CBSE Class 12 Computer Science Question Paper 2010 (Set 91/1 (Delhi))

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.
  

  View Solution

  ---

• 2.

  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
  

  View Solution

  ---

• 3.

  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.
  

  View Solution

  ---

• 4.

  A stack, named ClrStack, contains records of some colors. Each record is represented as a tuple containing four elements — ColorName, RED, GREEN, BLUE. ColorName is a string, and RED, GREEN, BLUE are integers. For example, a record in the stack may be ('Yellow', 237, 250, 68).
  
  Write the following user-defined functions in Python to perform the specified operations on ClrStack:
  
  (i) push_Clr(ClrStack, new_Clr): This function takes the stack ClrStack and a new record new_Clr as arguments and pushes this new record onto the stack.
  
  (ii) pop_Clr(ClrStack): This function pops the topmost record from the stack and returns it. If the stack is already empty, the function should display the message "Underflow".
  
  (iii) isEmpty(ClrStack): This function checks whether the stack is empty. If the stack is empty, the function should return True, otherwise the function should return False.
  

  View Solution

  ---

• 5.

  Write the output on execution of the following Python code:
  
  

  def Change(X):
      for K, V in X.items():
          L1.append(K)
          L2.append(V)
  
  D = {1: "ONE", 2: "TWO", 3: "THREE"}
  L1 = []
  L2 = []
  Change(D)
  print(L1)
  print(L2)
  print(D)
  

  View Solution

  ---

• 6.

  Expand the term PPP. What is the use of PPP?
  

  View Solution