Quiz for switch-case

Q1: Which keyword is used to exit from a switch statement in C?

A. exit B. break C. continue D. stop

Q2: What happens if break is omitted in a switch case?

A. The program will terminate B. Only that case executes C. Execution falls through to the next case D. An error occurs

Q3: Which data type is not allowed in switch expression in C?

A. int B. float C. char D. enum

Q4: Which statement is optional in switch-case structure?

A. default B. case C. break D. switch

Q5: How many default cases can a switch statement have?

A. One B. Two C. As many as needed D. Zero

Q6: Can a switch statement be nested inside another switch?

A. Yes B. No C. Only two levels allowed D. Only with if-else

Q7: In C, switch expression must be of which type?

A. integer type only B. float only C. any type D. pointer

Q8: What is the default behavior if no case matches and there is no default?

A. Program terminates B. Control moves to next statement after switch C. Error D. Infinite loop

Q9: Where can the default case appear in a switch statement?

A. Only at the end B. Only at the start C. Anywhere D. Middle only

Q10: Can we use string in switch expression in C?

A. Yes B. No C. Only in C99 D. Only in C++

Q11: What will happen if two cases have the same value?

A. First case executes B. Compilation error C. Both execute D. Runtime error

Q12: Which is the correct syntax of a case label?

A. case value: B. case = value; C. case value; D. case: value

Q13: Which statement is best to jump out of a switch immediately?

A. goto B. break C. continue D. exit

Q14: Can a case value be a variable?

A. Yes B. No C. Only global variables D. Only static variables

Q15: Can we use logical operators in a case value?

A. Yes B. No C. Only && D. Only ||

Q16: Is break mandatory after each case?

A. Yes B. No C. Only in last case D. Only if default present

Q17: What is the purpose of default case in switch?

A. To terminate program B. To execute if no match found C. To reset variables D. To call break

Q18: Can we have expressions like case 1+2 in C?

A. Yes B. No C. Only in GCC D. Only in Turbo C

Q19: What happens if break is used in default?

A. Exits switch B. Skips remaining cases C. Both A and B D. Nothing

Q20: Which header is needed to use switch in C?

A. stdio.h B. stdlib.h C. No special header needed D. conio.h