121 + Interview Questions in Input And Output In C in C Page 3 InterviewSolution

101.	For binary files, a ___ must be appended to the mode string.(a) Nothing(b) “b”(c) “binary”(d) “01”I got this question in a national level competition.This question is from File Access topic in section Input and Output in C of C
Answer» RIGHT CHOICE is (B) “b” The EXPLANATION: NONE.

Discussion

102.	Which among the following is the odd one out?(a) printf(b) fprintf(c) putchar(d) scanfI have been asked this question during a job interview.I want to ask this question from Standard Input & Output in chapter Input and Output in C of C
Answer» The CORRECT OPTION is (d) scanf The BEST I can EXPLAIN: NONE.

Discussion

103.	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 errorI had been asked this question during an online exam.This question is from printf in division Input and Output in C of C
Answer» The CORRECT answer is (a) be ignored The best I can EXPLAIN: The EXCESS arguments will SIMPLY be ignored.

Discussion

104.	What symbol is used to Left-justify within the data given field width?(a) -(minus sign)(b) +(plus sign)(c) #(d) 0I got this question in a national level competition.My enquiry is from printf in chapter Input and Output in C of C
Answer» Right choice is (a) -(MINUS sign) EASY explanation - To left-justify the data USE minus sign(-) in the FLAGS field.

Discussion

105.	What is function srand(unsigned)?(a) Sets the seed for rand(b) Doesn’t exist(c) Is an error(d) None of the mentionedI have been asked this question in examination.This interesting question is from Random Number Generation topic in section Input and Output in C of C
Answer» CORRECT CHOICE is (a) SETS the SEED for rand Explanation: NONE.

Discussion

106.	Which types of input are accepted in toupper(c)?(a) char(b) char (c) float(d) Both char and char The question was posed to me during an internship interview.The doubt is from Character Class Testing & Conversions in section Input and Output in C of C
Answer» The CORRECT ANSWER is (a) char The EXPLANATION: NONE.

Discussion

107.	stderr is similar to?(a) stdin(b) stdout(c) both stdout and stdin(d) none of the mentionedI had been asked this question in an interview for job.Asked question is from Error Handling in chapter Input and Output in C of C
Answer» CORRECT ANSWER is (a) stdin The BEST EXPLANATION: NONE.

Discussion

108.	Within main, return expr statement is equivalent to ________(a) abort(expr)(b) exit(expr)(c) ferror(expr)(d) none of the mentionedI had been asked this question in my homework.This key question is from Error Handling in section Input and Output in C of C
Answer» RIGHT CHOICE is (b) exit(EXPR) The explanation is: None.

Discussion

109.	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 mentionedI had been asked this question during an online exam.This question is from Formatted Input in section Input and Output in C of C
Answer» RIGHT ANSWER is (d) NONE of the mentioned The BEST EXPLANATION: None.

Discussion

110.	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 mentionedI got this question during an interview.This key question is from Variable Length Argument topic in portion Input and Output in C of C
Answer» RIGHT choice is (a) VOID func(…); The explanation is: NONE.

Discussion

111.	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 standardThis question was posed to me in homework.My question is taken from Formatted Output topic in section Input and Output in C of C
Answer» RIGHT ANSWER is (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 Explanation: None.

Discussion

112.	What is the function of the mode ‘ w+’?(a) create text file for writing, discard previous contents if any(b) create text file for update, discard previous contents if any(c) create text file for writing, do notdiscard previous contents if any(d) create text file for update, do not discard previous contents if anyI had been asked this question in semester exam.I'm obligated to ask this question of File Operations in division Input and Output in C of C
Answer» Right answer is (B) create text FILE for update, discard previous contents if any The BEST explanation: w+ is a mode used to OPEN a text file for update (i. E., writing and reading), discard previous contents if any.

Discussion

113.	Which one of the following is correct syntax for openinga file.(a) FILE fopen(const filename, const char mode)(b) FILE fopen(const filename)(c) FILE open(const filename, const char mode)(d) FILE open(const*filename)The question was asked in final exam.My question is based upon File Operations in section Input and Output in C of C
Answer» Correct choice is (a) FILE fopen(const FILENAME, const CHAR *mode) Explanation: fopen() OPENS the named file, and RETURNS a stream, or NULL of the attempt fails.

Discussion

114.	Which among the following is correct function call for rand() and random()?(a) rand() and random();(b) rand() and random(1);(c) rand(1) and random(1);(d) rand(1) and random();I have been asked this question at a job interview.This interesting question is from Random Number Generation in portion Input and Output in C of C
Answer» Right answer is (a) RAND() and RANDOM(); Best EXPLANATION: None.

Discussion

115.	function fabs defined math.h header file takes the argument of type integer.(a) True(b) False(c) Depends on the implementation(d) Depends on the standardI got this question in a national level competition.Query is from Mathematical Functions in division Input and Output in C of C
Answer» CORRECT OPTION is (B) False Explanation: NONE.

Discussion

116.	calloc() returns storage that is initialized to.(a) Zero(b) Null(c) Nothing(d) OneI got this question during an internship interview.This interesting question is from Storage Management topic in section Input and Output in C of C
Answer» CORRECT ANSWER is (a) Zero Easy EXPLANATION - NONE.

Discussion

117.	The function ____ obtains a block of memory dynamically.(a) calloc(b) malloc(c) both calloc & malloc(d) freeI had been asked this question in unit test.My query is from Storage Management topic in portion Input and Output in C of C
Answer» The correct CHOICE is (C) both calloc & malloc Easy EXPLANATION - None.

Discussion

118.	ungetc() can be used only with getc().(a) true(b) false(c) depends on the standard(d) depends on the platformI have been asked this question in an internship interview.This interesting question is from Ungetc topic in section Input and Output in C of C
Answer» CORRECT ANSWER is (B) false Easy EXPLANATION - NONE.

Discussion

119.	stderr is similar to?(a) stdin(b) stdout(c) Both stdout and stdin(d) None of the mentionedThe question was asked in exam.Enquiry is from Error Handling in section Input and Output in C of C
Answer» Right answer is (B) stdout Explanation: stderr is not exactly the same as stdout, but similar in the SENSE that both PUTS the output or error to the MONITOR.

Discussion

120.	What is the return value of getc()?(a) The next character from the stream is not referred by file pointer(b) EOF for end of file or error(c) Nothing(d) None of the mentionedThis question was posed to me by my college director while I was bunking the class.My question comes from File Access topic in division Input and Output in C of C
Answer» Correct option is (B) EOF for end of file or error The best explanation: NONE.

Discussion

121.	putchar(c) function/macro always outputs character c to the __________(a) screen(b) standard output(c) depends on the compiler(d) depends on the standardThis question was addressed to me in semester exam.I want to ask this question from Standard Input & Output in section Input and Output in C of C
Answer» The correct choice is (B) STANDARD output The EXPLANATION is: None.

Discussion

Explore topic-wise InterviewSolutions in .

For binary files, a ___ must be appended to the mode string.(a) Nothing(b) “b”(c) “binary”(d) “01”I got this question in a national level competition.This question is from File Access topic in section Input and Output in C of C

Which among the following is the odd one out?(a) printf(b) fprintf(c) putchar(d) scanfI have been asked this question during a job interview.I want to ask this question from Standard Input & Output in chapter Input and Output in C of C

What symbol is used to Left-justify within the data given field width?(a) -(minus sign)(b) +(plus sign)(c) #(d) 0I got this question in a national level competition.My enquiry is from printf in chapter Input and Output in C of C

What is function srand(unsigned)?(a) Sets the seed for rand(b) Doesn’t exist(c) Is an error(d) None of the mentionedI have been asked this question in examination.This interesting question is from Random Number Generation topic in section Input and Output in C of C

Which types of input are accepted in toupper(c)?(a) char(b) char *(c) float(d) Both char and char *The question was posed to me during an internship interview.The doubt is from Character Class Testing & Conversions in section Input and Output in C of C

stderr is similar to?(a) stdin(b) stdout(c) both stdout and stdin(d) none of the mentionedI had been asked this question in an interview for job.Asked question is from Error Handling in chapter Input and Output in C of C

Within main, return expr statement is equivalent to ________(a) abort(expr)(b) exit(expr)(c) ferror(expr)(d) none of the mentionedI had been asked this question in my homework.This key question is from Error Handling in section Input and Output in C of C

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 mentionedI got this question during an interview.This key question is from Variable Length Argument topic in portion Input and Output in C of C

function fabs defined math.h header file takes the argument of type integer.(a) True(b) False(c) Depends on the implementation(d) Depends on the standardI got this question in a national level competition.Query is from Mathematical Functions in division Input and Output in C of C

calloc() returns storage that is initialized to.(a) Zero(b) Null(c) Nothing(d) OneI got this question during an internship interview.This interesting question is from Storage Management topic in section Input and Output in C of C

The function ____ obtains a block of memory dynamically.(a) calloc(b) malloc(c) both calloc & malloc(d) freeI had been asked this question in unit test.My query is from Storage Management topic in portion Input and Output in C of C

ungetc() can be used only with getc().(a) true(b) false(c) depends on the standard(d) depends on the platformI have been asked this question in an internship interview.This interesting question is from Ungetc topic in section Input and Output in C of C

stderr is similar to?(a) stdin(b) stdout(c) Both stdout and stdin(d) None of the mentionedThe question was asked in exam.Enquiry is from Error Handling in section Input and Output in C of C

putchar(c) function/macro always outputs character c to the __________(a) screen(b) standard output(c) depends on the compiler(d) depends on the standardThis question was addressed to me in semester exam.I want to ask this question from Standard Input & Output in section Input and Output in C of C

Which types of input are accepted in toupper(c)?(a) char(b) char (c) float(d) Both char and char The question was posed to me during an internship interview.The doubt is from Character Class Testing & Conversions in section Input and Output in C of C