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MCQOPTIONS
This section includes 81 Mcqs, each offering curated multiple-choice questions to sharpen your C Constants knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The difference between x and x is? |
| A. | The first one refers to a variable whose identifier is x and the second one refers to the character constant x |
| B. | The first one is a character constant x and the second one is the string literal x |
| C. | Both are same |
| D. | Both are string literal |
| Answer» B. The first one is a character constant x and the second one is the string literal x | |
| 2. |
How to declare a wide character in the string literal? |
| A. | L prefix |
| B. | l prefix |
| C. | W prefix |
| D. | Z prefix |
| Answer» B. l prefix | |
| 3. |
Regarding the following statement which of the statements is true? const int a = 100; |
| A. | Declares a variable a with 100 as its initial value |
| B. | Declares a construction a with 100 as its initial value |
| C. | Declares a constant a whose value will be 100 |
| D. | Constructs an integer type variable with an as identifier and 100 as the value |
| Answer» D. Constructs an integer type variable with an as identifier and 100 as the value | |
| 4. |
Which of the following statement is not true about preprocessor directives? |
| A. | These are lines read and processed by the preprocessor |
| B. | They do not produce any code by themselves |
| C. | These must be written on their own line |
| D. | They end with a semicolon |
| Answer» E. | |
| 5. |
What will be the output of the following C++ code? #include using namespace std; int main() { int const p = 5; cout << ++p; return 0; } |
| A. | 5 |
| B. | 6 |
| C. | Error |
| D. | 8 |
| Answer» D. 8 | |
| 6. |
How are the constants declared? |
| A. | const keyword |
| B. | #define preprocessor |
| C. | both const keyword and #define preprocessor |
| D. | $define |
| Answer» D. $define | |
| 7. |
In case of ordinary int variables |
| A. | leftmost bit is reserved for sign |
| B. | rightmost bit is reserved for sign |
| C. | no bit is reserved for sign |
| D. | none of these |
| Answer» B. rightmost bit is reserved for sign | |
| 8. |
What is the output of this C code? int main() { enum {ORANGE = 12, MANGO, BANANA = 11, APPLE}; printf("APPLE = %d n", APPLE); } |
| A. | APPLE= 11 |
| B. | APPLE= 12 |
| C. | APPLE= 23 |
| D. | APPLE= 0 |
| Answer» C. APPLE= 23 | |
| 9. |
What is the output of this C code? int main() { printf("C programming %s", "Class by n%s AllIndiaExams", "SUPER"); } |
| A. | C programming Class by SUPER AllIndiaExams |
| B. | C programming Class by n%s AllIndiaExams |
| C. | C programming Class by %s AllIndiaExams |
| D. | Compilation error |
| Answer» D. Compilation error | |
| 10. |
For the following code snippet: char *str = AllIndiaExams.in 0? training classes ; The character pointer str holds reference to string: |
| A. | AllIndiaExams.in |
| B. | AllIndiaExams.in training classes |
| C. | AllIndiaExams.in 0training classes |
| D. | Syntax error |
| Answer» D. Syntax error | |
| 11. |
What is the output of this C code? #include #include int main() { char *str = "x"; char c = 'x'; char ary[1]; ary[0] = c; printf("%d %d", strlen(str), strlen(ary)); return 0; } |
| A. | 1 1 |
| B. | 2 1 |
| C. | 2 2 |
| D. | 1 (undefined value) |
| Answer» E. | |
| 12. |
What is the output of this C code? #include enum birds {SPARROW, PEACOCK, PARROT}; enum animals {TIGER = 8, LION, RABBIT, ZEBRA}; int main() { enum birds m = TIGER; int k; k = m; printf("%d n", k); return 0; } |
| A. | Compile time error |
| B. | 1 |
| C. | 8 |
| Answer» E. | |
| 13. |
What is the output of this C code? #include #define MAX 2 enum bird {SPARROW = MAX + 1, PARROT = SPARROW + MAX}; int main() { enum bird b = PARROT; printf("%d n", b); return 0; } |
| A. | Compilation error |
| B. | 5 |
| C. | Undefined value |
| D. | 2 |
| Answer» C. Undefined value | |
| 14. |
What is the output of this C code? #include int main() { int var = 010; printf("%d", var); } |
| A. | 2 |
| B. | 8 |
| C. | 9 |
| D. | 10 |
| Answer» C. 9 | |
| 15. |
What is the output of the following 'C' program? main { extern int i; i = 20; print("%d",size of (i)); } |
| A. | 2 |
| B. | 8 |
| C. | Would vary compiler to cimpiler |
| D. | Error |
| Answer» E. | |
| 16. |
_______not a primary constant. |
| A. | Integer Constant |
| B. | Real constant |
| C. | Character constant |
| D. | Enum constant |
| Answer» E. | |
| 17. |
The C declaration int b [100]; reserves ____________ successive memory locations,each large enough to contain single integer. |
| A. | 200 |
| B. | 10,000 |
| C. | 100 |
| D. | 10 |
| Answer» D. 10 | |
| 18. |
If a is an unsigned integer variable whose value is hx6db7, what is the value of -a? |
| A. | h llhhhhl |
| B. | hxhhl |
| C. | hx248 |
| D. | hx9248 |
| Answer» E. | |
| 19. |
Consider the following statement #define hypotenuse (a, b) sqrt (a*a + b*b); The macro-call hypotenuse (a + 2, b + 3); |
| A. | finds hypotenuse of triangle with sides a + 2 and b+3 |
| B. | finds square root of (a + 2)2 + (b + 3)2 |
| C. | is meaningless |
| D. | finds square root of 3*a + 4*b + 5 |
| Answer» E. | |
| 20. |
The rule for implicit type conversion in 'C' is |
| A. | int < unsigned < float < double |
| B. | unsigned < int < float < double |
| C. | int < unsigned> |
| D. | unsigned < int < double < float |
| Answer» B. unsigned < int < float < double | |
| 21. |
The declarations typedef float hight [100]; height men, women; |
| A. | define men and women as 100 element floating point arrays |
| B. | define men and women as floating point variables |
| C. | define height, men and women as floating point variables |
| D. | are illegal |
| Answer» B. define men and women as floating point variables | |
| 22. |
The variables which can be accessed by all modules in a program, are called |
| A. | local variables |
| B. | internal variables |
| C. | external variable |
| D. | global variables |
| Answer» E. | |
| 23. |
A static variable |
| A. | cannot be initialized |
| B. | is initialized once at the commencement of execution and cannot be changed at run time |
| C. | retains its value throughout the file of the program |
| D. | is same as an automatic variable but is placed at the head of a program |
| Answer» D. is same as an automatic variable but is placed at the head of a program | |
| 24. |
The statement # include < math.h> is written at the top of a program to indicate |
| A. | beginning of the program |
| B. | beginning of the program |
| C. | that certain information about mathematical library functions are to be included at the begnning of the program |
| D. | none of these |
| Answer» D. none of these | |
| 25. |
Constants in C can be divided into categories ? |
| A. | 3 |
| B. | 6 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 26. |
C programming language by itself provides |
| A. | input facility |
| B. | output facility |
| C. | both input and output facilities |
| D. | no input and output facilities |
| Answer» E. | |
| 27. |
C programming language provides operations which deal directly with objects such as |
| A. | strings and sets |
| B. | lists and arrays |
| C. | characters, integers, and floating point numbers |
| D. | all of these |
| Answer» D. all of these | |
| 28. |
In C programming language, if the first and the second operands of operator + are of types int and float, respectively, the result will be of type |
| A. | int |
| B. | float |
| C. | char |
| D. | long int |
| Answer» C. char | |
| 29. |
The value of ab if ab & 0 x 3f equals 0 x 27 is |
| A. | 047 |
| B. | 0 x 0 f |
| C. | 0 x f3 |
| D. | 0 x 27 |
| Answer» E. | |
| 30. |
If the declaration unsigned c:5; is replaced by unsigned : 6; then |
| A. | it results in a syntax error |
| B. | it is meaningless |
| C. | compiler will give a new name for the field |
| D. | none of these |
| Answer» D. none of these | |
| 31. |
int i = 5; is a statement in a C program. |
| A. | during execution, value of i may change but not its address |
| B. | during execution both the address and value may change |
| C. | repeated execution may result in different addresses for i |
| D. | i may not have an associated address |
| Answer» D. i may not have an associated address | |
| 32. |
Printing a character as an integer |
| A. | results in the printing of a negative integer |
| B. | always prints a positive integer |
| C. | prints a value that is implementation dependent |
| D. | none of these |
| Answer» D. none of these | |
| 33. |
The program fragment int i = 263 ; putchar (i) ; prints |
| A. | 263 |
| B. | ASCII equivalent of 263 |
| C. | rings the bell |
| D. | garbage |
| Answer» D. garbage | |
| 34. |
Which of the following 'C' type is not a primitive data structure? |
| A. | int |
| B. | float |
| C. | char |
| D. | none of these |
| Answer» E. | |
| 35. |
The declaration "unsigned u" indicates u is a/an |
| A. | unsigned character |
| B. | unsigned integer |
| C. | character |
| D. | none of' these |
| Answer» C. character | |
| 36. |
Comment on the output of this C code? int const print() { printf("AllIndiaExams.in"); return 0; } void main() { print(); } |
| A. | AllIndiaExams.in is printed infinite number of times |
| B. | AllIndiaExams.in |
| C. | Runtime Error |
| D. | complilation error |
| Answer» C. Runtime Error | |
| 37. |
An external variable |
| A. | is globally accessible by all functions |
| B. | has a declaration |
| C. | will be initialized to 0 if not initialized |
| D. | all of these |
| Answer» E. | |
| 38. |
Whats is the output of this C code? void main() { int const k = 11; k++; printf("k is %d", k); } |
| A. | k is 12 |
| B. | Error because const and int are used together |
| C. | garbage value |
| D. | Error, because a constant variable cannot be changed |
| Answer» E. | |
| 39. |
What is the output of this C code? int main() { const int a; a = 32; printf("a is %d", a); return 0; } |
| A. | a is 32 |
| B. | Compile time error |
| C. | Run time error |
| D. | none |
| Answer» C. Run time error | |
| 40. |
What is the output of this C code? int main() { printf("AllIndiaExams r nclass n"); return 0; } |
| A. | AllIndiaExamsclass |
| B. | AllIndiaExams class |
| C. | classundry |
| D. | AllIndiaExams |
| Answer» C. classundry | |
| 41. |
Consider the statements putchar ( getchar ( )); putchar(getchar( )); if a b is the input, the output will be |
| A. | an error message |
| B. | this can't be the input |
| C. | ab |
| D. | a b |
| Answer» C. ab | |
| 42. |
Literal means |
| A. | a string |
| B. | a string constant |
| C. | a character |
| D. | an alphabet |
| Answer» C. a character | |
| 43. |
If abc is the input, then the following program fragment char x, y, z ; printf ("% d" , scanf ("%c%c%c" , &x , &y , &z )) ; results in |
| A. | a syntax error |
| B. | a fatal error |
| C. | segmentation violation |
| D. | printing of 3 |
| Answer» E. | |
| 44. |
printf ( "%d" , printf ( "tim" ) ): |
| A. | results in a syntax error |
| B. | outputs tim3 |
| C. | outputs garbage |
| D. | prints tim and terminates abruptly |
| Answer» C. outputs garbage | |
| 45. |
If s and b are integers then purpose of the following program fragment is to b = s + b ; s = b - s ; b = b - s ; |
| A. | transfer the contents of s to b |
| B. | transfer the content of b to s |
| C. | exchange (swap) the contents of s and b |
| D. | negate the contents of s and b |
| Answer» D. negate the contents of s and b | |
| 46. |
Which of the following comments regarding the reading of a string, using scanf(with optional) and get is true? |
| A. | Both can be used interchangeably |
| B. | Scanf is delimited by end of line, while gets is not |
| C. | Scanf is delimited by blank, while gets is not |
| D. | All of above |
| Answer» D. All of above | |
| 47. |
Choose the correct answer |
| A. | Enum variables can not be assigned new values |
| B. | Enum variables can be compared |
| C. | Enumeration feature increase the power of C |
| D. | All of above |
| Answer» D. All of above | |
| 48. |
The minimum number of temporary variables needed to swap the contents of two variables is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| Answer» A. 1 | |
| 49. |
What is the output of the following 'C' program? main() { extern int a; printf(" n%d",a); } int a=20; |
| A. | Undefined |
| B. | 20 |
| C. | Error |
| D. | Garbage Value |
| Answer» C. Error | |
| 50. |
enum types are processed by? |
| A. | Compiler |
| B. | Preprocessor |
| C. | Linker |
| D. | Assembler |
| Answer» B. Preprocessor | |