ISC (Commerce) Class 12 - CISCE Question Bank Solutions

Assertion: For proposition ∼A=> B, its contrapositive is B =>∼A

Reason: Contrapositive is the converse of inverse for any proposition.

The complement of the Boolean expression (P' • Q) (R • S') is ______.

An array ARR [ -5 .....15, 10.....20] stores elements in Row Major Wise with each element requiring 2 bytes of storage. Find the address of ARR [10] [15] when the base address is 2500.

Draw the logic gate diagram for 2-input OR gate using NAND gates only. Show the expression at each Step.

Write the canonical form of the cardinal terms, m₃ and M₅ for F (A, B, C, D).

A class Ins Sort contains an array of integers which sorts the elements in a particular order.

Some of the members of the class are given below.

Specify the class InsSort giving details of the constructor(), void getArray( ), void insertionSort( ), double find() and void display(). Define a main( ) function to create an object and call all the functions accordingly to enable the task.

Design a class Coding to perform some string related operations on a word containing alphabets only.

Example: Input: "Java"

Output: Original word: Java

J=74

a=97

v= 118

a=97

Lowest ASCII code: 74

Highest ASCII code: 118

Some of the members of the class are given below:

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

CardGame is a game of mental skill, built on the simple premise of adding and removing the cards from the top of the card pile.

The details of the class CardGame are given below.

1. Specify the class CardGame giving details of the functions void addCard(int) and int drawCard( ). Assume that the other functions have been defined.
   The main() function and algorithm need NOT be written.
2. Name the entity described above and state its principle.

A super class EmpSal has been defined to store the details of an employee. Defie a subclass (overtime to compute the total salary of the employee, after adding the overtime amount based on the following criteria.

• If hours are more than 40, then 5000 are added to salary as an overtime amount
• If hours are between 30 and 40 (both inclusive), then 3000 are added to salary as an overtime amount
• If hours are less than 30, then the salary remains unchanged The details of the members of both the classes are given below:

Assume that the super class EmpSal has been defined. Using the concept of inheritance, specify the class Overtime giving the details of the constructer (...), void calSal() and void show().

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

Assertion: Recursion utilises more memory as compared to iteration.

Reason: Time complexity of recursion is higher due to the overhead of maintaining the function call stack.

Study the given propositions and the statements marked Assertion and Reason that follow it. Choose the correct option on the basis of your analysis.

p = I am a triangle

q = I am a three-sided polygon

s1 = p → q

s2 = q → p

Assertion: s2 is converse of s1

Reason: Three-sided polygon must be a triangle.

Assertion: In Java, the String class is used to create and manipulate strings, and it is immutable.

Reason: Immutability ensures that once a String object is created, its value cannot be changed.

A full adder needs five gates and those are 3 AND gates, 1 OR gate and 1 XOR gate. When a full adder is constructed using 2 half adders, it also requires 5 gates. State the names along with the quantity those gates.

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

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.