Discuss C++ Institute CPP Exam Topic 7 Question 78

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

#include

using namespace std;

int main() {

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

string s[] = { "one", "one", "two", "two", "three","three", "four", "four", "five", "five"};

multimap m;

for (int i = 0; i < 10; i++) {

m.insert(pair(t[i], s[i]));

}

if (m.count(3) == 2) {

m.erase(3);

}

for (multimap::iterator i = m.begin(); i != m.end(); i++) {

cout << i?>first << " ";

}

return 0;

}

Aprogram outputs: 1 2 3 4 5

Bprogram outputs: 1 2 4 5

Cprogram outputs: 1 1 2 2 3 4 4 5 5

Dprogram outputs: 1 1 2 2 4 4 5 5

Eprogram outputs: one two three four five

Suggested Answer: D

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24 comments · newest first

Clarinda 11 months ago

I agree with the output being 1 1 2 2 4 4 5 5!

Sheridan 11 months ago

Wait, are you sure it doesn't include 3 at all?

Dorothy 11 months ago

Definitely outputs 1 1 2 2 4 4 5 5!

Carmelina 11 months ago

I think it should be 1 2 4 5 instead.

Therese 11 months ago

The program will output 1 1 2 2 4 4 5 5.

Samira 12 months ago

I think the output should exclude the 3, but I'm confused about whether it will still show the duplicates for other numbers.

Therese 12 months ago

This seems similar to a practice question we did, but I can't recall if it was about counting or erasing.

Cordelia 12 months ago

I’m not sure, but I think the erase function will remove all entries with the key 3, right?

Scot 1 year ago

I remember that multimap allows duplicate keys, so the count function should return 2 for key 3.

Kati 1 year ago

I'm not sure I fully understand what's happening with the erase operation on the multimap. I'll need to walk through it carefully to make sure I get the right answer.

Javier 1 year ago

I'm feeling pretty confident about this one. The output should be the unique keys in the multimap after the erase operation, which is 1, 2, 4, 5.

Glory 1 year ago

Okay, I think I've got this. The key is understanding how the multimap stores duplicate keys and how the erase operation removes all instances of a given key.

Gracia 1 year ago

Hmm, I'm a bit confused by the use of the multimap here. I'll need to review how that data structure works and how the insert and erase operations affect the output.

Lorrie 1 year ago

This looks like a tricky one. I'll need to carefully step through the code and think about how the multimap is being used.

Lynelle 1 year ago

Ah, I've seen these types of questions before. The key is to focus on the details in the URIs and match them to the threat kill chain stages. I'm confident I can get this one right.

Aide 1 year ago

This is a tricky one. I'm leaning towards option D, using a custom script to convert the nulls. That way I can make sure I'm handling them exactly as the question specifies, without potentially messing up the data format. It might take a bit more work, but I think it's the safest approach.

Laticia 1 year ago

Hmm, I'm a little unsure about this one. I'll have to think it through carefully before answering.

Noel 1 year ago

Okay, let's see here. The key seems to be understanding how the backup process is supposed to work and what could be causing the failure. I'll need to consider each of the answer choices carefully.

Matthew 1 year ago

Okay, I've got this. Option B is the clear winner here. Listening to the views of a wide range of employees, including those on the factory floor, shows real respect for people at all levels of the organization. That's exactly the kind of behavior the question is looking for.

Raina 1 year ago

I'm a bit confused here, I feel like I've seen a question about AES using a 168-bit key, but that doesn't seem right.

Arlette 2 years ago

I agree with Eleonore, I think the answer is: 1 2 4 5 because the program removes one occurrence of value 3.

Eleonore 2 years ago

I'm not so sure, but I think the output could be: 1 2 4 5 since the value 3 is erased from the multimap.

Joanna 2 years ago

I believe the correct output is: 1 2 3 4 5 because there are 2 occurrences of value 3 in the multimap.

Ettie 2 years ago

I think the program might output: 1 2 3 4 5.

C++ Institute CPP Exam - Topic 7 Question 78 Discussion