Exercise :: Input / Output - Find Output of Program
1. | What will be the content of 'file.c' after executing the following program?
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Answer: Option A Explanation: Here fputc('A', fp1); stores 'A' in the file1.c then fputc('B', fp2); overwrites the contents of the file1.c with value 'B'. Because the fp1 and fp2 opens the file1.c in write mode. Hence the file1.c contents is 'B'. |
2. | What will be the output of the program ?
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Answer: Option B Explanation: Step 1: int k=1; The variable k is declared as an integer type and initialized to '1'. Step 2: printf("%d == 1 is" "%s\n", k, k==1?"TRUE":"FALSE"); becomes => k==1?"TRUE":"FALSE" => 1==1?"TRUE":"FALSE" => "TRUE" Therefore the output of the program is 1 == 1 is TRUE |
3. | What will be the output of the program ?
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4. | If the file 'source.txt' contains a line "Be my friend" which of the following will be the output of below program?
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Answer: Option C Explanation: The file source.txt contains "Be my friend". fseek(fs, 0, SEEK_END); moves the file pointer to the end of the file. fseek(fs, -3L, SEEK_CUR); moves the file pointer backward by 3 characters. fgets(c, 5, fs); read the file from the current position of the file pointer. Hence, it contains the last 3 characters of "Be my friend". Therefore, it prints "end". |
5. | What will be the output of the program ?
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Answer: Option C Explanation: float a=3.15529; The variable a is declared as an float data type and initialized to value 3.15529; printf("%2.1f\n", a); The precision specifier tells .1f tells the printf function to place only one number after the .(dot). Hence the output is 3.2 |