McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Business Administration in Computer Applications (BBA [CA]) .
Chapters
| 1. |
Which among the following is the odd one out? |
| A. | printf |
| B. | fprintf |
| C. | putchar |
| D. | scanf |
| Answer» D. scanf | |
| 2. |
For a typical program, the input is taken using _________ |
| A. | scanf |
| B. | Files |
| C. | Command-line |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 3. |
What does the following command line signify? prog1 prog2 |
| A. | It runs prog1 first, prog2 second |
| B. | It runs prog2 first, prog1 second |
| C. | It runs both the programs, pipes output of prog1 to input of prog2 |
| D. | It runs both the programs, pipes output of prog2 to input of prog1 |
| Answer» C. It runs both the programs, pipes output of prog1 to input of prog2 | |
| 4. |
What is the default return-type of getchar()? |
| A. | char |
| B. | int |
| C. | char * |
| D. | reading character doesn’t require a return-type |
| Answer» B. int | |
| 5. |
What is the value of EOF? |
| A. | -1 |
| B. | 0 |
| C. | 1 |
| D. | 10 |
| Answer» A. -1 | |
| 6. |
What is the use of getchar()? |
| A. | The next input character each time it is called |
| B. | EOF when it encounters end of file |
| C. | The next input character each time it is called EOF when it encounters end of file |
| D. | None of the mentioned |
| Answer» C. The next input character each time it is called EOF when it encounters end of file | |
| 7. |
Which of the following statement is true? |
| A. | The symbolic constant EOF is defined in <stdio.h> |
| B. | The value is -1 |
| C. | The symbolic constant EOF is defined in <stdio.h> & value is -1 |
| D. | Only value is -1 |
| Answer» C. The symbolic constant EOF is defined in <stdio.h> & value is -1 | |
| 8. |
What is the return value of putchar()? |
| A. | The character written |
| B. | EOF if an error occurs |
| C. | Nothing |
| D. | Both character written & EOF if an error occurs |
| Answer» D. Both character written & EOF if an error occurs | |
| 9. |
Escape sequences are prefixed with ________ |
| A. | % |
| B. | / |
| C. | ” |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
What is the purpose of sprintf? |
| A. | It prints the data into stdout |
| B. | It writes the formatted data into a string |
| C. | It writes the formatted data into a file |
| D. | None of the mentioned |
| Answer» B. It writes the formatted data into a string | |
| 11. |
The syntax to print a % using printf statement can be done by ________ |
| A. | % |
| B. | \% |
| C. | ‘%’ |
| D. | %% |
| Answer» D. %% | |
| 12. |
What are the Properties of the first argument of a printf() functions? |
| A. | It is defined by a user |
| B. | It keeps the record of the types of arguments that will follow |
| C. | There may no be first argument |
| D. | None of the mentioned |
| Answer» B. It keeps the record of the types of arguments that will follow | |
| 13. |
Which of the following function with ellipsis are illegal? |
| A. | void func(…); |
| B. | void func(int, …); |
| C. | void func(int, int, …); |
| D. | none of the mentioned |
| Answer» A. void func(…); | |
| 14. |
Which of the following data-types are promoted when used as a parameter for an ellipsis? |
| A. | char |
| B. | short |
| C. | int |
| D. | none of the mentioned |
| Answer» A. char | |
| 15. |
Which header file includes a function for variable number of arguments? |
| A. | stdlib.h |
| B. | stdarg.h |
| C. | ctype.h |
| D. | both stdlib.h and stdarg.h |
| Answer» A. stdlib.h | |
| 16. |
Which of the following macro extracts an argument from the variable argument list (ie ellipsis) and advance the pointer to the next argument? |
| A. | va_list |
| B. | va_arg |
| C. | va_end |
| D. | va_start |
| Answer» B. va_arg | |
| 17. |
The type va_list in an argument list is used ________ |
| A. | To declare a variable that will refer to each argument in turn; |
| B. | For cleanup |
| C. | To create a list |
| D. | There is no such type |
| Answer» A. To declare a variable that will refer to each argument in turn; | |
| 18. |
In a variable length argument function, the declaration “…” can _______ |
| A. | Appear anywhere in the function declaration |
| B. | Only appear at the end of an argument list |
| C. | Nothing |
| D. | None of the mentioned |
| Answer» B. Only appear at the end of an argument list | |
| 19. |
Each call of va_arg _______ |
| A. | Returns one argument |
| B. | Steps va_list variable to the next |
| C. | Returns one argument & Steps va_list variable to the next |
| D. | None of the mentioned |
| Answer» C. Returns one argument & Steps va_list variable to the next | |
| 20. |
The standard header _______ is used for variable list arguments (…) in C. |
| A. | <stdio.h > |
| B. | <stdlib.h> |
| C. | <math.h> |
| D. | <stdarg.h> |
| Answer» D. <stdarg.h> | |
| 21. |
What is the purpose of va_end? |
| A. | Cleanup is necessary |
| B. | Must be called before the program returns |
| C. | Cleanup is necessary & Must be called before the program returns |
| D. | None of the mentioned |
| Answer» C. Cleanup is necessary & Must be called before the program returns | |
| 22. |
Which of the following is NOT a delimiter for an input in scanf? |
| A. | Enter |
| B. | Space |
| C. | Tab |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 23. |
If the conversion characters of int d, i, o, u and x are preceded by h, it indicates? |
| A. | A pointer to int |
| B. | A pointer to short |
| C. | A pointer to long |
| D. | A pointer to char |
| Answer» B. A pointer to short | |
| 24. |
Which of the following doesn’t require an & for the input in scanf()? |
| A. | char name[10]; |
| B. | int name[10]; |
| C. | float name[10]; |
| D. | all of the mentioned |
| Answer» A. char name[10]; | |
| 25. |
Which of the following is an invalid method for input? |
| A. | scanf(“%d%d%d”,&a, &b, &c); |
| B. | scanf(“%d %d %d”, &a, &b, &c); |
| C. | scanf(“Three values are %d %d %d”,&a,&b,&c); |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 26. |
Which of the following represents the function for scanf()? |
| A. | void scanf(char *format, …) |
| B. | int scanf(char *format, …) |
| C. | char scanf(int format, …) |
| D. | char *scanf(char *format, …) |
| Answer» B. int scanf(char *format, …) | |
| 27. |
What does scanf() function return? |
| A. | Number of successfully matched and assigned input items |
| B. | Nothing |
| C. | Number of characters properly printed |
| D. | Error |
| Answer» A. Number of successfully matched and assigned input items | |
| 28. |
The conversion characters d, i, o, u, and x may be preceded by h in scanf() to indicate? |
| A. | A pointer to short |
| B. | A pointer to long |
| C. | Nothing |
| D. | Error |
| Answer» A. A pointer to short | |
| 29. |
The syntax of printf() function is printf(“control string”, variable list) ;what is the prototype of the control string? |
| A. | %[flags][.precision][width][length]specifier |
| B. | %[flags][length][width][.precision]specifier |
| C. | %[flags][width][.precision][length]specifier |
| D. | %[flags][.precision][length][width]specifier |
| Answer» C. %[flags][width][.precision][length]specifier | |
| 30. |
The parameter control string in the printf () is a C String that contains text to be __________ |
| A. | taken from a standard output device |
| B. | written on to the standard output device |
| C. | received from the standard output device |
| D. | nothing can be said |
| Answer» B. written on to the standard output device | |
| 31. |
Output justification such as decimal point, numerical sign, trailing zeros or octal are specified. |
| A. | specifier |
| B. | flags |
| C. | precision |
| D. | decimal |
| Answer» B. flags | |
| 32. |
What symbol is used to Left-justify within the data given field width? |
| A. | -(minus sign) |
| B. | +(plus sign) |
| C. | # |
| D. | 0 |
| Answer» A. -(minus sign) | |
| 33. |
What specifies the minimum number of characters to print after being padded with zeros or blank spaces? |
| A. | flags |
| B. | length |
| C. | width |
| D. | precision |
| Answer» C. width | |
| 34. |
The maximum number of characters to be printed is specified by __________ |
| A. | precision |
| B. | width |
| C. | length |
| D. | flags |
| Answer» A. precision | |
| 35. |
________is used to define the type and the interpretation of the value of the corresponding argument. |
| A. | precision |
| B. | specifiers |
| C. | flags |
| D. | decimal |
| Answer» B. specifiers | |
| 36. |
A conversion specification %7.4f means ____________ |
| A. | print a floating point value of maximum 7 digits where 4 digits are allotted for the digits after the decimal point |
| B. | print a floating point value of maximum 4 digits where 7digits are allotted for the digits after the decimal point |
| C. | print a floating point value of maximum 7 digits |
| D. | print a floating point value of minimum 7 digits where 4 digits are allotted for the digits after the decimal point |
| Answer» A. print a floating point value of maximum 7 digits where 4 digits are allotted for the digits after the decimal point | |
| 37. |
Choose the correct description for control string %-+7.2f. |
| A. | – means display the sign, + means left justify, 7 specifies the width and 2 specifies the precision |
| B. | – means left justify, + means display the sign, 7 specifies the width and 2 specifies the precision |
| C. | – means display the sign, + means left justify, 7 specifies the precision and 2 specifies the width |
| D. | – means left justify, + means display the sign, 7 specifies the precision and 2 specifies the width |
| Answer» B. – means left justify, + means display the sign, 7 specifies the width and 2 specifies the precision | |
| 38. |
What error is generated on placing an address operator with a variable in the printf statement? |
| A. | compile error |
| B. | run-time error |
| C. | logical error |
| D. | no error |
| Answer» B. run-time error | |
| 39. |
If by mistake you specify more number of arguments, the excess arguments will ____________ |
| A. | be ignored |
| B. | produce compile error |
| C. | produce run-time error |
| D. | produce logical error |
| Answer» A. be ignored | |
| 40. |
What happens when zero flag is used with left justification? |
| A. | data is padded with zeros |
| B. | zero flag is ignored |
| C. | data is padded with blank spaces |
| D. | will give error |
| Answer» B. zero flag is ignored | |
| 41. |
For floating point numbers, the precision flag specifies the number of decimal places to be printed. When no precision modifier is specified, printf() prints _______ |
| A. | six decimal positions |
| B. | five decimal positions |
| C. | four decimal positions |
| D. | three decimal positions |
| Answer» A. six decimal positions | |
| 42. |
What will the given code result in printf(“\n you are\”awesome \" ");? |
| A. | compile error |
| B. | run-time error |
| C. | you are "awesome" |
| D. | you are awesome |
| Answer» C. you are "awesome" | |
| 43. |
What will be the output for the given code printf(“\n The number is %07d”,1212); |
| A. | The number is 0001212 |
| B. | The number is 1212 |
| C. | The number is 1212 |
| D. | The number is 1212000 |
| Answer» A. The number is 0001212 | |
| 44. |
The syntax of the scanf() is scanf(“control string “, arg1,arg2,arg3,….,argn); the prototype of control string is ____________ |
| A. | [=%[width][modifiers]type=] |
| B. | [=%[modifiers][width]type=] |
| C. | [=%[width] [modifiers]] |
| D. | [width][modifiers] |
| Answer» A. [=%[width][modifiers]type=] | |
| 45. |
What is the use of symbol * in the control string as shown [=%[*][width] [modifiers] type=]? |
| A. | * is optional and used when the data should be read from the stream but ignored |
| B. | * is not optional, used to read data from the stream but it is not ignored |
| C. | * is not optional, it is used to read data stream but ignored |
| D. | * is optional and used to read data from stream but it is not ignored |
| Answer» A. * is optional and used when the data should be read from the stream but ignored | |
| 46. |
What action is carried out by scanf if a user enters any blank spaces, tabs, and newlines? |
| A. | consider as input |
| B. | ignores it |
| C. | produces error |
| D. | nothing can be said |
| Answer» B. ignores it | |
| 47. |
What error will generate if the read and write parameters are not separated by commas? |
| A. | run-time error |
| B. | compile error |
| C. | logical error |
| D. | no error |
| Answer» B. compile error | |
| 48. |
_____ is an optional argument that gives the maximum number of characters to be read. |
| A. | modifiers |
| B. | width |
| C. | precision |
| D. | length |
| Answer» B. width | |
| 49. |
Explain the format string "%5d%s %c" |
| A. | five characters as a decimal integer, then reads the remaining as a string and then scans the first non-whitespace character |
| B. | compile error |
| C. | run-time error |
| D. | read first five characters as a decimal and ignore the rest |
| Answer» A. five characters as a decimal integer, then reads the remaining as a string and then scans the first non-whitespace character | |
| 50. |
Select the correct value of i from given options i=scanf("%d %d", &a, &b); |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | No value assigned |
| Answer» B. 2 | |
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