Quiz: Understanding the "Hello, World!" Program in C
Quiz: Understanding the "Hello, World!" Program in C
This quiz covers the basic structure, syntax, and functionality of a "Hello, World!" program in C, and aims to test both fundamental and slightly advanced knowledge. The answers to this quiz are at the end of this blog post.
1. Basic Understanding
Q1: What is the purpose of the `#include <stdio.h>` line in a C program?
a) It starts the main function.
b) It includes the standard input-output library functions.
c) It prints the "Hello, World!" message.
d) It defines the main function.
Q2: What is the function of `int main()` in a C program?
a) It is the starting point of the program.
b) It includes the standard input-output library.
c) It prints the output to the screen.
d) It is used to declare variables.
Q3: What does the `printf` function do in C?
a) It performs arithmetic operations.
b) It includes library functions.
c) It outputs text to the console.
d) It starts the main function.
Q4: What is the correct syntax to print "Hello, World!" in C?
a) `print("Hello, World!");`
b) `echo "Hello, World!";`
c) `printf("Hello, World!");`
d) `println("Hello, World!");`
2. Code Analysis
Q5: Identify the error in the following code snippet:
(C Language)
#include <stdio.h>
void main() {
printf("Hello, World!\n");
return 0;
}
a) `#include <stdio.h>` is incorrect.
b) `void main()` should be `int main()`.
c) Missing semicolon after `printf("Hello, World!")`.
d) Both b and c.
Q6: What will be the output of the following code?
(C Language)
#include <stdio.h>
int main() {
printf("Hello, World!\n");
return 0;
}
a) Hello, World!
b) Hello, World!\n
c) Error
d) Nothing
Q7: What is the significance of `return 0;` in the main function?
a) It is used to print the output.
b) It indicates that the program has executed successfully.
c) It starts the execution of the program.
d) It includes the standard input-output library.
3. Advanced Questions
Q8: Which of the following is true about the main function in a C program?
a) A C program can have multiple main functions.
b) The main function is optional in a C program.
c) A C program must have exactly one main function.
d) The main function cannot return a value.
Q9: What will happen if you omit the `#include <stdio.h>` line in the Hello, World! program?
a) The program will still run correctly.
b) The program will not compile.
c) The program will compile but not run.
d) The program will run but not print anything.
Q10: Modify the following program to print "Hello, C Programming!" instead of "Hello, World!":
(C Language)
#include <stdio.h>
int main() {
printf("Hello, World!\n");
return 0;
}
Answer:
(C Language)
#include <stdio.h>
int main() {
printf("Hello, C Programming!\n");
return 0;
}
Answers
1. b) It includes the standard input-output library functions.
2. a) It is the starting point of the program.
3. c) It outputs text to the console.
4. c) `printf("Hello, World!");`
5. d) Both b and c.
6. a) Hello, World!
7. b) It indicates that the program has executed successfully.
8. c) A C program must have exactly one main function.
9. b) The program will not compile.
10. The correct source code is as follows:
(C Language)
#include <stdio.h>
int main() {
printf("Hello, C Programming!\n");
return 0;
}
Image: Tumisu from Pixabay
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