Quiz for Comments in C

Q1: Which symbol is used to start a single-line comment in C?

A. // B. /* C. # D. --

Q2: Which syntax is correct for a multi-line comment in C?

A. // comment B. /* comment */ C. # comment D. <!-- comment -->

Q3: Can comments be nested in C?

A. Yes B. No C. Only single-line comments can be nested D. Only multi-line comments can be nested

Q4: Which of the following is ignored by the compiler?

A. Variables B. Functions C. Comments D. Keywords

Q5: Which type of comments were introduced in C99?

A. Multi-line comments B. Single-line // comments C. # comments D. No new comment type

Q6: What is the main purpose of comments in code?

A. To increase code size B. To explain code for readability C. To speed up execution D. To compile faster

Q7: Which of the following is a valid comment in C?

A. /* This is a comment */ B. <!-- comment --> C. # This is a comment D. -- comment

Q8: What happens if you place a comment inside another comment?

A. It works fine B. Compiler error C. It is ignored D. It becomes a string

Q9: Can comments be placed at the end of a line of code?

A. Yes B. No C. Only in multi-line D. Only in preprocessor directives

Q10: Which is NOT a valid way to write a comment in C?

A. // comment B. /* comment */ C. ** comment ** D. /* multi-line */

Q11: Do comments affect the execution speed of a program?

A. Yes B. No C. Only in large programs D. Only in loops

Q12: Can comments span multiple lines?

A. Yes, with /* */ B. No C. Only with // D. Only in macros

Q13: Which of these is best practice for writing comments?

A. Explaining obvious code B. Explaining complex logic C. Writing in capital letters D. Avoiding comments entirely

Q14: Can a comment be empty?

A. Yes B. No C. Only single-line comments D. Only multi-line comments

Q15: Which comment style is processed faster?

A. // B. /* */ C. Both same D. Neither

Q16: Are comments part of the program's binary?

A. Yes B. No C. Only single-line comments D. Only multi-line comments

Q17: What happens if you forget to close a multi-line comment?

A. It compiles fine B. Compiler error C. Warning only D. It ignores the rest of file

Q18: Which type of comment is better for temporarily disabling code?

A. // B. /* */ C. Both D. None

Q19: Can comments be used inside macros?

A. Yes B. No C. Only // D. Only /* */

Q20: Is it good practice to overuse comments?

A. Yes B. No C. Depends on project size D. Only for beginners