3i Infotech Placement: Sample Questions 257 - 257 of 1245
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Question 257
Statement True-False▾
A CONTROL BLOCK can sometimes refer to a BASETABLE?
Choices
Choice (4) | |
---|---|
a. | False |
b. | True |
c. | None of the above |
d. | All of the above |
Answer
a.Explanation
CONTROL BLOCK
- Basically control block is not related to table.
- Item in a control block do not relate to table columns.
- It contain button, text, item, check boxes.
Below Creates a Control Block
- Select Tools ⇾ New Block. Or, in the Object Navigator, position the cursor on or within the Blocks node and choose Navigator ⇾ Create.
- Leave the Base Table option set to indicate creation of a control block, not a base table block.
- In the Block Name field, enter a name for the block.
- (Optional) Set the sequence ID option to specify the position of the new block in the default block navigation sequence. Because this is a control block, none of the other options in the New Block window apply.
- Choose OK to create the control block- new control block does not yet contain any items. We can create items in an existing block in the Object Navigator or in the Layout Editor
Base Table
- Base table stores information about the associated database.
- Only oracle should be writing to and reading this table.
- Users rarely access this directly because tables are normalized.
- Most of the data is stored in a cryptic format.