Algorithms STL Mcq- What is the correct answer?

#1

Q8. Algorithms STL#8
Study the following code snippet:

vector< int > data = {100, 142, 138, 96, 32, 149};
swap(data[2], data[5]);
int val1 = *max_element(data.begin(), data.begin() +3);
int val2 = *max_element(data.begin()+3,data.end());
cout<< min(val1, val2);
Will the above code compile? If yes then what is the output?

swap is not a defined function so an error is thrown.

output is 142, no error is thrown.

max_element is not a defined function so an error is thrown.

output is 138, no error is thrown.

Why is the answer d and not c

#2

after swapping the vector becomes
100 142 149 96 32 138

int val1 = *max_element(data.begin(), data.begin() +3);

val1 will be 149

int val2 = *max_element(data.begin()+3,data.end());
val2 will be 138

so min(149,138) will be 138
hence ans is d

NOTE
max_element
Returns an iterator pointing to the element with the largest value in the range [first,last)
last not included .

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#3

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#4

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