Consider the definition of the object datatype ClassDict. ClassDict private fields: Dict, keys private procedures: Procedure isKey(D, k) foreach i in keys(D) { if (i == k) { return (True) } } return (False) End isKey public procedures: Procedure initialize( ) Dict = { } keys = [ ] End initialize Procedure addElement(key, value) if (not isKey(Dict, key)) { Dict[key] = value keys = keys ++ [key] } End addElement End ClassDict Let cD be a ClassDict object. Choose the correct statement(s) based on the definition of ClassDict. It is a Multiple Select Question (MSQ).

(B) cD.Dict, cD.keys cannot be updated directly.

(C) Many objects like cD of datatype ClassDict can be created.

(A) cD.initialize cannot be called directly.

(D) The procedure addElement returns Dict.

Computational Thinking · End Term · 22 Aug 2021 · May 2021 term

Question 13: Consider the definition of the object datatype ClassDict…

Question 13

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Consider the definition of the object datatype ClassDict.

text

1ClassDict
2    private fields:
3        Dict, keys
4    private procedures:
5        Procedure isKey(D, k)
6            foreach i in keys(D) {
7                if (i == k) {
8                    return (True)
9                }
10            }
11            return (False)
12        End isKey
13    public procedures:
14        Procedure initialize( )
15            Dict = { }
16            keys = [ ]
17        End initialize
18
19        Procedure addElement(key, value)
20            if (not isKey(Dict, key)) {
21                Dict[key] = value
22                keys = keys ++ [key]
23            }
24        End addElement
25End ClassDict

Let cD be a ClassDict object. Choose the correct statement(s) based on the definition of ClassDict. It is a Multiple Select Question (MSQ).

Select all that apply.

A
cD.initialize cannot be called directly.
B
cD.Dict, cD.keys cannot be updated directly.
C
Many objects like cD of datatype ClassDict can be created.
D
The procedure addElement returns Dict.

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Correct answers

B
cD.Dict, cD.keys cannot be updated directly.
C
Many objects like cD of datatype ClassDict can be created.

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Question 13 of 25 in the IIT Madras BS Computational Thinking (Computational Thinking (CT)) End Term paper sat on 22 Aug 2021, in the May 2021 term (IITM TERM FINAL EXAM POD21TEFNQPA 22 Aug 2021). It carries 2 marks.

Question 13: Consider the definition of the object datatype ClassDict…

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