MCQOPTIONS
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MCQOPTIONS
This section includes 84 Mcqs, each offering curated multiple-choice questions to sharpen your Functions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Is initialization mandatory for local static variables? |
| A. | YES |
| B. | NO |
| C. | Depends on the compiler |
| D. | Depends on the standard |
| Answer» C. Depends on the compiler | |
| 2. |
What is the format identifier for static a = 20.5; ? |
| A. | %s |
| B. | %d |
| C. | %f |
| D. | Illegal declaration due to absence of data type |
| Answer» C. %f | |
| 3. |
Functions have static qualifier for its declaration by default. |
| A. | true |
| B. | false |
| C. | Depends on the compiler |
| D. | Depends on the standard |
| Answer» C. Depends on the compiler | |
| 4. |
What is the scope of a function? |
| A. | Whole source file in which it is defined |
| B. | From the point of declaration to the end of the file in which it is defined |
| C. | Any source file in a program |
| D. | From the point of declaration to the end of the file being compiled |
| Answer» E. | |
| 5. |
What is the scope of an external variable? |
| A. | Whole source file in which it is defined |
| B. | From the point of declaration to the end of the file in which it is defined |
| C. | Any source file in a program |
| D. | From the point of declaration to the end of the file being compiled |
| Answer» E. | |
| 6. |
The variable declaration with no storage class specified is by default: |
| A. | auto |
| B. | extern |
| C. | static |
| D. | register |
| Answer» B. extern | |
| 7. |
Automatic variables are variables that are? |
| A. | |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» B. B. | |
| 8. |
What linkage does automatic variables have? |
| A. | Internal linkage |
| B. | External linkage |
| C. | No linkage |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 9. |
What is the output of this C code? int main() { auto i = 10; const auto int *p = &i; printf("%d n", i); } |
| A. | 10 |
| B. | Compile time error |
| C. | Depends on the standard |
| D. | Depends on the compiler |
| Answer» B. Compile time error | |
| 10. |
Automatic variables are stored in: |
| A. | stack |
| B. | data segment |
| C. | register |
| D. | heap |
| Answer» B. data segment | |
| 11. |
Default storage class if not any is specified for a local variable, is auto: |
| A. | true |
| B. | false |
| C. | Depends on the standard |
| D. | None of the mentioned |
| Answer» B. false | |
| 12. |
Which of the following is a storage specifier? |
| A. | enum |
| B. | union |
| C. | auto |
| D. | volatile |
| Answer» D. volatile | |
| 13. |
Automatic variables are allocated space in the form of a: |
| A. | stack |
| B. | queue |
| C. | priority queue |
| D. | random |
| Answer» B. queue | |
| 14. |
The scope of an automatic variable is: |
| A. | Within the block it appears |
| B. | Within the blocks of the block it appears |
| C. | Until the end of program |
| D. | Both (a) and (b) |
| Answer» E. | |
| 15. |
Which of the following cannot be static in C? |
| A. | Variables |
| B. | Functions |
| C. | Structures |
| D. | None of the mentioned |
| Answer» E. | |
| 16. |
Which of the following storage class supports char data type? |
| A. | register |
| B. | static |
| C. | auto |
| D. | All of the mentioned |
| Answer» E. | |
| 17. |
Automatic variables are initialized to? |
| A. | Junk value |
| B. | Nothing |
| C. | Both (a) & (b) |
| Answer» C. Both (a) & (b) | |
| 18. |
Automatic variables are allocated memory in? |
| A. | heap |
| B. | Data segment |
| C. | Code segment |
| D. | stack |
| Answer» E. | |
| 19. |
What is the output of this C code? void main() { int x; } here x is? |
| A. | automatic variable |
| B. | static variable |
| C. | global variable |
| D. | register variable |
| Answer» B. static variable | |
| 20. |
Automatic variables: |
| A. | Exist only within that scope in which it is declared |
| B. | Cease to exist after the block is exited |
| C. | Only 1 |
| D. | Both (a) & (b) |
| Answer» E. | |
| 21. |
Which of following is not accepted in C? |
| A. | |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» D. D. | |
| 22. |
Assignment statements assigning value to local static variables are executed only once? |
| A. | true |
| B. | false |
| C. | Depends on the code |
| D. | None of the mentioned |
| Answer» C. Depends on the code | |
| 23. |
Which of the following is true for static variable? |
| A. | It can be called from another function. |
| B. | It exists even after the function ends. |
| C. | It can be modified in another function by sending it as a parameter. |
| D. | |
| Answer» D. | |
| 24. |
What is the output of this C code? void main() { m(); m(); } void m() { static int x = 5; x++; printf("%d", x); } |
| A. | 6 7 |
| B. | 6 6 |
| C. | |
| D. | D. |
| Answer» B. 6 6 | |
| 25. |
What is the output of this C code? int x = 5; void main() { int x = 3; m(); printf("%d", x); } void m() { x = 8; n(); } void n() { printf("%d", x); } |
| A. | 8 3 |
| B. | 8 5 |
| C. | 3 8 |
| D. | 5 3 |
| Answer» B. 8 5 | |
| 26. |
Array sizes are optional during array declaration by using ______ keyword. |
| A. | auto |
| B. | static |
| C. | extern |
| D. | register |
| Answer» D. register | |
| 27. |
What is the output of this C code? void main() { int x = 3; { x = 4; printf("%d", x); } } |
| A. | 4 |
| B. | 3 |
| C. | Undefined |
| Answer» B. 3 | |
| 28. |
Functions in C are ALWAYS: |
| A. | Internal |
| B. | External |
| C. | Both Internal and External |
| D. | External and Internal are not valid terms for functions |
| Answer» C. Both Internal and External | |
| 29. |
What is the output of this C code? void main() { static int x = 3; x++; if (x <= 5) { printf("hi"); main(); } } |
| A. | Run time error |
| B. | hi |
| C. | infinite hi |
| D. | hi hi |
| Answer» E. | |
| 30. |
What is the output of this C code? void main() { m(); } void m() { printf("hi"); m(); } |
| A. | Compile time error |
| B. | hi |
| C. | Infinite hi |
| D. | Nothing |
| Answer» D. Nothing | |
| 31. |
What is the output of this C code? static int x; void main() { int x; printf("x is %d", x); } |
| A. | Junk value |
| B. | Run time error |
| C. | Nothing |
| Answer» C. Nothing | |
| 32. |
Global variables are: |
| A. | Internal |
| B. | External |
| C. | Both (a) and (b) |
| D. | None of the mentioned. |
| Answer» C. Both (a) and (b) | |
| 33. |
Which of the following are an external variable? int func (int a) { int b; return b; } int main() { int c; func (c); } int d; |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» E. | |
| 34. |
What is the output of this C code? int x = 5; void main() { int x = 3; printf("%d", x); { int x = 4; } printf("%d", x); } |
| A. | 3 3 |
| B. | 3 4 |
| C. | 3 5 |
| D. | Run time error |
| Answer» B. 3 4 | |
| 35. |
What is the output of this C code? int x = 5; void main() { int x = 3; printf("%d", x); { x = 4; } printf("%d", x); } |
| A. | Run time error |
| B. | 3 3 |
| C. | 3 5 |
| D. | 3 4 |
| Answer» E. | |
| 36. |
What is the output of this C code? int x; void main() { printf("%d", x); } |
| A. | Junk value |
| B. | Run time error |
| C. | Undefined |
| Answer» A. Junk value | |
| 37. |
What is the output of code given below? enum m{JAN, FEB, MAR}; enum m foo(); int main() { enum m i = foo(); printf("%d n", i); } int foo() { return JAN; } |
| A. | Compile time error |
| B. | Depends on the compiler |
| C. | Depends on the standard |
| Answer» B. Depends on the compiler | |
| 38. |
What is the output of this C code? void main() { m(); printf("%d", x); } int x; void m() { x = 4; } |
| A. | 4 |
| B. | Compile time error |
| C. | Undefined |
| Answer» C. Undefined | |
| 39. |
What will be the output? int main() { printf("%d", d++); } int d = 10; |
| A. | 9 |
| B. | 10 |
| C. | 11 |
| D. | Compile time error |
| Answer» E. | |
| 40. |
What will be the output? double var = 8; int main() { int var = 5; printf("%d", var); } |
| A. | 5 |
| B. | 8 |
| C. | Compile time error due to wrong format identifier for double |
| D. | Compile time error due to redeclaration of variable with same name |
| Answer» B. 8 | |
| 41. |
What is the output of this C code? void main() { static int x; printf("x is %d", x); } |
| A. | 1 |
| B. | Junk value |
| C. | Run time error |
| Answer» A. 1 | |
| 42. |
What is the output of this C code? void main() { m(); m(); } void m() { static int x = 5; x++; printf("%d", x); } |
| A. | 6 7 |
| B. | 6 6 |
| C. | 5 5 |
| D. | 5 6 |
| Answer» B. 6 6 | |
| 43. |
What is the output of this C code? static int x = 5; void main() { x = 9; { int x = 4; } printf("%d", x); } |
| A. | 9 |
| B. | 4 |
| C. | 5 |
| Answer» B. 4 | |
| 44. |
What is the output of this C code? int *i; int main() { if (i == NULL) printf("true n"); return 0; } |
| A. | true |
| B. | true only if NULL value is 0 |
| C. | Compile time error |
| D. | Nothing |
| Answer» B. true only if NULL value is 0 | |
| 45. |
Property of external variable to be accessed by any source file is called by C90 standard as: |
| A. | |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» B. B. | |
| 46. |
Can variable i be accessed by functions in another source file? int i; int main() { printf("%d n", i); } |
| A. | false |
| B. | Only if static keyword is used |
| C. | Depends on the type of the variable |
| Answer» A. false | |
| 47. |
Which part of the program address space is p stored in the code given below? int *p; int main() { int i = 0; p = &i; return 0; } |
| A. | Code/text segment |
| B. | Data segment |
| C. | Bss segment |
| D. | Stack |
| Answer» D. Stack | |
| 48. |
Which part of the program address space is p stored in the code given below? int *p = NULL; int main() { int i = 0; p = &i; return 0; } |
| A. | Code/text segment |
| B. | Data segment |
| C. | Bss segment |
| D. | Stack |
| Answer» C. Bss segment | |
| 49. |
What is the output of this C code? double i; int main() { printf("%g n",i); return 0; } |
| A. | 0.000000 |
| B. | Garbage value |
| C. | Depends on the compiler |
| Answer» C. Depends on the compiler | |
| 50. |
functions can return enumeration constants in c? |
| A. | true |
| B. | false |
| C. | depends on the compiler |
| D. | depends on the standard |
| Answer» B. false | |