Interview Questions

Q:

What is default constructor?

Answer


A default constructor is a constructor that either has no parameters, or if it has parameters, all the parameters have default values.

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Subject: C++

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Q:

What is inheritance?

Answer

Inheritance is the ability to create new classes based on existing classes. It is useful to reuse existing code.

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Q:

List the advantages of inheritance

Answer

- Inheritence permits code reusability. 


- Reusability saves time in program development. 


- It encourages the reuse of proven and debugged high-quality software which reduces the problems after a system becomes functional.

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Subject: C++

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Q:

How can visual basic be used for server side scripting?

Answer

Visual basic can be used for server side scripting. A component designed with Visual basic will not have any user interface instead provides the functionality of Active X to other programs via COM. This form of technique allows server side functionality and add in module.

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Q:

In HTML 5 we do not need DTD why?

Answer

HTML 5 does not use SGML or XHTML it’s completely a new thing so you do not need to refer DTD. For HTML 5 you just need to put the below doctype code which makes the browser identify that this is a HTML 5 document.

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Q:

What is the difference between the INTO and the SET option in the EXEC CICS RECEIVE MAP command?

Answer

The INTO option moves the information in the TIOA into the reserved specified area, while the SET option simply returns the address of the TIOA to the specified BLL cell or address of a linkage-section.


 

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Q:

Explain some of the commonly used Predefined PL/SQL Exceptions.

Answer

1)Divide by zero        – This is raised when any number is attempted to divide by zero.


2)TOO MANY ROWS   - A SELECT INTO statement returns more than one row.


3)CASE_NOT_FOUND - No choice in the WHEN clause of a case statement is selected.


4)LOGIN_DENIED      - An attempt to login with an invalid username or password.


5)PROGRAM_ERROR  - An internal PL/SQL problem.

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Subject: Oracle

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Q:

What is Constructors and Destructors?

Answer

CONSTRUCTOR : PHP allows developers to declare constructor methods for classes. Classes which have a constructor method call this method on each newly-created object, so it is suitable for any initialization that the object may need before it is used.

DESTRUCTORS : PHP 5 introduces a destructor concept similar to that of other object-oriented languages, such as C++. The destructor method will be called as soon as all references to a particular object are removed or when the object is explicitly destroyed or in any order in shutdown sequence.

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Subject: PHP

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