Interview Questions

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:

How important does accounts receivable useful for small business and why?

Answer

 Accounts receivables help small businesses by providing quick-time period liquidity. Additionally continued sales on credit provide the  much-needed continuity for small companies.

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Q:

What type of Joins have you used?

Answer

The knowledge of Joins is a MUST for every interviewee. Most SQL programmers have used inner join and  outer join[left/right]; but the catch point here is to also mention cross join and self-join.


 

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Subject: SQL

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Q:

What is the purpose of declaring a variable as final?

Answer A final variable's value can't be changed. final variables should be initialized before using them.
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Subject: Java

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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:

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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Q:

How can you send an email message from an ASP.NET Web page?

Answer

You can use the System.Net.Mail.MailMessage and the System.Net.Mail.SmtpMail classes to send an email in your Web pages. In order to send an email through your mail server, you need to create an object of the SmtpClient class and set the server name, port, and credentials.

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Subject: .NET

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Q:

Explain the difference among the EXEC LINK, EXEC XCTL and Cobol II static call statements in CICS?

Answer

- Use a COBOL II CALL statement to invoke a subprogram. This method is transparent to CICS, which sees only the one load module. 


- EXEC LINK is similar to a call; it invokes a separate CICS program and ends with a RETURN to the invoking program


- EXEC XCTL which transfers control to another CICS program and does not get control 


back. 


COBOL II allows for static calls which are more efficient than the LINK instruction which establishes a new run-unit. 

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