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C++ Institute CPP Exam - Topic 5 Question 106 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 106
Topic #: 5
[All CPP Questions]

What happens when you attempt to compile and run the following code?

#include

#include

#include

using namespace std;

class A {

int a;

public:

A(int a) : a(a) {}

int getA() const { return a; } void setA(int a) { this?>a = a; }

};

int main () {

int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};

deque d (t,t+15);

int number = count(d.begin(), d.end(), 2);

cout<< number<

return 0;

}

Program outputs:

Show Suggested Answer Hide Answer
Suggested Answer: E

by Tegan at Mar 23, 2025, 12:03 PM

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My
4 months ago
Definitely a compilation error, right?
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Shawna
4 months ago
Wait, is there a typo in the setA function?
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Filiberto
4 months ago
I'm pretty sure it outputs 4.
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Wilburn
4 months ago
The code counts occurrences of 2 in the deque.
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Galen
4 months ago
I thought it would be 3, but I guess I was wrong!
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Jovita
5 months ago
Wait, I’m not sure if the setA function has a typo. Does this affect whether the code runs or not?
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Shawnda
5 months ago
I feel like I practiced a similar question, and I think the answer is 4 since '2' appears four times in the array.
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Pamella
5 months ago
I think the code should compile fine, but I’m a bit confused about the output. Did we cover how to count elements in a deque?
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Cherelle
5 months ago
I remember something about the count function, but I'm not sure how many times '2' appears in the array.
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Nida
6 months ago
Ah, I see now. The `deque` is initialized with the array `t`, which contains the values `{1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5}`. The `count()` function then counts the number of occurrences of the value `2` in the `deque`, which is 4. So the correct answer is A.
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Sharika
6 months ago
I'm not entirely sure about this one. The code looks a bit complex with the `deque` and the `count()` function. I'll need to carefully step through the logic and make sure I understand what's happening. Maybe I'll try running the code myself to see the output.
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Eden
6 months ago
Okay, I think I've got this. The code creates a `deque` of integers and then uses `count()` to count the number of occurrences of the value `2` in the `deque`. The output should be the number of times `2` appears in the `deque`, which is the correct answer.
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Aja
6 months ago
Hmm, I'm a bit confused about the `deque` container. I'll need to review how it works and how it differs from other containers like `vector`. I should also double-check the syntax for the `count()` function to make sure I understand it correctly.
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Alayna
6 months ago
This looks like a straightforward question about using the `count()` function from the `` library. I'll carefully read through the code and think about how the `count()` function works with the `deque` container.
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Asha
11 months ago
This is too easy, the answer has to be B. I mean, come on, counting occurrences of a number? That's like programming 101. Unless... there's some kind of sneaky twist I'm missing. Nah, I'm sticking with B.
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Ilene
11 months ago
I'm with you guys, B seems like the correct answer here.
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Cecilia
11 months ago
Yeah, counting occurrences is a basic concept. B sounds right to me too.
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Arlette
11 months ago
I agree, it seems pretty straightforward. B is the most likely answer.
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Stevie
12 months ago
Haha, the code looks like it was written by a prankster. Throwing in a random class A just to confuse us. But I'm not falling for that trap, I'm going with B!
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Adelle
12 months ago
Wait, wait, wait... why is there a class A in the code? Is that just a red herring or is it somehow relevant? Ah, who cares, I'll just go with the most straightforward answer, which is B.
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Odette
10 months ago
No, the class A doesn't affect the output, the answer is B for sure.
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Tamera
10 months ago
I'm not sure about that, I think the class A might have some impact on the output.
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Andrew
10 months ago
Yeah, I agree, the code is just counting the number 2 in the deque, so the answer is B.
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Salley
10 months ago
I think the class A is just there to confuse us, the answer is B.
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Wava
1 year ago
Oh, that makes sense. I see your point now.
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Ira
1 year ago
I disagree, I believe the answer is A) 4 because there are 4 occurrences of the number 2 in the deque
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Cornell
1 year ago
Hmm, this looks like a simple problem of counting occurrences of a number in a container. I'll go with option B, since 2 appears 3 times in the given array.
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Fatima
11 months ago
So, the output will be 3.
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Brande
11 months ago
Yes, because there are 3 occurrences of 2 in the array.
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Delbert
11 months ago
I agree, it should be 3.
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Rueben
12 months ago
I think the answer is B.
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Wava
1 year ago
I think the answer is B) 3
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