Out of fgets() and gets() which function is safe to use?

More Questions from Input / Output

• To print out a and b given below, which of the following printf() statement will you use? #include float a=3.14; double b=3.14;
• In a file contains the line "I am a boy\r\n" then on reading this line into the array str using fgets(). What will str contain?
• Which files will get closed through the fclose() in the following program? #include int main() { FILE *fs, *ft, *fp; fp = fopen("A.C", "r"); fs = fopen("B.C", "r"); ft = fopen("C.C", "r"); fclose(fp, fs, ft); return 0; }
• What is the purpose of "rb" in fopen() function used below in the code? FILE *fp; fp = fopen("source.txt", "rb");
• Consider the following program and what will be content of t? #include int main() { FILE *fp; int t; fp = fopen("DUMMY.C", "w"); t = fileno(fp); printf("%d\n", t); return 0; }
• What does fp point to in the program? #include int main() { FILE *fp; fp=fopen("trial", "r"); return 0; }
• On executing the below program what will be the contents of 'target.txt' file if the source file contains a line "To err is human"? #include int main() { int i, fss; char ch, source[20] = "source.txt", target[20]="target.txt", t; FILE *fs, *ft; fs = fopen(source, "r"); ft = fopen(target, "w"); while(1) { ch=getc(fs); if(ch==EOF) break; else { fseek(fs, 4L, SEEK_CUR); fputc(ch, ft); } } return 0; }
• Which of the following operations can be performed on the file "NOTES.TXT" using the below code? FILE *fp; fp = fopen("NOTES.TXT", "r+");
• What will be the content of 'file.c' after executing the following program? #include int main() { FILE *fp1, *fp2; fp1=fopen("file.c", "w"); fp2=fopen("file.c", "w"); fputc('A', fp1); fputc('B', fp2); fclose(fp1); fclose(fp2); return 0; }
• What will be the output of the program? #include int main() { int k=1; printf("%d == 1 is" "%s\n", k, k==1?"TRUE":"FALSE"); return 0; }

Discussion & Comments