Download CBSE Computer Science Sample Paper Class XI (11th) 2006
Sample Paper 2006
Computer Science
CLASS :XI
(set-5)
Duration: 3 hours MAX.MARKS: 70
Q1. What is an operating system? [1mk]
Q2. What is cascading of I/O operators? [1mk]
Q3. What is the difference between ‘h’ and “h” in c++? [1mk]
Q4. How are files and devices implemented at lowest level? [1mk]
Q5. What is an interpreter? [2mk]
Q6.How many times “hello” will be printed in the following code fragment:
for (i=0; i<5; i++)
for (j=0; j<4; j++)
cout<< “hello”; [2mk]
Q7.Evaluate the following, where a, b, c are integers and d, f are floating point numbers.
The value of a=8, b=4 and d=2.5
(i) f = a * b + a/b
(ii) c = d-a + b % a
(iii) c= (++a) * (b++) - (++d)
(iv) f = (++b) / b – a %b [2mk]
Q8. Explain ‘break’ and ‘continue’. [2mk]
Q9. What is the output of the following:
1. # include<iostream.h>
void main ( )
{
int i=0;
for (i=1; i<=20;i++)
{
cout<<i;
i=i+2;
}
}
2. # include<iostream.h>
void main( )
{
a=3;
a=a+1;
if (a>5)
cout<<a;
else
cout<<(a+5);
} [2mk]
Q10. What will be the output of the following program segment:
If input is as:
(a) w (b) r (c) s (d) f
cin >>code
switch (code)
{
case ‘w’: cout<<”winter”;
case ‘r’ : cout<<”rainy”;
break;
case ‘s’ : cout<<”summer”;
break;
default: cout<<” wrong code”;
} [2mk]
Q11. What the difference between while and do-while loop? [2mk]
Q12. What is the significance of default clause in a switch statement?
What is meant by variable’s scope? [2mk]
Q13. Define pointer variable and enumeration. Give example of each. [2mk]
Q14.Determine the output:
(i) int a=300, b=0, c=0;
if(a>=400)
{
b=300;
cout<<a<<b<<c;
}
(ii) i=6;
while(i)
cout<<i--;
cout<< “
thank you” ; [2mk]
Q15. What is a header file and why we include them in our program? [2mk]
Q16. Explain procedural programming and modular programming [3mk]
Q17. Describe microcomputer, mainframe and super computer. [3mk]
Q18. What is a loop? What is infinite loop? Write a for loop to print values
10 to 1 on separate line in descending order [3mk]
Q19. What output will the following code fragment produce?
void main( )
{
int val, res, n=1000;
cin>>val;
res = n+val >1750 ? 400:200 ;
cout<<res;
}
(i) if val=2000 (ii) if val=1000 (iii) if val=500 [3mk]
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