MCQOPTIONS
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MCQOPTIONS
This section includes 391 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
puts() function adds newline character. |
| A. | True |
| B. | False |
| C. | Depends on the standard |
| D. | Undefined behaviour |
| Answer» B. False | |
| 302. |
Which of the following will return a result most quickly for searching a given key? |
| A. | Unsorted Array |
| B. | Sorted Array |
| C. | Sorted linked list |
| D. | Binary Search Tree |
| Answer» E. | |
| 303. |
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» B. compile error | |
| 304. |
Which of the following library function is not case-sensitive? |
| A. | toupper() |
| B. | tolower() |
| C. | isdigit() |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 305. |
Which of these is a correct way to generate numbers between 0 to 1(inclusive) randomly? |
| A. | rand() / RAND_MAX |
| B. | rand() % 2 |
| C. | rand(0, 1) |
| D. | none of the mentioned |
| Answer» B. rand() % 2 | |
| 306. |
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» B. int name[10]; | |
| 307. |
The______function reads atmost one less than the number of characters specified by size from the given stream and it is stored in the string str. |
| A. | fget() |
| B. | fgets() |
| C. | fput() |
| D. | fputs() |
| Answer» C. fput() | |
| 308. |
What is the syntax of ungetc()? |
| A. | void ungetc(int c, FILE *fp) |
| B. | int ungetc(int c, FILE *fp) |
| C. | int ungetc(String c, FILE *fp) |
| D. | int getc(int c, FILE *fp) |
| Answer» C. int ungetc(String c, FILE *fp) | |
| 309. |
Control string specifies the type and format of the data that has to be obtained from the keyboard. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 310. |
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» C. – means display the sign, + means left justify, 7 specifies the precision and 2 specifies the width | |
| 311. |
Which of the following mathematical function requires 2 parameter for successful function call? |
| A. | fmod(); |
| B. | div(); |
| C. | atan2(); |
| D. | all of the mentioned |
| Answer» E. | |
| 312. |
The syntax to print a % using printf statement can be done by ________ |
| A. | % |
| B. | \% |
| C. | '%' |
| D. | %% |
| Answer» E. | |
| 313. |
Which type of files can't be opened using fopen()? |
| A. | .txt |
| B. | .bin |
| C. | .c |
| D. | none of the mentioned |
| Answer» E. | |
| 314. |
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» E. | |
| 315. |
Which types of input are accepted in toupper(c)? |
| A. | char |
| B. | char * |
| C. | float |
| D. | Both char and char * |
| Answer» B. char * | |
| 316. |
gets() does the following when it reads from stdin. |
| A. | Deletes the 't' |
| B. | Puts adds it. |
| C. | Deletes the terminating 'n' |
| D. | Nothing |
| Answer» D. Nothing | |
| 317. |
scanf() is a predefined function in______header file. |
| A. | stdlib. h |
| B. | ctype. h |
| C. | stdio. h |
| D. | stdarg. h |
| Answer» D. stdarg. h | |
| 318. |
Which among the following is the odd one out? |
| A. | printf |
| B. | fprintf |
| C. | putchar |
| D. | scanf |
| Answer» E. | |
| 319. |
what is the function of fputs()? |
| A. | read a line from a file |
| B. | read a character from a file |
| C. | write a character to a file |
| D. | write a line to a file |
| Answer» E. | |
| 320. |
Which of the following is the correct declaration for ungetc? |
| A. | int ungetc(int c, FILE fp); |
| B. | int ungetc(int *c, FILE fp); |
| C. | int ungetc(int c, FILE *fp); |
| D. | int ungetc(int *c, FILE *fp); |
| Answer» D. int ungetc(int *c, FILE *fp); | |
| 321. |
What is the difference in the ASCII value of capital and non-capital of the same letter is? |
| A. | 1 |
| B. | 16 |
| C. | 32 |
| D. | Depends with compiler |
| Answer» D. Depends with compiler | |
| 322. |
What type of inputs are accepted by mathematical functions? |
| A. | short |
| B. | int |
| C. | float |
| D. | double |
| Answer» E. | |
| 323. |
calloc() initialize memory with all bits set to zero. |
| A. | True |
| B. | False |
| C. | Depends on the compiler |
| D. | Depends on the standard |
| Answer» B. False | |
| 324. |
log(x) function defined in math.h header file is __________ |
| A. | Natural base logarithm |
| B. | Logarithm to the base 2 |
| C. | Logarithm to the base 10 |
| D. | None of the mentioned |
| Answer» B. Logarithm to the base 2 | |
| 325. |
gets() function checks overflow run. |
| A. | True |
| B. | False |
| C. | Depends on the standard |
| D. | Undefined behaviour |
| Answer» C. Depends on the standard | |
| 326. |
What is function srand(unsigned)? |
| A. | Sets the seed for rand |
| B. | Doesn't exist |
| C. | Is an error |
| D. | None of the mentioned |
| Answer» B. Doesn't exist | |
| 327. |
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» C. logical error | |
| 328. |
_____ is an optional argument that gives the maximum number of characters to be read. |
| A. | modifiers |
| B. | width |
| C. | precision |
| D. | length |
| Answer» C. precision | |
| 329. |
Which of the following is used during memory deallocation in C? |
| A. | remove(p); |
| B. | delete(p); |
| C. | free(p); |
| D. | terminate(p); |
| Answer» D. terminate(p); | |
| 330. |
ungetc() can be used only with getc(). |
| A. | true |
| B. | false |
| C. | depends on the standard |
| D. | depends on the platform |
| Answer» C. depends on the standard | |
| 331. |
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» D. you are awesome | |
| 332. |
What is the size of array 'line' used in fgets(line, maxline, *fp) function? |
| A. | maxline – 1 |
| B. | maxline |
| C. | maxline + 1 |
| D. | Size is dynamic |
| Answer» C. maxline + 1 | |
| 333. |
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» D. %[flags][.precision][length][width]specifier | |
| 334. |
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» C. Nothing | |
| 335. |
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» C. A pointer to long | |
| 336. |
Which of the following is not a valid mathematical function? |
| A. | frexp(x); |
| B. | atan2(x,y); |
| C. | srand(x); |
| D. | fmod(x); |
| Answer» E. | |
| 337. |
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» B. [=%[modifiers][width]type=]. | |
| 338. |
The standard header _______ is used for variable list arguments (…) in C. |
| A. | <stdio.h > |
| B. | <stdlib.h> |
| C. | <math.h> |
| D. | <stdarg.h> |
| Answer» E. | |
| 339. |
Choose the correct difference between getc() and fgetc(). |
| A. | If it is not a macro, it may evaluate stream more than once |
| B. | if it is amacro, it may not evaluate stream more than once |
| C. | if it is a macro, it may evaluate stream more than once |
| D. | no difference between fgetc() and getc() |
| Answer» D. no difference between fgetc() and getc() | |
| 340. |
A fatal error will be generated if the format string is ended with a white space character. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 341. |
ungetc() is used __________ |
| A. | to get a char |
| B. | to get an int |
| C. | to push a character back to file |
| D. | nothing |
| Answer» D. nothing | |
| 342. |
The functions vprintf(), vfprintf(), and vsprintf() are not equivalent to the corresponding printf() functions except the variable argument list. |
| A. | true |
| B. | false |
| Answer» C. | |
| 343. |
function fabs defined math.h header file takes argument of type integer. |
| A. | True |
| B. | False |
| C. | Depends on the implementation |
| D. | Depends on the standard |
| Answer» C. Depends on the implementation | |
| 344. |
What is the difference between %e and %g? |
| A. | %e output formatting depends on the argument and %g always formats in the format [-]m.dddddd or [-]m.dddddE[+|-]xx where no.of ds are optional |
| B. | %e always formats in the format [-]m.dddddd or [-]m.dddddE[+|-]xx where no.of ds are optional and output formatting depends on the argument |
| C. | No differences |
| D. | Depends on the standard |
| Answer» C. No differences | |
| 345. |
The statement prog < infile causes _________ |
| A. | prog to read characters from infile |
| B. | prog to write characters to infile |
| C. | infile to read characters from prog instead |
| D. | nothing |
| Answer» B. prog to write characters to infile | |
| 346. |
What are the first and second arguments of fopen? |
| A. | A character string containing the name of the file & the second argument is the mode |
| B. | A character string containing the name of the user & the second argument is the mode |
| C. | A character string containing file pointer & the second argument is the mode |
| D. | None of the mentioned |
| Answer» B. A character string containing the name of the user & the second argument is the mode | |
| 347. |
puts() does the following when it writes to stdout. |
| A. | Deletes everything |
| B. | Adds 't' to the line written |
| C. | Deletes the terminating 'n' |
| D. | Adds 'n' to the line written |
| Answer» E. | |
| 348. |
Strcat() function adds null character. |
| A. | Only if there is space |
| B. | Always |
| C. | Depends on the standard |
| D. | Depends on the compiler |
| Answer» C. Depends on the standard | |
| 349. |
The syntax of fgets is char *fgets(char *line, int maxline, FILE *fp). Which is true for fgets? |
| A. | Returns line on success |
| B. | On end of file or error it returns NULL |
| C. | Nothing |
| D. | Both returns line on success & On end of file or error it returns NULL |
| Answer» E. | |
| 350. |
In linux, apart from including math header file, the program is successfully executed by which of the following? |
| A. | cc filename.c |
| B. | cc filename.c -lc |
| C. | cc -math filename.c |
| D. | cc -lm filename.c |
| Answer» E. | |