Practice string Quizzes
Boost your knowledge of string with DevBrainiac's interactive quizzes that make learning faster and more effective. Each quiz focuses on real-world concepts, helping you improve accuracy, understand fundamentals and prepare better for technical interviews. Suitable for beginners and professionals alike, our string quizzes offer a focused, practical approach to mastering the topic.
Explore All string Quizzes
Learn string step by step with interactive quizzes designed for beginners and learners revising key concepts. Build a strong foundation with clear, structured practice in string.
Question 1
Which function is used to concatenate two strings in C?
1
strcat()
2
strcpy()
3
strcmp()
4
strlen()
Question 2
What will be the output of the following C++ code?
#include <iostream>
#include <string>
#include <cstring>
using namespace std;
int main(int argc, char const *argv[])
{
string a = "Hello\0World";
cout<<a;
return 0;
}1
Hello World
2
World
3
Hello
4
Error
Question 3
What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string str ("Sanfoundry");
for (size_t i = 0; i < str.length();)
{
cout << str.at(i-1);
}
return 0;
}1
Sanfoundry
2
Sanfoundr
3
runtime error
4
anfoundry
Question 4
What will happen if you call ToString() on a null object in C#?
1
It throws a NullReferenceException
2
It returns "null"
3
It depends on the object's type
4
It returns an empty string
Question 5
In JavaScript, which method is used to get the Unicode of a character?
1
asciiCodeAt()
2
codeAt()
3
charCodeAt()
4
getCode()
Question 6
What is the value of '1' + 1 in JavaScript?
1
11
2
2
3
TypeError
4
NaN
Question 7
What will be the output of 'A' + 1 in Python?
1
66
2
A1
3
TypeError
4
B
Question 8
What is the output of the following Java program?
System.out.println('A' + 1);1
66
2
B
3
A1
4
Compilation Error
Question 9
What will be the output of following Java Code?
public class Test {
public static void main(String[] args) {
String a = "hello";
String b = new String("hello");
System.out.println(a == b);
}
}1
false
2
true
3
Compilation Error
4
Runtime Error
Question 10
What will be the output of following Java Code?
public class Test {
public static void main(String[] args) {
String a = "hello";
String b = "hello";
System.out.println(a == b);
}
}1
true
2
Compilation Error
3
Runtime Error
4
false
Question 11
What will be the output of following Java Code?
public class Test {
public static void main(String[] args) {
int x = 5;
System.out.println(x++ + ++x);
}
}1
11
2
12
3
13
4
10
Question 12
What will be the output of following Java Code?
public class Test {
public static void main(String[] args) {
String s = "abc";
s.concat("def");
System.out.println(s);
}
}1
def
2
abc
3
Compilation Error
4
abcdef
Question 13
Can a switch work with strings in C#?
1
no
2
yes
3
Only in .NET Core
4
Only with enums
Question 14
What will be the output of this code?
String str = "Java" + 10 + 20; System.out.println(str);
1
Java30
2
Java1020
3
Compilation Error
4
Java 30
Question 15
Which method is used to compare two strings ignoring case in Java?
1
equals()
2
compareTo()
3
equalsIgnoreCase()
4
compareToIgnoreCase()
Question 16
What is the output of this code snippet?
String str1 = "Java"; String str2 = "Ja" + "va"; System.out.println(str1 == str2);
1
Runtime Error
2
false
3
Compilation Error
4
true
Question 17
What is the output of the following Python code?
s = "Python" s[0] = 'p' print(s)
1
Error
2
Python
3
ython
4
python
Question 18
What will be the output of this code snippet?
text = "abracadabra"
print(text.find('a'), text.rfind('a'))1
0 0
2
0 10
3
1 10
4
10 0
Question 19
Which method would you use to convert the first character of each word in a string to uppercase and the rest to lowercase?
1
capitalize()
2
title()
3
lower()
4
upper()
Question 20
What is the output of the following code?
s = "Hello\nWorld"
print(r"{}".format(s))1
Hello World
2
Hello\nWorld (literally)
3
Hello\nWorld
4
Error
Question 21
What will be the output of this snippet?
s = "abc" * 3 print(s)
1
abc abc abc
2
abc3
3
Error
4
abcabcabc