11th Computer Science practice one mark question

Which of the following activities is algorithmic in nature?

(a) Assemble a bicycle.                                                      (b) Describe a bicycle.

(c) Label the parts of a bicycle.                                          (d) Explain how a bicycle works.

Which of the following activities is not algorithmic in nature?

(a) Multiply two numbers.                                                  (b) Draw a kolam.

(c) Walk in the park.                                                         (d) Swapping of two numbers.

Omitting details inessential to the task and representing only the essential features of the task is known as

(a) Specification                   (b) abstraction         (c) composition                    (d) decomposition

Stating the input property and the input-output relation a problem is known

(a) Specification                  (b) statement             (c) algorithm                         (d) definition

A loop invariant need not be true

(a) at the start of the loop.                                       (b) at the start of each iteration

(c) at the end of each iteration                                (d) at the start of the algorithm

We wish to cover a chessboard with dominoes, the number of black squares and the number of white squares covered by dominoes, respectively, placing a domino can be modeled by

(a) b := b + 2                         (b) w := w + 2           (c) b, w := b+1, w+1            (d) b := w

If m x a + n x b is an invariant for the assignment a, b : = a + 8, b + 7, the values of m and n are

(a) m = 8, n = 7                     (b) m = 7, n = -8      (c) m = 7, n = 8                     (d) m = 8, n = -7

Which of the following is not an invariant of the assignment?

m, n := m+2, n+3

(a) m mod 2                           (b) n mod 3                (c) 3 X m – 2 X n                  (d) 2 X m – 3 X n

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