G uses IP connectivity which is packet based
- Rich multi media services are available

Disadvantages of 3G:

- The cost of cellular infrastructure , upgrading base stations is very high
- Needs different handsets.
- Roaming and data/voice work together has not yet been implemented
- Power consumption is high
- Requires closer base stations and are expensive
- Spectrum-license costs, network deployment costs and handset subsidies subscribers are tremendous.

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Q:

What is a Session?

Answer

A session is a logical object created by the PHP engine to allow you to preserve data across subsequent HTTP requests. Sessions are commonly used to store temporary data to allow multiple PHP pages to offer a complete functional transaction for the same visitor.

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Subject: PHP

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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:

How does fault tolerance work in mapreduce?

Answer

In a mapreduce job the master pings each worker periodically. In case a worker does not respond to that system then the system is marked as failed. Even completed tasks are rescheduled because the output was stored in a in a local disk of a worker which failed. Hence mapreduce is able to handle large-scale failures easily by simply restarting a task. The master node always saves itself at checkpoints and in case of any failure it simply restarts from that checkpoint.

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Subject: Cloud Computing

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