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.

Report Error

View answer Workspace Report Error Discuss

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.

Report Error

View answer Workspace Report Error Discuss

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.

Report Error

View answer Workspace Report Error Discuss

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.

Report Error

View answer Workspace Report Error Discuss

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.

Report Error

View answer Workspace Report Error Discuss

Subject: .NET

0 2299
Q:

Which package is imported by default?

Answer java.lang package is imported by default even without a package declaration.
Report Error

View answer Workspace Report Error Discuss

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.

Report Error

View answer Workspace Report Error Discuss

Subject: Oracle

0 2296
Q:

What is Shallow and deep cloning in Java?

Answer

Cloning refers to creating duplicate copies of objects in java.


Shallow Cloning: Shallow cloning is a bitwise copy of an object. New object is created which is an exact copy that of the original one. In case any objects are referring the fields of these objects, just the references are copied.


Deep Cloning: In deep cloning, complete duplicate copy of the original copy is created. Deep cloning creates not only the primitive values of the original objects but also copies all its sub objects as well.


Clonable interface is used to perform cloning in java.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

0 2294