CBSE Class 12 Computer Science Question Paper 2006 (Set 1)

CBSE CLASS XII Questions

• 1.

  A file PASSENGERS.DAT stores the records of passengers using the following structure:
  PNR, PName, BRDSTN, DESTN, FARE
  
  Where:
  - PNR — Passenger Number (string type)
  - PName — Passenger Name (string type)
  - BRDSTN — Boarding Station Name (string type)
  - DESTN — Destination Station Name (string type)
  - FARE — Fare amount for the journey (float type)
  
  Write user-defined functions in Python for the following tasks:
  
  (i) Create() – to input data for passengers and write it in the binary file PASSENGERS.DAT.
  (ii) SearchDestn(D) – to read contents from the file PASSENGERS.DAT and display the details of those Passengers whose DESTN matches with the value of D.
  (iii) UpdateFare() – to increase the fare of all passengers by 5% and rewrite the updated records into the file PASSENGERS.DAT.
  

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• 2.

  Write the following user-defined functions in Python:
  
  (i) push_trail(N, myStack): Here N and myStack are lists, and myStack represents a stack.
  The function should push the last 5 elements from the list N onto the stack myStack.
  Assume that N contains at least 5 elements.
  
  (ii) pop_one(myStack): The function should pop an element from the stack myStack, and return this element.
  If the stack is empty, then the function should display the message 'Stack Underflow', and return None.
  
  (iii) display_all(myStack): The function should display all the elements of the stack myStack, without deleting them.
  If the stack is empty, the function should display the message 'Empty Stack'.
  

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• 3.

  The code given below accepts N as an integer argument and returns the sum of all integers from 1 to N. Observe the following code carefully and rewrite it after removing all syntax and logical errors. Underline all the corrections made.
  
  

  def Sum(N):
      S = 0
      for I in range(1, N + 1):
          S = S + I
      return S
  
  print(Sum(10))
  

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• 4.

  Write a function Delete_Theatre() to input the value of Th_ID from the user and permanently delete the corresponding record from the THEATRE table in the CINEMA database.
  
  Given:
  Host: localhost, User: root, Password: Ex2025
  

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• 5.

  Expand and explain the term URL.
  

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• 6.

  Write a Python function that displays all the lines containing the word 'vote' from a text file "Elections.txt".
  For example, if the file contains:
  In an election many people vote to choose their representative.
  The candidate getting the maximum share of votes stands elected.
  Normally, one person has to vote once.
  The process of voting may vary with time and region.
  Then the output should be:
  In an election many people vote to choose their representative.
  Normally, one person has to vote once.
  

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