Database [3i Infotech Placement]: Sample Questions 252 - 253 of 294

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Question 252

Database
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Write in Short

Short Answer▾

What is DML Compiler?

Explanation

Define DML Compiler

DML Compiler:

  • Translates DML statements in a query language within low level instructions understandable through the query evaluation engine.
  • Attempts to transforms users request within an equivalent and well-organized from for executing the query understandable through Data Manager, Interprets DDL statements and records them within a set of tables containing Meta data in a form that can be used through other elements of a DBMS.

Question 253

Database

Question

MCQ▾

What is the difference between a LIST BOX and COMBO BOX?

Choices

Choice (4)

a.

In the list box, the user is restricted to selecting a value from a list but in a combo box the user can type in a value which is not in the list

b.

In a combo box, the user is restricted to selecting a value from a list but in a list box the user can type in a value which is not in the list

c.

A list box is a data entry area while a combo box can be used only for control purposes

d.

Question does not provide sufficient data or is vague

Answer

a.

Explanation

Difference between a LIST BOX and COMBO BOX
LIST BOXCOMBO BOX
Selects multiple itemsCan select only one item
Displays a list of item to userDisplays a drop-down list of items.
Cannot add information at run timeAdd information at run time
Check-box used within list boxCannot use checkbox with in combo box

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