Interview Questions

Q:

What is the SimpleTimeZone class?

Answer

SimpleTimeZone is a concrete subclass of TimeZone class. The TimeZone class represents a time zone, that is to be used with Gregorian calendar.


The SimpleTimeZone is created by using the base time zone offset from GMT time zone ID and rules, for starting and ending the time of daylight.

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Subject: Java

0 2299
Q:

What is the self-referencing constraint?

Answer

A31. The self-referencing constraint limits in a single table the changes to a primary key that the related foreign key defines. The foreign key in a self referencing table must specify the DELETE CASCADE rule.

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Q:

What are Native methods in Java?

Answer

Java applications can call code written in C, C++, or assembler. This is sometimes done for performance and sometimes to access the underlying host operating system or GUI API using the JNI.


 


The steps for doing that are:


First write the Java code and compile it


Then create a C header file


Create C stubs file


Write the C code


Create shared code library (or DLL)


Run application

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Subject: Java

0 2298
Q:

Describe the situations in which AJAX should not be used.

Answer

You should not use AJAX if:



             =>  You want the page to show in a search engine, such as Google, because WebCrawler does not execute JavaScript code.

             =>  The browser does not support JavaScript.

             =>  You want to create a secure application.

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Subject: .NET

0 2298
Q:

As a wholesaler what are the problems you would face in ensuring the commitment to your retail suppliers?

Answer

As a wholesaler, applicant should say that he/she would face production problem, growing consumption, not concentrating on important market segment, scale of operations not being proper, delivery to different stores and having some issues with suppliers and not a good relationship with suppliers. I would face these problems in reaching the target commitment to suppliers as a wholesaler.

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Subject: Retail

1 2297
Q:

Define PL/SQL. Explain its purpose

Answer

PL/SQL is Procedural Language SQL that is an extension of SQL that results in a more structural language composed of blocks. It is mainly used in writing applications that needs to be structured and has error handling.

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Subject: Oracle

0 2297
Q:

What is the difference between a primary key and a unique key?

Answer

By default, primary key creates a clustered index on the column, whereas a unique key creates a non clustered index by default.

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Subject: SQL

0 2297
Q:

Are arrays primitive data types?

Answer In Java, Arrays are objects.
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Subject: Java

0 2296