Languages [3i Infotech Placement]: Sample Questions 288 - 289 of 546

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Question 288

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Write in Short

Short Answer▾

Difference between pass by reference and pass by value.

Explanation

Difference between Pass by Reference and Pass by Value
Pass by valuePass by reference
Passes an argument by value.Passes an argument by reference.
Specified the ByVal keyword.Specified the ByRef keyword.
The procedure code does not access the underlying element in the calling code.The procedure code gives a direct reference to the programming element in the calling code.
We are sending a copy of the data.We are passing the memory address of the data that I stored.
Changes do not affect the actual value.Changes to the value affect the original data.

Question 289

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Describe in Detail

Essay▾

RDBMS file system can be defined as

Explanation

Understanding of RDBMS
  • In general a Database Management System (DMS) is a collection files and programs that allow users to access and modify data- providing convenient and efficient way to store, retrieve and modify information.
  • Application programs request DBMS to retrieve, modify, insert, delete data providing abstraction between the application programs and the file system.
  • Users interact with DBMS using structured query language.
  • Relational database management system is based on a relational database- RDBMS refers of the database program itself.
  • It is software that executes queries on the data, including adding, updating, and searching for values in a relational database.
  • RDMS also provided a visual representation of the data.
  • Relational database is one where data is organized in table.

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