Interview Questions

Q:

What is the use of eucalyptus in cloud computing environment?

Answer

Eucalyptus stands for “Elastic Utility Computing Architecture for Linking Your Programs to Useful Systems” and provides an open source software infrastructure to implement clusters in cloud computing platform. It is used to build private, public and hybrid clouds. It can also produce your own datacenter into a private cloud and allow you to extend the functionality to many other organizations. Eucalyptus provides APIs to be used with the web services to cope up with the demand of resources used in the private clouds.

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Subject: Cloud Computing

1 3191
Q:

Name and explain the type of locks?

Answer

There are three types of lock, namely:


Shared – This type of lock permits two or more programs to read from the locked space but does not allow them to change it.


Update – This lock is more lenient. It permits the program to read and change the locked space.


Exclusive – This lock restricts all users from accessing the locked space.

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Q:

What is the difference between int and int32 ?

Answer

There is no difference between int and int32. System. Int is an alias name for System.Int32 which is a .Net Class.

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Subject: .NET
Job Role: Analyst , IT Trainer

1 3187
Q:

What is Uniform Data Access Integration?

Answer

- UDAI places the data in the source systems.


- A set of views are defined for providing access the unified view to the clients / customers.


- Zero latency of data can be propagated from the source system.


- The generated consolidated data need not require separate storage space.


- Data history and version management is limited and applied only to the similar type of data.


- Accessing to the user data overloads on the source systems.

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Q:

What is the difference between Property Get, Set and Let?

Answer

Set - Value is assigned to ActiveX Object from the form.


Let - Value is retried to ActiveX Object from the form.


Get - Assigns the value of an expression to a variable or property.

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Q:

For printing out strings, there are echo, print and printf. Explain the differences.

Answer - echo is the most primitive of them, and just outputs the contents following the construct to the screen. print is also a construct (so parentheses are optional when calling it), but it returns TRUE on successful output and FALSE if it was unable to print out the string. However, you can pass multiple parameters to echo, like:

and it will output the string "Welcome to TechInterviews!" print does not take multiple parameters. It is also generally argued that echo is faster, but usually the speed advantage is negligible, and might not be there for future versions of PHP. printf is a function, not a construct, and allows such advantages as formatted output, but it’s the slowest way to print out data out of echo, print and printf.
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Subject: PHP

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Q:

What is locking ? what are the advantages of locking?

Answer

Locking is a mechanism to ensure data integrity while allowing maximum concurrent access to data. It is used to implement concurrency control when multiple users access table to manipulate its data at the same time.


Advantages :


- Avoids deadlock conditions


- Avoids clashes in capturing the resources

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Subject: Oracle

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Q:

What is Language Integrated Query (LINQ)?

Answer

LINQ is a programming model that is the composition of general-purpose standard query operators that allow you to work with data, regardless of the data source in any .NET based programming language. It is the name given to a set of technologies based on the integration of query capabilities into any .NET language.

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Subject: .NET

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