ISC (Commerce) इयत्ता १२ - CISCE Question Bank Solutions for Computer Science (Theory)

Answer the following questions related to the below image:

1. What is the output of the above gate if input A=0, B=1?
2. What are the values of the inputs if output =1?

Given are two strings, input string and a mask string that remove all the characters of the mask string from the original string.

A class StringOp is defined as follows to perform above operation.

Some of the members of the class are given below:

Specify the class StringOp giving details of the constructor( ), void accept( ), void form() and void display( ). Define a main( ) function to create an object and call all the functions accordingly to enable the task.

A class Mixarray contains an array of integer elements along with its capacity (More than or equal to 3). Using the following description, form a new array of integers which will contain only the first 3 elements of the two different arrays one after another.

Example:

Array1: { 78, 90, 100, 45, 67 }

Array2: {10, 67, 200, 90 }

Resultant Array: { 78, 90, 100, 10, 67, 200}

The details of the members of the class are given below:

Specify the class Mixarraygiving details of the constructor(int), void input( ), Mixarray mix(Mixarray,Mixarray) and void display( ). Define a main( ) function to create objects and call all the functions accordingly to enable the task.

Write the statement in Java to extract the word “MISS” from the word “SUBMISSION”.

What is the output of the statement given below?

System.out.print("FAN" + ("AUTOMATIC".charAt(5) ) );

A class Fibo has been defined to generate the Fibonacci series 0, 1, 1, 2, 3, 5, 8, 13, ……. (Fibonacci series are those in which the sum of the previous two terms is equal to the next term).

Some of the members of the class are given below:

Specify the class Fibo, giving details of the Constructor, void read( ), int fibo(int), and void display( ). Define the main() function to create an object and call the functions accordingly to enable the task.

A class Gcd has been defined to find the Greatest Common Divisor of two integer numbers. Some of the members of the class are given below:

Specify the class Gcd, giving details of the Constructor, void accept( ), int gcd(int,int), and void display( ). Define the main() function to create an object and call the functions accordingly to enable the task.

A super class Godown has been defined to store the details of the stock of a retail store. Define a subclass Update to store the details of the items purchased with the new rate and update the stock. Some of the members of both the classes are given below:

Assume that the super class Godown has been defined. Using the concept of inheritance, specify the class Update giving details of the constructor, void update ( ) and void display( ).

The super class, main function and algorithm need NOT be written.

When a sequence of OR, NOT, NOR are connected in series, the logic gate obtained is ______.

Idempotence Law states that ______.

Assertion: Recursive data structure follows the LIFO principle.

Reason: Execution of recursive code follows the concepts of data structure Queue.

State any one difference between instance variable and class variable.

The following function is a part of some class:

int jolly(int[] x, int n, int m)
  {
if (n<0)
  return m;
else if(n<x.length)
  m=(x[n]>m)?x[n]:m;
return jolly(x, --n, m);
  }

1. What will be the output of jolly() when the value of x[ ]={6,3,4,7,1}, n=4 and m=0?
2. What function does jolly() perform, apart from recursion?

Draw the logic gate diagram for the reduced expression. Assume that the variables and their complements are available as inputs.

Design a class DeciHex to accept a positive integer in decimal number system from the user and display its hexadecimal equivalent.

Example 1:

Decimal number= 25

Hexadecimal equivalent= 19

Example 2:

Decimal number =28

Hexadecimal equivalent = 1C

Some of the members of the class are given below.

Specify the class DeciHex giving details of the constructor( ), void getNum( ), void convert(int) and void display(). Define a main() function to create an object and call all the functions accordingly to enable the task.

Draw the logic circuit for 3:8 decoder (Octal decoder). Which multiplexer can be derived from the Octal decoder?

Consider the following statement written in class Circle where pi is its data member.

static final double pi = 3.142;

Which of the following statements are valid for pi?

1. It contains a common value for all objects class Circle.
2. Its value is non-changeable.
3. At a time two access modifiers, static and final, cannot be applied to a single data member pi.

A matrix M[-6….10, 4…15] is stored in the memory, with each element requiring 4 bytes of storage. If the base address is 1025, find the address of M[4][8] when the matrix is stored in column major-wise.

The following function getIt() is a part of some class. Assume x is a positive integer, f is the lower bound of arr[ ] and l is the upper bound of the arr[ ].

Answer the questions given below along with dry run/working.

public int getIt(int x,intarr[],int f,int l)
  {
   if(f>l)
     return-1;
   int m=(f+l)/2;
   if(arr[m]<x)
     return getIt(x,m+1,l);
   else if(arr[m]>x)
     return getIt(x,f,m-1);
   else
     return m;
}

1. What will the function getIt( ) return if arr[ ] = {10,20,30,40,50} and x = 40?

2. What is function getIt( ) performing apart from recursion?

Draw the logic circuit to decode the following binary number (0001, 0101, 0111, 1000, 1010, 1100, 1110,1111) to its hexadecimal equivalents. Also, state the Hexadecimal equivalents of the given binary numbers.