This is a ISC class XI practice test for computer students. The topics covered in this paper are Boolean Algebra, Logic gates, Number conversions
Matrix programs
Q 1. The National
college of Journalism is offering courses in three different categories of
journalism, which are the print, the web and the broadcasting media.
A
student is eligible to apply if he/she satisfies any one of the following
conditions:
- The student is a graduate in any discipline
with an aggregate percentage of 75 or above and with a record of literary
skills.
OR
- The student is a graduate in Mass
Communication with an aggregate percentage of 75 or above.
The inputs are:
- Graduate in any
discipline. - Graduate in Mass
Communication. - Aggregate
percentage of 75 and above. - Record of
Literary skills.
Output:
R-Denotes
eligible to apply[1 indicates Yes and 0 indicates No in all cases]
Draw the truth tables for the inputs and
outputs given above and write the expression with the conjunctive operator for the terms which have
1 in the result column.
Q 2. A coin is tossed
two times. A win is said to occur, if each toss result in ‘HEAD’ otherwise in
all other cases it is a loss. Using the following as:
A=1, if the first
toss result in ‘HEAD’.
A=0, if the first
toss result in ‘TAIL’.
B=1, if the second
toss result in ‘HEAD’.
B=0, if the first
toss result in ‘TAIL’.
S=1, if Win
occurs.
S=0, if the win
does not occurs.
- Draw a truth table to determine all the possible values of S, depending in the values taken by A and B.
- The rule of winning in above problem is modified as follows,
A win is said to
occur if at least one toss result is HEAD, otherwise a loss occurs. Construct a
truth table for the revised winning rule and write the terms using conjunction
operator for the true result columns(1’s).
isc class xi practice test 3
Q 3. a) The following function is a part of some class. It returns the value 1 when the number is an Armstrong number, otherwise it returns 0.
class Armstrong
{
/* An armstrong number is a number which is equal to
the sum of the cube of its individual digits*/
int arms(int n)
{
int digit=0, sum=0;
int rem=n; while(?1?)
{
digit=?2?;
sum=sum+?3?; rem=?4?;
}
if(?5?)
return 1;
else return 0;
} }
i)
What is the expression / value at ?1?
ii)
What is the expression / value at ?2?
iii)
What is the expression / value at ?3?
iv)
What is the expression / value at ?4?
v)
What is the expression / value at ?5?
isc class xi practice test 3
Q 4 The following function trial() perform are a part of some class. Answer the following parts given below. Show dry run/working.
int trial(int n)
{
if(n==1)
return 2;
else if(n==2)
return 3;
return trial(n-2)+trial(n-1);
}
What will the function trial() return when the
value of n is 6.
Q 5. The following is
a part of some class. What will be the output of the function mymethod( )
when
the value of counter is equal to 3? Show the dry run/ working.
void
mymethod(int counter)
{
if(counter= =0) System.out.println(“ “);
else
{
System.out.println(“Hello
“+ counter);
mymethod(-
-counter);
System.out.println(“ “+ counter);
} }
Q 6.
The following
function Check() is a part of some class.
What will the function Check()
return when the
values of both 'm' and 'n' are equal to 5?
Show the dry run I working.
int Check (int
m, int n)
{
if (n = = 1)
return - m - -;
else
return + + m + Check (m, - -n)
}
isc class xi practice test 3