Languages [3i Infotech Placement]: Sample Questions 391 - 393 of 546

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Question 391

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Describe in Detail

Essay▾

List out some of the OODBMS available.

Explanation

• GEMSTONE/OPAL of Gemstone systems.
• ONTOS of Ontos.
• Objectivity of Objectivity Inc.
• Versant of Versant objects technology.
• Object store of Object Design.
• ARDENT of ARDENT software.
• POET of POET software.

Question 392

Languages
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Write in Short

What is update method called?

Explanation

• The update () method is defined by the AWT and is called when our applet has requested that a portion of its window be redrawn.
• The problem is that the default version of update () first fills an applet with the default background colour and then calls paint () .
• We can override the update () method.

Question 393

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Describe in Detail

Essay▾

What is the output of the following program?

1. `int swap (int ⚹a, int ⚹b)`
2. `{`
3. `    ⚹a =⚹ a +⚹ b;`
4. `    ⚹b =⚹ a -⚹ b;`
5. `    ⚹a =⚹ a -⚹ b;`
6. `}`
7. `main ()`
8. `{`
9. `    int x =10, y =20;`
10. `    swap (&x, &y);`
11. `    printf ( “x =%d y =%d”, x, y);`
12. `}`

Explanation

In this program

 int x = 10, y = 20; Given the integer variable x = 10 and y = 20 swap (&x, &y) ; This is use for swapping two values function int swap (int ⚹ a, int ⚹ b){⚹ a =⚹ a +⚹ b;⚹ b =⚹ a -⚹ b;⚹ a =⚹ a -⚹ b;} In a swap function a = x and b = ySo a = 10 and b = 20a =⚹ a +⚹ b;⚹ a = 10 + 20 = 30⚹ b =⚹ a -⚹ b;⚹ b = 30 - 20 = 10⚹ a =⚹ a -⚹ b⚹ a = 30 - 10 = 20 printf ( “x =% d y =% d” , x, y) ; Now the printf print the value of x = 20and y = 10

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