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C++ Institute CPP Exam - Topic 9 Question 90 Discussion

What happens when you attempt to compile and run the following code?#include #include #include #include using namespace std;class B { int val;public:B(int v):val(v){}int getV() const {return val;} bool operator < (const B & v) const { return val
E) compilation error
A) 1 0
B) 1 1
C) true true
D) false false

C++ Institute CPP Exam - Topic 9 Question 90 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 90
Topic #: 9
[All CPP Questions]

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

#include

#include

#include

#include

using namespace std;

class B { int val;

public:

B(int v):val(v){}

int getV() const {return val;} bool operator < (const B & v) const { return val

ostream & operator <<(ostream & out, const B & v) { out<

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) { out<

int main() {

int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};

deque d1(t, t+10);

sort(d1.begin(), d1.end());

set s1(t,t+10);

cout<

return 0;

}

Program outputs:

Show Suggested Answer Hide Answer
Suggested Answer: E

by Rikki at Jul 13, 2024, 08:54 PM

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Delmy
10 months ago
I doubt it runs without errors.
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Kristel
10 months ago
Wait, how does binary_search work with custom types?
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Hildred
11 months ago
Nah, it should be 1 1.
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Carmelina
11 months ago
I think it outputs 1 0.
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Xochitl
11 months ago
The code compiles fine.
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Beckie
11 months ago
I’m leaning towards option A for the output, but I could see it being different if the sorting doesn't work as expected.
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Major
12 months ago
I’m a bit confused about the initialization of `deque`. Does it really take the array of integers directly like that?
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Vincent
12 months ago
I think the `binary_search` function will return true for the `set`, but I'm not confident about the `deque`. I feel like I saw a similar question in practice.
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Josefa
12 months ago
I remember something about how `deque` and `set` handle sorting differently, but I'm not sure how that affects the output here.
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Pearlene
12 months ago
I'm a little unsure about this one. The use of the custom `B` class and the different container types is throwing me off. I'll need to carefully review the code and the expected output to make sure I don't miss any subtle details.
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Zona
12 months ago
This is a good one! I'm pretty confident I can figure this out. I'll start by stepping through the code and the expected output to make sure I understand what's happening. Then I'll select the correct answer choice.
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Francisca
12 months ago
Okay, I think I've got this. The `deque` is being sorted, while the `set` is using the natural ordering of the `B` objects. So the `binary_search` calls should return different results for the two containers. I'll double-check my understanding before answering.
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Kattie
12 months ago
Hmm, I'm a bit confused by the custom `B` class and how it's being used with the `set` and `deque`. I'll need to make sure I understand the comparison logic and how that affects the behavior of the `binary_search` calls.
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Lemuel
1 year ago
This looks like a tricky question involving some C++ data structures and algorithms. I'll need to carefully read through the code and understand how the `deque`, `set`, and `binary_search` functions are being used.
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Jesusa
1 year ago
I think I've got this. The key is that the Delete was partial, so the contact data that wasn't targeted - in non-sendable extensions and at the job level - would still exist in the account.
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Noel
1 year ago
Okay, I think I've got a good strategy here. I'll eliminate the options that don't seem to fit the context, then carefully consider the remaining choices to select the best answer.
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Tammara
1 year ago
I'm voting for option D, just to keep things interesting. After all, where's the fun in predictable answers? This is a certification exam, not a sleepy afternoon nap!
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Sue
1 year ago
User 3
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Keneth
1 year ago
User 2
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Mayra
1 year ago
User 1
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Naomi
1 year ago
I'm going to go with option B. It just makes the most sense to me. Although, if I'm being honest, I'm half-hoping for a compilation error, just to make things more interesting. That would really spice up my day!
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Margarett
1 year ago
I see your point, but I still think it's A. Set should find 4 with binary search.
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Mattie
1 year ago
I'm leaning towards D. Binary search in deque should return 1 for element found.
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Mignon
1 year ago
I agree with A. Set has unique elements, so binary search will find 4.
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Bobbye
1 year ago
I think it's A. Binary search in set returns 1 if element is found, 0 otherwise.
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Jonell
1 year ago
This is a good one! I bet the `deque` search returns 0 because the elements aren't sorted in the same order as the `set`. Gotta love those tricky data structure questions!
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Major
1 year ago
Wait, is this a trick question? The `binary_search` function returns 1 for true and 0 for false, so the output should be 1 1, right? Unless there's some hidden gotcha here...
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Martin
1 year ago
Hmm, looks like the program is trying to use the `B` class in a `set` and a `deque`. I'm guessing the comparison operators are implemented correctly, so the output should be pretty straightforward.
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Tonette
1 year ago
The program is comparing values in set and deque, so the output should be: A) 1 0
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Tonette
1 year ago
It will output: A) 1 0
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Vashti
1 year ago
I'm not sure, but I think the answer might be D because the first binary_search should return 0 since 4 is not in the set, but the second one should return 1 because 4 is in the deque.
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Raul
1 year ago
I agree with Jordan, the first binary_search should return 1 since 4 is in the set, but the second one should return 0 because 4 is not in the deque.
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Jordan
2 years ago
I think the answer is A because binary_search returns 1 if the element is found in the set, and 0 if not.
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