Question

doubts on computer science

Answer 1

@Opcode here :)

Answer 2

Ready :-).

Answer 3

Consider the following program :

#include<iostream.h>
class data
{int a;
public:
data( )
{
a=0;
{
data(int x)
{
a=x;
}
void disp()
{
cout<<"value is"<<a<<endl;
}
};
vpod main( )
{
data m,n(7);
m.disp( );
n.disp( );
}

a) what OOP feature do you observe in above program??
b)write the output for above program

Answer 4

I would also like to know how the code works here

Answer 5

2. class base
{
public:base( )
{
cout<<"Base Class constructor\n";
}
~base( )
{
cout<<"Base Class Destructor\n";
}
};
class der:public base
{
Base b,b1;
public:
der( )
{
cout<<"Derived Class Constructor\n";
}
~der( )
{
cout<<"Derived class destructor\n";
}
};

predict output and explain logic of code

Answer 6

3. If the get pointer position at the beginning of file ,tellg( ) returns _______

is it 0 ?

Answer 7

4. Tom recieved a carbon copy of printout .Name the printer

Answer 8

5. Arrange in ascending order of storage capacity
floppy disk,hard disk ,CD ,DVD,Pen drive

i know HD>DVD>FLOPPY where to place pen drive ?

Answer 9

6. explain L3 cache

Answer 10

7.choose odd one out
scanner ,light pen, track ball , mouse

Answer 11

scanner?

Answer 12

8. distinguish between the foll:

a) distance t1=distance(10,20);
b)distance t1(10,20)

Answer 13

9) class test
{
int a,b;
public:
test( )
{
a=10;
b=5;
}
};
define and implement copy constructor for above class

Answer 14

10) find @Opcode and operand in foll instructions

a) MVI A,06
b) ADD A,B
c)LDA 2000H
d)SUB B

I think
a) opcode =MVI operands A and 06
b)opcode=ADD operands A and B
C)i have doubt
d) opcode =sub operand=B

Answer 15

If the get pointer position at the beginning of file ,tellg( ) returns _______
Returns your current pointer position.

Tom recieved a carbon copy of printout .Name the printer
Impact Printers/ Dot matrix printers.

Arrange in ascending order of storage capacity
Floppy disk, hard disk, CD, DVD, Pen drive.
Hard disks = Most storage capacity.
Pen drive = up to 256 gigabytes
DVD = 17.08 GB (double-sided, double-layer)
CD = 700Mb
Floppy disks = I don't know the size but I know it's the smalles.

Explain L3 cache:
http://www.wisegeek.com/what-is-l3-cache.htm

Choose odd one out:
scanner ,light pen, track ball , mouse
Scanner, because the rest are pointer devices.

Answer 16

so pen drive >DVD ?

Answer 17

Yes.

Answer 18

10. what will be order of constructor invocation for foll code? explain

class A
{
.....
};
class B
{
......
}
class C
{
int val;
A obj1;
B obj2;
.......
};
void main( )
{
A a1;
B b1;
C c1;
}

Answer 19

why current position isnt it beginning position ?

Answer 20

11.constructors can be inherited .say true or false with reason .

Answer 21

12. Is it required to read data from a file and update it simultaneously ? which stream can serve this purpose ?

answer to second part is input strean i suppose

Answer 22

*input stream

Answer 23

Constructors can be inherited. True or false explain your reasoning.
False 100% sure.
Constructors are not inherited. If they were, that would cause many problems anyway.
They're instead called implicitly or explicitly by the child constructor.

A) Is it required to read data from a file and update it simultaneously ?
B) Which stream can serve this purpose ?
Answer to question A is yes.
I think the answer to "B" is "fstream"
Boop ^.^ http://www.cplusplus.com/reference/fstream/fstream/

Answer 24

lol thanks i am looking forward to the answers based on the code :P

Answer 25

Constructors are not inherited. If they were, that would cause many problems anyway.
i need to reason so i cant just say many ways

Answer 26

Number nine [9]:
```
//Regular code:
class test
{
int a,b;
public:
test( )
{
a=10;
b=5;
}
};

//Copy constructor code:
class test
{
int a,b;
public:
test() {a = 10}; //default constructor
abc(abc &5) {this.a=5.a) //copy constructor
}
};
```
Number ten [10]:
What will be order of constructor invocation for the following code? Explain.
```
class A
{
.....
};
class B
{
......
}
class C
{
int val;
A obj1;
B obj2;
.......
};
void main( )
{
A a1;
B b1;
C c1;
}
```
Order:
Class A's Constructor
Class B's Constructor
Class C's Constructor
Class C's Constructor
Class B's Constructor
Class A's Constructor
I really think is messed that up >.<

Answer 27

Number ten [10]
Find Opcode and operand in following instructions.
```
A) MVI A,06
B) ADD A,B
C) LDA 2000H
D) SUB B
```
I think
A) Opcode = MVI operands A and 06 (Agree)
B) Opcode = ADD operands A and B (Agree)
C) Get the contents of memory location 2000H into accumulator.
Maybe: (Opcode = LDA Operands 2000 and H.) Not so sure :/
D) Opcode = 'sub' operand = B (Agreed)

Answer 28

programms.....ohh my god....ruuun...

Answer 29

@Opcode for first code i think output is
07

Answer 30

nah its :
value is0
value is7