CBSE Class 12 Computer Science Question Paper 2012 (Set I (Delhi))

CBSE CLASS XII Questions

• 1.

  List one advantage and one disadvantage of Bus topology.

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• 2.

  Ms. Zoya is a Production Manager in a factory which packages mineral water. She decides to create a table in a database to keep track of the stock present in the factory. Each record of the table will have the following fields:

  W_Code – Code of the item (type – CHAR(5))
  W_Description – Description of the item (type – VARCHAR(20))
  B_Qty – Balance quantity of the item (type – INTEGER)
  U_Price – Unit Price of the item (type – FLOAT)

  The name of the table is W_STOCK.

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• 3.

  Sanjeevani is a big group of educational institutions with its head office in Hyderabad. It is planning to set up a new University in Amritsar. The Amritsar University Campus will have four blocks/buildings – ADMIN, ACADEMIC, HOSTEL, SPORTS. You, as a network expert, need to suggest the best network-related solutions for them to resolve the issues/problems mentioned in points (i) to (v), keeping in mind the distances between various blocks / buildings and other given parameters.

  Block to Block distances (in Mtrs.):

  FROM	TO	DISTANCE
  ADMIN	ACADEMIC	60 M
  ADMIN	HOSTEL	160 M
  ADMIN	SPORTS	80 M
  ACADEMIC	HOSTEL	40 M
  ACADEMIC	SPORTS	120 M
  HOSTEL	SPORTS	150 M

  Distance of Hyderabad Head Office from Amritsar University Campus = 2000 km.

  Number of computers in each block: ADMIN – 25, ACADEMIC – 600, HOSTEL – 120, SPORTS – 50.

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• 4.

  What is protocol in the context of computer networks? Which protocol is used to transmit hypertext across the web?

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• 5.

  Write a Python function that displays the words in which the lowercase letter 'e' appears at least twice in the text file 'Space.txt'. For example, if the file contains:

  Space exploration has unlocked incredible advancements in technology and science. Since the first moon landing in 1969, space agencies have sent probes to Mars, Jupiter and beyond. The ISS, orbiting Earth at about 400 km, serves as a hub for research. With missions planned for 2030, humanity’s cosmic journey continues!

  Then the function should display:

  incredible advancements science. agencies serves research.

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• 6.

  Write the output of the following code:

  def Exam2026(given):
      new = 0
      while given:
          if new % 2:
              new += given % 10
          else:
              new += given % 5
          print(new, end='-')
          given //= 10
  Exam2026(123456)

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