11. How many parameters are available in the function setbuf?

1. 1. 4

   
   
   

   2. 3

   
   
   

   3. 2

   
   
   

   4. 1

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   There are two parameters that are used in setbuf. They are stream and buffer.

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12. Which one is always faster in writing on C++?

1. 1. Writing to memory

   
   
   

   2. Reading from the network

   
   
   

   3. Writing to a file

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   For the stand of file operations, writing to memory (RAM) is always faster than writing to the file on the disk directly.

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13. How many tests are available in read and write operations?

1. 1. 4

   
   
   

   2. 3

   
   
   

   3. 2

   
   
   

   4. 1

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   There are two types of read and write tests. They are throughput in random reads and throughput in contiguous reads.

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14. What will act as a intermediate between i/o operations and physical file?

1. 1. Stream buffer

   
   
   

   2. Memory

   
   
   

   3. Ram

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   A stream buffer is a block of data that acts as intermediary between the i/o operations and the physical file associated to the stream.

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15. What is the output of this program in text files?
    

    #include <iostream>
        int main ()
        {
            char buff[BUFSIZ];
            FILE *ptr1, *ptr2;
            ptr1 = fopen ("FirstFile.txt", "w");
            ptr2 = fopen ("SecondFile.txt", "a");
            setbuf ( ptr1 , buff );
            fputs ("Buffered stream", ptr1);
            fflush (ptr1);
            setbuf ( ptr2 , NULL );
            fputs ("Unbuffered stream", ptr2);
            fclose (ptr1);
            fclose (ptr2);
            return 0;
        }
    

1. 1. Compilation Error

   
   
   

   2. Buffered stream

   
   
   

   3. Unbuffered stream

   
   
   

   4. Buffered & Unbuffered stream

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   In this program, the fopen will create the file and send the text to both of the files.

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