| Question | Answer |
| Converts lowercase letter to uppercase | toupper() |
| What is the output of the given program?
#include <iostream>
#include <ctype.h>
int main ()
{
int i=0;
char str[]="first line \n second line \n";
while (!iscntrl(str[i]))
{
putchar (str[i]);
i++;
}
r | first line |
| What is the output of the given program?
#include <cctype>
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
char str[] = "THIS IS A TEST";
for (int i=0; i<strlen(str); i++)
putchar(tolower | this is a test |
| Which of the following is a cstring function? | strcpy() |
| What is the output of the given program?
#include <iostream>
#include <ctype.h>
using namespace std;
int main ()
{
int i=0;
char str[]="hello world!\n";
char c;
while (str[i])
{
c=str[i];
if (islower(c | HELLO WORLD! |
| A function used to concatenate strings | strcat() |
| Returns true if character expression is either a letter or a digit otherwise false | isalnum () |
| Check if a character is blank | isblank() |
| Which of the following converts string to float? | stof |
| Which of the following function converts the string to an integer? | stoi |
| A header file that handles string in C++ | string |
| What is the output of the following program?
#include <string>
#include <iostream>
using namespace std;
int main()
{
string str;
cin>>str;
cout<<str;
return 0;
} | input provided by user |
| The sequence of contiguous characters in memory is called _____________ | Character strings |
| What is the identifier given to string class to declare string objects? | string |
| What is the output of the given program?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s = 'a';
cout<<s;
return 0;
} | a |
| It returns true if str is an empty string | str.empty(); |
| What is the output of the given program?
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str1 = "Hello ";
string str2 = "World";
cout << "";
return 0;
} | Blank output |
| Which of the following is correct? | char str[80]; |
| Check if a character is alphanumeric | isalnum() |
| It returns the lowercase version of a character expression: | tolower() |
| What is the output of the given program?
#include <iostream>
#include <ctype.h>
int main ()
{
int i=0;
char str[]="first line ";
return 0;
} | blank screen |
| Returns true provided character expression is a whitespace character, such as the blank or newline character, otherwise, returns false. | isspace() |
| What is the output of the given program?
#include <iostream>
#include <string>
#include <cmath>
using namespace std;
int main ()
{
string s ="79";
int n = stoi(s);
cout << n;
return 0;
} | 79 |
| If two strings are identical, then the strcmp() function returns: | 0 |
| The append operator is denoted by: | += |
| What is the output of the given program?
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str1 = "This is a test";
string str2 = "test";
cout << "Word is found at index " << str1.find(str2 | Word is found at index 10 |
| What is the output of the given program?
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str1 = "This is a test";
cout << str1.empty();
return 0;
} | 0 |
| What is the output of the following program?
#include <iostream>
#include <string>
using namespace std;
int main () {
string str1 = "Hello ";
string str2 = "World";
string str3;
str3 = str1.append(str2);
cout << s | Hello World |
| What is the header file for the string class? | #include <string> |
| What is the output of the following program?
#include <iostream>
#include <string>
using namespace std;
int main () {
string myString = "Hello";
myString[0] = 'J';
cout << myString;
return 0;
} | Jello |
| Compares up to num characters of the C string str1 to those of the C string str2 | strncmp() |
| Returns true if the provided character expression is a printing character other than whitespace, a digit, or a letter; otherwise returns false. | ispunct() |
| Returns true provided character expression is an uppercase letter otherwise it returns false | isupper() |
| Returns true if character expression is a digit 0 through 9 otherwise false | isdigit() |
| Which of the following is a ctype function? | isalpha () |
| Which of the following is used to read a line of input? | getline() |
| Which of the following function allows you to read on a character? | get() |
| Check the following program
#include <iostream>
#include <ctype.h>
using namespace std;
int main ()
{
int i;
char str[]="c3po...??";
i=0;
while (isalnum(str[i])) i++;
cout << "The first " << i << " characters are al | 5 |
| What is the output of the following program?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s1 = "Hello";
string s2 = "Programming";
cout<< s1 + " " + | Hello Programming! |
| What is the output of the following program?
#include <string>
#include <iostream>
using namespace std;
int main()
{
string x = "Bad ";
cout << x.append(Romance);
return 0;
} | Error |
| What is the output of the following program?
#include <string>
#include <iostream>
using namespace std;
int main()
{
string x = "Bad ";
cout << x.append("Liar");
return 0;
} | Bad Liar |
| If a = “$512” then a is a: | string |
| Which of the following operator can be used also in strings? | - |
