Computational Thinking (CT) Qualifier important questions

100 questions to practise before the Computational Thinking Qualifier, covering every kind of question the exam has asked since 2023. Practise them in learning mode: each question has a worked solution.

Question 1

One correct option

Assume that a, b, and c are three distinct integers. What will X represent after the execution of the following procedure?

Step 1. Maintain variable X and initialize it to 0

Step 2. If a < b then go to Step 4

Step 3. If b < c then store b in X else store c in X and stop the procedure.

Step 4. If a < c then store a in X else store c in X

A
Largest among a, b, and c
B
Smallest among a, b, and c
C
X will always be 0
D
Second smallest among a, b, and c

Question 2

One correct option

The following pseudocode is executed using the “Scores” dataset. What will count represent at the end of pseudocode?

1count = 0
2while(Table 1 has more rows){
3    Read the first row X from Table 1
4    C = 0
5    if(X.Mathematics > 75){
6        C = C + 1
7    }
8    if(X.Physics > 75){
9        C = C + 1
10    }
11    if(X.Chemistry > 75){
12        C = C + 1
13    }
14    if(C ≤ 2){
15        count = count + 1
16    }
17    Move X to Table 2
18}

A
Number of students who scored more than 75 marks in at least two subjects
B
Number of students who scored more than 75 marks in two subjects
C
Number of students who scored more than 75 marks in at most two subjects
D
Number of students who scored more than 75 marks in all three subjects

Question 3

One correct option

The following pseudocode is executed using the “Scores” dataset.

1A = 0, B = 0, C = False
2while(Pile 1 has more cards){
3    Read the top card X from Pile 1
4    if(X.Gender == 'F'){
5        if(X.CityTown == "Chennai"){
6            A = A + 1
7        }
8    }
9    Move card X to Pile 2
10}
11while(Pile 2 has more cards){
12    Read the top card X from Pile 2
13    if(X.CityTown == "Bangalore"){
14        if(X.Gender ≠ 'F'){
15            B = B + 1
16        }
17    }
18    Move card X to Pile 1
19}
20if(A > B){
21    C = True
22}

When will C be True?

A
If there are more male students from Bangalore than female students from Chennai
B
If there are more female students from Chennai than female students from Bangalore
C
If there are more female students from Chennai than male students from Bangalore
D
If there are more students from Chennai than students from Bangalore

Computational Thinking (CT) Qualifier important questions

Question 1

Question 2

Question 3

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