C Questions and Answers – Date and Time Functions – 1

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Date and Time Functions – 1”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. Which of the following library functions returns the time in UTC (Greenwich mean time) format?
a) localtime()
b) gettime()
c) gmtime()
d) settime()
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2. What will be the output of the following C code? (By date we mean: date, month and year)

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
    time_t ct;
    time(&ct);
    printf("%s\n",ctime(&ct));
}

a) only current date
b) only current date and current time
c) current date, current time and the day of the week
d) only current time
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3. What will be the output of the following C code if the current system date is 6/22/2017?

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
    time_t ct;
    time(&ct);
    struct tm *mt=localtime(&ct);
    printf("%d\n",mt-> tm_mon+2);
}

a) 8
b) 7
c) 5
d) 6
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4. What will be the output of the following C code if the current system date is 6/22/2017?

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
typedef struct tm tm;
int main()
{
    time_t ct;
    time(&ct);
    tm *mt=localtime(&ct);
    printf("%d\n",mt-> tm_year);
}

a) 17
b) 2017
c) error
d) 117
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5. What will be the output of the following C code if the current system date is 6/22/2017?

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
    time_t ct;
    time(&ct);
    struct tm *mt=localtime(&ct);
    printf("%d\n",mt-> tm_date);
}

a) 22
b) 6
c) 22/6
d) error
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6. The purpose of the function ctime() is that ___________
a) it returns a string representing the local time
b) it returns a void string
c) it returns a string representing the time in UTC format
d) it returns a string representing the time stored in a structure
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7. What will be the output of the following C code?

#include<time.h>
int main (void)
{
    float n = time(NULL);
    printf("%.2f\n" , n);
}

a) time in seconds from 1 January, 1970
b) time in minutes from 1 January, 1970
c) time in seconds from 1 January, 1980
d) time in minutes from 1 January, 1980
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8. What will be the output of the following C code if the system date is 6/2/2017(Friday)?

#include<stdio.h>
#include<time.h>
int main()
{
    struct tm *local, *gm;
    time_t t;
    t=time(NULL);
    local=localtime(&t);
    printf("%d",local->tm_wday);
    return 0;
}

a) 6
b) 5
c) error
d) 0
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9. Which of the following functions returns a pointer to a string representing the date and time stored in a structure?
a) ctime()
b) time()
c) asctime()
d) localtime()
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10. What will be the output of the following C code if it is executed on 2nd January, 2017 (system date)?

#include<stdio.h>
#include<time.h>
int main()
{
    struct tm *local, *gm;
    time_t t;
    t=time(NULL);	
    local=localtime(&t);
    printf("%d",local->tm_yday);
    return 0;
}

a) 0
b) 1
c) 2
d) Error
View Answer

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