CBSE Class 12 Computer Science Question Paper 2011 (SOS)

CBSE CLASS XII Questions

• 1.

  Assume that you are working in the IT Department of a Creative Art Gallery (CAG), which sells different forms of art creations like Paintings, Sculptures etc. The data of Art Creations and Artists are kept in tables Articles and Artists respectively. Following are few records from these two tables:
  
  (i) To display all the records from the Articles table in descending order of Price.
  (ii) To display the details of Articles which were created in the year 2020.
  (iii) To display the structure of the Artists table.
  (iv-a) To display the name of all artists whose Article is Painting using Equi Join.
  (iv-b) To display the name of all artists whose Article is 'Painting' using Natural Join

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• 2.

  Nisha is assigned the task of maintaining the staff data of an organization. She has to store the details of the staff in the SQL table named EMPLOYEES with attributes as EMPNO, NAME, DEPARTMENT, BASICSAL to store Employee’s Identification Number, Name, Department, and Basic Salary respectively. There can be two or more Employees with the same name in the organization.
  (i)
  (a) Help Nisha to identify the attribute which should be designated as the PRIMARY KEY. Justify your answer.
  OR
  (b) Help Nisha to identify the constraint which should be applied to the attribute NAME such that the Employees’ Names cannot be left empty or NULL while entering the records but can have duplicate values.
  (ii)
  (a) Write the SQL command to change the size of the attribute BASICSAL in the table EMPLOYEES to allow the maximum value of 99999.99 to be stored in it.
  OR
  (b) Write the SQL command to delete the table EMPLOYEES.
  

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• 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.
  

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• 4.

  Write a Python function that displays all the words starting and ending with a vowel from a text file "Report.txt".
  The consecutive words should be separated by a space in the output.
  For example, if the file contains:
  Once there was a wise man in a village.
  He was an awesome story-teller.
  He was able to keep people anchored while listening to him.
  Then the output should be:
  Once a a awesome able
  

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• 5.

  What possible output from the given options is expected to be displayed when the following code is executed?
  

  import random
  Cards = ["Heart", "Spade", "Club", "Diamond"]
  for i in range(2):
      print(Cards[random.randint(1, i+2)], end="#")
  

  • Spade#Diamond#
    
  • Spade#Heart#
    
  • Diamond#Club#
    
  • Heart#Spade#
    
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• 6.

  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.
  

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