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Title: Buy Latest Dec 29, 2022 CPP Exam Q&A PDF - One Year Free Update [Q126-Q149]

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NO.126 What happens when you attempt to compile and run the following code?# include <iostream># include <set># include <vector>using namespace std;int main(){int myints[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };vector<int>v(myints, myints+10);set<int> s1(v.begin(),v.end());s1.insert(v.begin(),v.end());s1.erase(s1.lower_bound(2),s1.upper_bound(7));for(set<int>::iterator i=s1.begin();i!= s1.end(); i++) {cout<<*i<<” “;}return 0;}
 program outputs: 0 1 8 9
 program outputs: 2 3 4 5 6 7
 program outputs: 1 6 5 7
 program outputs: 3 4 9 8 0
NO.127 What will happen when you attempt to compile and run the following code?# include <iostream># include <set># include <vector>using namespace std;int main(){int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };vector<int>v(t, t+10);set<int> s1(v.begin(),v.end());s1.insert(v.begin(),v.end());pair<set<int>::iterator,set<int>::iterator> range;range = s1.equal_range(6);cout<<*range.first<<” “<<*range.second<<endl;return 0;}The output will be:
 6 6
 5 7
 6 7
 1 5
 6 5
NO.128 What happens when you attempt to compile and run the following code?# include <iostream># include <deque># include <list># include <stack># include <vector>using namespace std;int main(){deque<int> mydeck;list<int> mylist; vector<int> myvector;stack<int> first;stack<int> second(mydeck);stack<int> third(second);stack<int, list<int> > fourth(mylist);fourth.push(10);fourth.push(11);fourth.push(12);stack<int, vector<int> > fifth(myvector);fifth.push(10);fifth.push(11);fifth.push(12);while(!fifth.empty()){cout<<fifth.top()<<” “;fifth.pop();}while (!fourth.empty()){cout << fourth.front() << ” “;fourth.pop();}return 0;}
 program outputs: 12 11 10 12 11 10
 compilation error
 program outputs: 10 11 12 10 11 12
 runtime exception
NO.129 What happens when you attempt to compile and run the following code?#include <deque>#include <iostream>#include <algorithm>#include <set>using namespace std;template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<” “; } };int main() {int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};int t1[]={1,2,3,4};deque<int> d1(t, t+10);set<int> s1(t, t+10);sort(d1.begin(), d1.end());cout<<includes(s1.begin(),s1.end(), t1,t1+4)<<” “<<includes(d1.begin(),d1.end(), t1,t1+4)<<endl;return 0;}Program outputs:
 1 1
 1 0
 0 1
 0 0
NO.130 What happens when you attempt to compile and run the following code?# include <iostream># include <iomanip>using namespace std;int main (){float f = 10.126;cout<<f<<” “<<setprecision(2)<<f<<endl;return 0;}Program outputs:
 10.126 10
 10.126 10.12
 compilation error
 10.126 10.13
NO.131 What happens when you attempt to compile and run the following code?#include <iostream>#include <algorithm>#include <vector>using namespace std;void myfunction(int i) {cout << ” ” << i;}int main() {int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };vector<int> v1(t, t + 10);copy_backward(t, t+10, v1.rend());for_each(v1.begin(), v1.end(), myfunction);return 0;}Program outputs:
 10 5 9 6 2 4 7 8 3 1
 1 3 8 7 4 2 6 9 5 10 10 5 9 6 2 4 7 8 3 1
 1 3 8 7 4 2 6 9 5 10
 runtime exception/segmentation fault
 compilation error
NO.132 What happens when you attempt to compile and run the following code?#include <iostream>using namespace std;int main(){cout.setf(ios::oct, ios::basefield);cout<<100<<” “;cout.setf(ios::showbase);cout<<100<<” “;return 0;}Program outputs:
 144 0144
 144 0x64
 0x144 0144
 0144 100
 compilation error
NO.133 What happens when you attempt to compile and run the following code?#include <iostream>#include <map>#include <vector>#include <string>using namespace std;int main(){int second[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };string first[] = {“three”, “four”, “two”, “one”, “six”,”five”, “seven”, “nine”,”eight”,”zero”}; map<int,string> m; for(int i=0; i<10; i++) { m.insert(pair<int,string>(second[i],first[i]));}m[0]=”ten”;m.insert(pair<int,string>(1,”eleven”));for(map<int, string>::iterator i=m.begin();i!= m.end(); i++) {cout<<i?>second<<” “;}return 0;}
 program outputs: zero one two three four five six seven eight nine
 program outputs: ten one two three four five six seven eight nine
 program outputs: zero eleven two three four five six seven eight nine
 program outputs: ten eleven two three four five six seven eight nine
 program outputs: 0 1 2 3 4 5 6 7 8 9
NO.134 What happens when you attempt to compile and run the following code?#include <vector>#include <iostream>int main (){int t[]={1,2,3,4,5};std::vector<int>v1(t,t+5);std::vector<int>v2(v1);v1.resize(10);v2.reserve(10);std::vector<int>::iterator i = v1.begin();int ii = 0;while (i != v1.end()) { std::cout<<i[ii]<<” “;ii??;i++; }i = v2.begin();ii=0;while (i != v2.end()) { std::cout<<i[ii]<<” “;ii??;i++; }return 0;}
 program outputs 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 compilation error
 program outputs 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5
 program outputs 1 2 3 4 5 0 0 0 0 0 1 2 3 4 5 0 0 0 0 0
NO.135 Which are NOT valid instantiations of priority_queue object:# include <iostream># include <deque># include <list># include <queue># include <vector>using namespace std;int main(){deque<int> mydeck;list<int> mylist; vector<int> myvector;priority_queue<int> first;//line Ipriority_queue<int, deque<int> > second;//line IIpriority_queue<int> third(first);//line IIIpriority_queue<int, list<int> > fourth(third);//line IVpriority_queue<int, vector<int> > fifth(myvector.begin(), myvector.end());//line V return 0;}
 line I
 line II
 line III
 line IV
 line V
NO.136 What happens when you attempt to compile and run the following code?# include <iostream># include <map># include <vector># include <string>using namespace std;int main(){int second[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };string first[] = {“three”, “four”, “two”, “one”, “six”,”five”, “seven”, “nine”,”eight”,”zero”}; map<int,string> m;for(int i=0; i<10; i++) {m.insert(pair<int,string>(second[i],first[i]));}m[0]=”ten”;m.insert(pair<int,string>(1,”eleven”));for(map<int, string>::iterator i=m.begin();i!= m.end(); i++) {cout<<i?>second<<” “;}return 0;}
 program outputs: zero one two three four five six seven eight nine
 program outputs: ten one two three four five six seven eight nine
 program outputs: zero eleven two three four five six seven eight nine
 program outputs: ten eleven two three four five six seven eight nine
 program outputs: 0 1 2 3 4 5 6 7 8 9
NO.137 What happens when you attempt to compile and run the following code?# include <deque># include <set># include <iostream># include <algorithm>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<v.val;} }; ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;} template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<” “; } };int main() {int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};deque<B> d1(t, t+10);sort(d1.begin(), d1.end());set<B> s1(t,t+10);cout<<binary_search(s1.begin(),s1.end(), B(4))<<” “<<binary_search(d1.begin(),d1.end(),B(4))<<endl;return 0;}Program outputs:
 1 0
 1 1
 0 0
 0 1
 compilation error
NO.138 What happens when you attempt to compile and run the following code?#include <iostream>#include <algorithm>#include <map>using namespace std;int main() {int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };map<int, int> m;for(int i=0; i < 10; i++) {m[i]=t[i];}pair<const int,int> p(5,5);map<int, int>::iterator it = find(m.begin(), m.end(), p);if (it != m.end()){cout<<it?>first<<endl;}else{cout<<“Not found!n”;}return 0;}Program outputs:
 5
 Not found!
 10
 compilation error
NO.139 What will happen when you attempt to compile and run the following code?#include <iostream>using namespace std;template <typedef T>class A {T_v;public:A(T v): _v(v){}T getV() { return _v; }};int main(){A<int> a(1);cout << a.getV() <<endl;return 0;}
 program will display:1
 program will not compile
 program will compile
 program will cause runtime exception
NO.140 What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: true false<enter>?#include <iostream>#include <string>using namespace std;int main (){bool a,b;cin>>boolalpha>>a>>b;cout<<a<<b<<endl;return 0;}Program will output:
 truefalse
 true0;
 1false
 10
 none of these
NO.141 What happens when you attempt to compile and run the following code?#include <iostream>using namespace std;int main(){cout.setf(ios::hex, ios::basefield);cout<<100<<” “;cout.flags(ios::showbase);cout<<100<<” “;return 0;}Program outputs:
 64 64
 64 0x64
 0x64 0x64
 64 100
 compilation error
NO.142 What happens when you attempt to compile and run the following code?# include <vector># include <iostream># include <algorithm>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<v.val;} }; ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;} template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<” “; } };int main() {int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};vector<B> v1(t, t+10);sort(v1.begin(), v1.end());for_each(v1.begin(), v1.end(), Out<B>(cout));cout<<endl;return 0;}Program outputs:
 8 10 5 1 4 6 2 7 9 3
 1 2 3 4 5 6 7 8 9 10
 compilation error
 10 9 8 7 6 5 4 3 2 1
NO.143 What happens when you attempt to compile and run the following code?#include <iostream>#include <algorithm>#include <vector>using namespace std;void myfunction(int i) {cout << ” ” << i;}int main() {int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };vector<int> v1(t, t + 10);copy(t, t+10, v1.end());for_each(v1.begin(), v1.end(), myfunction);return 0;}Program outputs:
 10 5 9 6 2 4 7 8 3 1
 10 5 9 6 2 4 7 8 3 1 10 5 9 6 2 4 7 8 3 1
 compilation error
 runtime exception/segmentation fault
NO.144 What happens when you attempt to compile and run the following code?# include <vector># include <iostream># include <algorithm># include <functional>using namespace std;template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<” “; } };struct Add : public binary_function<int, int, int> {int operator() (const int & a, const int & b) const {return a+b;}};int main() {int t[]={1,2,3,4,5,6,7,8,9,10};vector<int> v1(t, t+10);vector<int> v2(10);transform(v1.begin(), v1.end(), v2.begin(), bind1st(Add(), 1));for_each(v2.rbegin(), v2.rend(), Out<int>(cout));cout<<endl;return 0;}Program outputs:
 1 2 3 4 5 6 7 8 9 10
 2 3 4 5 6 7 8 9 10 11
 10 9 8 7 6 5 4 3 2 1
 11 10 9 8 7 6 5 4 3 2
 compilation error
NO.145 What happens when you attempt to compile and run the following code?#include <vector>#include <iostream>#include <algorithm>using namespace std;template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator()(const T & val ) {out<<val<<” “;}};struct Sequence {int start;Sequence(int start):start(start){}int operator()() { return 10*(1+(start++ %3)); } };int main() {vector<int> v1(10);vector<int> v2(10);generate(v1.begin(), v1.end(), Sequence(1));sort(v1.rbegin(), v1.rend());unique_copy(v1.begin(),v1.end(), v2.begin());for_each(v2.begin(), v2.end(), Out<int>(cout) );cout<<endl;return 0;}Program outputs:
 20 30 10 20 30 10 20 30 10 20
 30 20 10 0 0 0 0 0 0 0
 30 0 0 0 0 0 0 0 20 10
 compilation error
NO.146 What happens when you attempt to compile and run the following code?#include <iostream>#include <set>#include <vector>using namespace std;int main(){int myints[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };vector<int>v(myints, myints+10);set<int> s1(v.begin(),v.end());set<int, greater<int> > s2(v.begin(), v.end());for(set<int>::iterator i=s1.begin();i!= s1.end(); i++) {cout<<*i<<” “;}for(set<int, greater<int> >::iterator i=s2.begin();i!= s2.end(); i++) { cout<<*i<<” “;}cout<<endl;return 0;}
 program outputs: 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
 program outputs: 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
 program outputs: 0 1 2 3 4 5 6 7 8 9 9 8 7 6 5 4 3 2 1 0
 program outputs: 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9
Explanation/Reference:NO.147 What happens when you attempt to compile and run the following code?#include <iostream>#include <algorithm>#include <vector># include <deque># include <set>using namespace std;void myfunction(int i) {cout << ” ” << i;}int main() {int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };vector<int> v1(t, t + 10);deque<int> d1(t, t + 10);set<int> s1(t, t + 10);for_each(v1.begin(), v1.end(), myfunction); // Line Ifor_each(d1.begin(), d1.end(), myfunction); // Line IIfor_each(s1.begin(), s1.end(), myfunction); // Line IIIreturn 0;}
 program outputs: 10 5 9 6 2 4 7 8 3 1 10 5 9 6 2 4 7 8 3 1 1 2 3 4 5 6 7 8 9 10
 program outputs: 10 5 9 6 2 4 7 8 3 1 10 5 9 6 2 4 7 8 3 1 10 5 9 6 2 4 7 8 3 1
 program outputs: 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10
 compilation error in line I
 compilation error in line III
NO.148 What happens when you attempt to compile and run the following code?# include <deque># include <iostream># include <algorithm>using namespace std;template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<” “; } };int main() {int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};deque<int> d1(t, t+10);sort(d1.begin(), d1.end());deque<int>::iterator it = upper_bound(d1.begin(), d1.end(), 4);for_each(it, d1.end(), Out<int>(cout));cout<<endl;return 0;}Program outputs:
 5 6 7 8 9 10
 4 5 6 7 8 9 10
 1 2 3 4 5 6 7 8 9 10
 1 2 3 4 5
 1 2 3 4
NO.149 What happens when you attempt to compile and run the following code?#include <deque>#include <iostream>#include <algorithm>#include <set>using namespace std;template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<” “; }};bool Compare(char a, char b) { return tolower(a) < tolower(b);}int main() {char s[]={“qwerty”};char t1[]={“ert”};char t2[]={“ERT”};sort(s, s+6);cout<<includes(s,s+6, t1,t1+3, Compare)<<” “<<includes(s,s+6, t2,t2+3, Compare)<<endl; return 0;}Program outputs:
 0 0
 0 1
 1 0
 1 1
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Post date: 2022-12-29 09:14:04

Post date GMT: 2022-12-29 09:14:04

Post modified date: 2022-12-29 09:14:04

Post modified date GMT: 2022-12-29 09:14:04