Interview Questions

Q:

What is unwrapping?

Answer

Unwrapping is also called as unpacking or unboxing.


Getting the private data stored in the object by using methods is called unpacking or unwrapping.

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Subject: Java

0 2301
Q:

A table is classified as a parent table and you want to drop and re-create it. How would you do this without affecting the children tables?

Answer

Disable the foreign key constraint to the parent, drop the table, re-create the table, enable the foreign key constraint.

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5 2300
Q:

What do you mean by a tablespace?

Answer

- These are the Logical Storage Units into which a database is divided.
- It is used to group together the related logical structures.

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Subject: Oracle

0 2300
Q:

How does Microsoft classify security threats to its software?

Answer

Microsoft classifies such threats into 4 indicators, which are low, moderate, important, and critical. Such indicators are available as reference under the Microsoft bulletin.

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0 2299
Q:

Explain why workflows are based on Extensible Models.

Answer

Workflows serve the purpose of automating business processes. Now, since each type of business has a wide range of problems; therefore, a workflow platform needs to be extensible. WF provides you with a set of base activities, such as IfElse, Code, and Delay, to build a workflow. You can extend these activities or build new activities to meet your requirements. Besides activities, you can also extend services, such as tracking, management, and persistence, provided by the runtime engine.

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Subject: .NET

0 2298
Q:

Which package is imported by default?

Answer java.lang package is imported by default even without a package declaration.
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Subject: Java

0 2298
Q:

What is a synonym? What are its various types?

Answer

A synonym can be called as an alias for a table, view, sequence or program unit. It is basically of two types:
- Private - Only the owner can access it.
- Public - Can be accessed by any database user.

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Subject: Oracle

0 2296
Q:

If super class ref is pointing sub class object then by using super class ref is it possible to call sub class newly defined method?

Answer

yes if the method is ovreriding method


no if the method is not overriding method

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Subject: Java

143 2294