Database [3i Infotech Placement]: Sample Questions 282 - 283 of 294

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Question 282

Database
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Describe in Detail

Essay▾

What are the unary operations in Relational Algebra?

Explanation

  • Projection: Is used to project required column data from a relation.
Understanding of Projection
  • Selection: Is used to select required tuples of the relations.
Understanding of Selection
  • Join: Concatenation of rows from one relation and related rows from another.

Question 283

Database

Question

MCQ▾

When is a . FMB file extension is created in Forms 4.5?

Choices

Choice (4)

a.

Run form

b.

Executing form

c.

Save form

d.

Generating form

Answer

c.

Explanation

Define Text Files and Documentation
  • FMB file contains binary source code used by oracle forms.
  • Oracle form is a software product for creating screens that interact with an oracle database
  • Saving a form creates a . FMB file extension- associated with oracle forms.
  • FMB is a module, specifically, a forms module binary file, created by forms builder.
  • Forms use oracle as backend database.

How to open a FMB files.

  • To open an FMB file simply double-click it- associated application will open the file.
  • If correct application is not associated with the extension FMB file then this will not open FMB file.
  • FMB file can be opened using Notepad text-editor.

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