Commerce (English Medium) इयत्ता १२ - CBSE Question Bank Solutions

When are the following built-in exceptions raised? Give examples to support your answer.

ZeroDivisionError

Differentiate between write() and writelines().

Consider the following lists:

List 1:

List 2: 

If the lists are sorted using Insertion sort then which of the lists List1 or List 2 will make the minimum number of comparisons? Justify using diagrammatic representation.

During admission in a course, the names of the students are inserted in ascending order. Thus, performing the sorting operation at the time of inserting elements in a list. Identify the type of sorting technique being used and write a program using a user defined function that is invoked every time a name is input and stores the name in ascending order of names in the list.

Use the hash function: h(element) = element%11 to store the collection of numbers: [44, 121, 55, 33, 110, 77, 22, 66] in a hash table. Display the hash table created. Search if the values 11, 44, 88, and 121 are present in the hash table, and display the search results.

Write a Python program by considering a mapping of the list of countries and their capital cities such as:

CountryCapital= {'India':'New Delhi','UK':
                             'London','France':'Paris',
                             'Switzerland': 'Berne',
                             'Australia': 'Canberra'}

Let us presume that our hash function is the length of the Country Name. Take two lists of appropriate size: one for keys (Country) and one for values (Capital). To put an element in the hash table, compute its hash code by counting the number of characters in the Country, then put the key and value in both lists at the corresponding indices. For example, India has a hash code of 5. So, we store India at the 5th position (index 4) in the keys list, New Delhi at the 5th position (index 4) in the values list, and so on. So that we end up with:

Now search the capital of India, France, and the USA in the hash table and display your result.

A school that has 500 students wants to identify beneficiaries of the merit-cum-means scholarship, achieving more than 75% for two consecutive years and having a family income of less than 5 lakh per annum. Briefly describe data processing steps to be taken to beneficial prepare the list of schools.

Mention any two main advantages of using a network of computing devices.

Write down the names of a few commonly used networking devices.

How is tree topology different from bus topology?

What do you mean by a modem? Why is it used?

Explain the following device:

Switch

Explain the following device:

Repeater

Explain the following device:

Gateway

Explain the following device:

Router

Explain the following device:

NIC

Which communication mode allows communication in both directions simultaneously?

______ is a communication methodology designed to deliver both voice and multimedia communications over Internet protocol.

Which of the following statement(s) would give an error after executing the following code?

S="Welcome to class XII" # Statement 1
print(S)       #Statement 2
S="Thank you"    # Statement 3
S[0]= '@'      # Statement 4
S=S+"Thank you"   # Statement 5

Rao has written a code to input a number and check whether it is prime or not. His code is having errors. Rewrite the correct code and underline the corrections made.

def prime():
n=int(input("Enter number to check :: ")
for i in range (2, n//2):
if n%i=0:
print("Number is not prime \n")
break
else:
print("Number is prime \n’)