C Programming Questions and Answers – File Access
C Programming Questions and Answers – File Access
1.The first and second arguments of fopen are
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 poniter & the second argument is the mode.
d) None of the mentioned of the mentioned
View Answer
Answer:a
2.For binary files, a ___ must be appended to the mode string.
a) Nothing
b) “b”
c) “binary”
d) “01”
View Answer
Answer:b
3.If there is any error while opening a file, fopen will return
a) Nothing
b) EOF
c) NULL
d) Depends on compiler
View Answer
Answer:c
4.Which is true about getc.getc returns?
a) The next character from the stream referred to by file pointer
b) EOF for end of file or error
c) Both a & b
d) Nothing.
View Answer
Answer:c
5.When a C program is started, O.S environment is responsible for opening file and providing pointer for that file?
a) Standard input
b) Standard output
c) Standard error
d) All of the menitoned
View Answer
Answer:d
6.FILE is of type ______ ?
a) int type
b) char * type
c) struct type
d) None of the mentioned
View Answer
Answer:c
7.What is the meant by ‘a’ in the following operation?
fp = fopen(“Random.txt”, “a”);
a) Attach
b) Append
c) Apprehend
d) Add
View Answer
Answer:b
8.Which of the following mode argument is used to truncate?
a) a
b) f
c) w
d) t
View Answer
Answer:c
9.Which type of files can’t be opened using fopen()?
a) .txt
b) .bin
c) .c
d) None of the mentioned
View Answer
Answer:d
10.Which of the following fopen statements are illegal?
a) fp = fopen(“abc.txt”, “r”);
b) fp = fopen(“/home/user1/abc.txt”, “w”);
c) fp = fopen(“abc”, “w”);
d) None of the mentioned
View Answer
Answer:d
11.What does the following segment of code do?
fprintf(fp, “Copying!”);
a) It writes “Copying!” into the file pointed by fp
b) It reads “Copying!” from the file and prints on display
c) It writes as well as reads “Copying!” to and from the file and prints it
d) None of the mentioned
View Answer
Answer:a
12.FILE reserved word is
a) A structure tag declared in stdio.h
b) One of the basic datatypes in c
c) Pointer to the structure defined in stdio.h
d) It is a type name defined in stdio.h
View Answer
Answer:d
13.What is the output of this C code?
#include <stdio.h>
int main()
{
FILE *fp = stdin;
int n;
fprintf(fp, “%d”, 45);
}
a) Compilation error
b) 45
c) Nothing
d) Depends on the standard
View Answer
Answer:c
14.What is the output of this C code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *fp = stdout;
int n;
fprintf(fp, “%d”, 45);
}
a) Compilation error
b) 45
c) Nothing
d) Depends on the standard
View Answer
Answer:b
15.stdout, stdin and stderr are
a) File pointers
b) File desciptors
c) Streams
d) Structure
View Answer
Answer:a
16.Which of the following statements about stdout and stderr are true?
a) Same
b) Both connected to screen always.
c) Both connected to screen by default.
d) stdout is line buffered but stderr is unbuffered.
View Answer
Answer:c
17.What is the output of this C code?
#include <stdio.h>
int main()
{
FILE *fp = stdout;
int n;
fprintf(fp, “%d “, 45);
fprintf(stderr, “%d “, 65);
return 0;
}
a) 45 65
b) 65 45
c) 65
d) Compilation error
View Answer
Answer:b
18.What is the output of this C code?
#include <stdio.h>
int main()
{
FILE *fp = stdout;
int n;
fprintf(fp, “%d\n “, 45);
fprintf(stderr, “%d “, 65);
return 0;
}
a) 45 65
b) 65 45
c) 65
d) Compilation error
View Answer
Answer:a
19.What is the output of this C code?
#include <stdio.h>
int main()
{
FILE *fp = stdout;
int n;
fprintf(fp, “%d “, 45);
fflush(stdout);
fprintf(stderr, “%d”, 65);
return 0;
}
a) 45 65
b) 65 45
c) 45
d) Compilation error
View Answer
Answer:a
