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Question number: 544

» Database » Oracle

MCQ▾

Question

What is a RADIO GROUP?

Choices

Choice (4) Response

a.

Mutually exclusive

b.

Select more than 1 column

c.

None of the above

d.

Question does not provide sufficient data or is vague

Answer

a.

Explanation

Define Radio Group

Define Radio Group

Define Radio Group

  • A group of radio buttons provides user with a choice of operations or data to use in a query- called radio group.

  • Radio group is mutually exclusive.

  • Perfect way to represent an enumeration.

  • The control returns a numeric value to indicate its state.

  • We can change the value for radio button control with the value property.

  • The data block consists of 3 particular radio groups.

    Different types of RADIO GROUP

  • Radiogroup

    • The statement type of radio group

    • Displays the text and provides a return value.

  • Radiogroup with Redirect

    • Does not submit the page for processing, but it will redirect the page back.

    • Used to set session state for the item, but not submit.

    • Used when something else on the page may depend on the value for the radio group a condition.

  • Radiogroup with submit

    • Submits the page when an item in the radio group is selected.

Different types of radio group

Different Types of Radio Group

Different types of radio group

Question number: 545

» Basic CS » Data Structures

Essay Question▾

Describe in Detail

What are the methods available in storing sequential files?

Explanation

Straight merging:

  • This is straight sorting technique.

  • The straight merge distributes the initial records onto two tapes

  • They contain the same number of records; one tape contains only one more record than the other.

  • If done for the original file then the configuration of tapes appear as the initial distribution.

Natural merging:

  • Distributes the records of the original file to two tapes, so that sorted sub files or runs are preserved and treated as a unit.

Polyphase sort:

  • An algorithm decreases the number of runs at every iteration of the main loop merging run into large runs.

  • It uses external sorting.

  • Reduces the number of intermediate files needed by reusing files.