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• 17 September 2024

Class 12 CBSE Final Term Question Bank - Computer Science

Section A – Multiple Choice Questions (1 mark each)

1. State True or False: Identifiers are names used to identify a variable, function in a program.
   • True
   • False
2. Which of the following is a valid keyword in Python?
   • a) false
   • b) return
   • c) non_local
   • d) none
3. Given the following Tuple: Tup = (10, 20, 30, 50), which of the following statements will result in an error?
   • a) print(Tup[0])
   • b) Tup.insert(2,3)
   • c) print(Tup[1:2])
   • d) print(len(Tup))
4. Consider the given expression: 5<10 and 12>7 or not 7>4. What will be the correct output if the given expression is evaluated?
   • a) True
   • b) False
   • c) NONE
   • d) NULL
5. Select the correct output of the following code:

   S = "Amrit Mahotsav@ 75"
   A = S.partition(" ")
   print(A)

   • a) ('Amrit Mahotsav', '@', '75')
   • b) ['Amrit', 'Mahotsav', '@', '75']
   • c) ('Amrit', 'Mahotsav@ 75')
   • d) ('Amrit', ", 'Mahotsav @ 75')
6. Which of the following mode keeps the file offset position at the end of the file?
   • a) r+
   • b) r
   • c) w
   • d) a
7. Which function is used to arrange the elements of a list in ascending order?
   • a) sort()
   • b) arrange()
   • c) ascending()
   • d) asort()
8. Which of the following operators will return either True or False?
   • a) +=
   • b) !=
   • c) =
   • d) *=
9. Which statement(s) would give an error after executing the following code?

   
   Stud = {"Murugan": 100, "Mithu": 95}
   print(Stud[95])
           

   • a) Statement 2
   • b) Statement 3
   • c) Statement 4
   • d) Statements 2 and 4
10. ___ is the number of tuples in a relation.
    • a) Attribute
    • b) Degree
    • c) Domain
    • d) Cardinality
11. The syntax of `seek()` is: `file object.seek(offset[, reference_point])`. What is the default value of the reference point?
    • a) 0
    • b) 1
    • c) 2
    • d) 3
12. ___ clause is used with the SELECT statement to display data in a sorted form with respect to a specified column.
    • a) WHERE
    • b) ORDER BY
    • c) HAVING
    • d) DISTINCT
13. ___ communication is used for point-to-point communication such as radar and satellite.
    • a) INFRARED WAVES
    • b) BLUETOOTH
    • c) MICROWAVES
    • d) RADIOWAVES
14. What will the following expression evaluate to?

    print(4 + 3 * 5 / 3 - 5 % 2)

    • a) 8.5
    • b) 8.0
    • c) 10.2
    • d) 10.0
15. Which function returns the sum of all elements of a list?
    • a) count()
    • b) sum()
    • c) total()
    • d) add()
16. fetchall() method fetches all rows in a result set and returns a:
    • a) Tuple of lists
    • b) List of tuples
    • c) List of strings
    • d) Tuple of strings
17. Assertion (A): To use a function from a particular module, we need to import the module.
    Reason (R): import statement can be written anywhere in the program, before using a function from that module.
    • a) Both (A) and (R) are true and (R) is the correct explanation for (A).
    • b) Both (A) and (R) are true and (R) is not the correct explanation for (A).
    • c) (A) is true but (R) is false.
    • d) (A) is false but (R) is true.
18. Assertion (A): A stack is a LIFO structure.
    Reason (R): Any new element pushed into the stack always gets positioned at the index after the last existing element in the stack.
    • a) Both (A) and (R) are true and (R) is the correct explanation for (A).
    • b) Both (A) and (R) are true and (R) is not the correct explanation for (A).
    • c) (A) is true but (R) is false.
    • d) (A) is false but (R) is true.