Interview Questions

Q:

Is there a application program coding difference between local and central version mode in IDMS?

Answer

No. The mode is specified via the SYSCTL DD card in the JCL.

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Q:

What do you mean by multiple inheritance in C++ ?

Answer

Multiple inheritance is a feature in C++ by which one class can be of different types. Say class teaching Assistant is inherited from two classes say teacher and Student.

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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:

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:

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:

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:

My SQL statement SELECT AVG(SALARY) FROM EMP yields inaccurate results. Why?

Answer

Because SALARY is not declared to have NULLs and the employees for whom the salary is not known are also counted.


 

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