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- The 'a' mode appends new data to the end of an existing file. But if the file is nonexistent, it does not create a new one to append the data.True or FalseSuppose you have an open file object called infile. Which of the following C++ statements will close the file? A infile.closeFile(); B closeFile("infile"); C close("infile"); D infile.close():When a Python program begins execution, it creates three standard file objects: ● sys.stdin–the standard input file object, ● sys.stdout–the standard output file object, and ● sys.stderr–the standard error file object. You must import the sys module if you need to refer to these objects explicitly in your code, but this is rare. Which of the following statements is false? Function print implicitly outputs to sys.stdout, which appears in the command line. The input function implicitly uses sys.stdin to get user input from the keyboard. Python implicitly outputs program errors and tracebacks to sys.stdout. Though these are considered file objects, they do not read from or write to files by default.
- Consider the following code snippet: pit_t pipefd[2]; pipe (pipefd); Which file descriptor represents the write end of the pipe? 1 pipefd[0] O pipefd[1] O The write end of the pipe cannot be determined at this pointGiven a valid file object, f, which of the following calls will return the entire contents of the file in a scalar x? x = f.readline() x = f.readlines() x = f.read() X = read(f)Which file open flag causes the contents of an existing file to be discarded and the file size reduced to zero?
- getc () returns EOF when the end of the file is reached O when getc () fails to read a character both of the above none of the above QUESTION 16 In debugging with GDB, break points can be set to any line O any function O any line or any function none of the above2. File handling is an important part of any application. Assume that, you are asked to build an application to find the harmonic mean in a file. Assume that you have to read the file of "Filel.txt" and print the harmonic mean of each row to an output file "File2.txt". All of the data in the "File1.txt" is comma separated. In file1.txt you are given the name of the data set in first place, then you are given the data list. All of them are comma separated. Your task is to compute the harmonic mean from the given file | for each dataset. The file may contain more than 1000 rows. Write your code by following the requirements. File2.txt harmonic mean of Datal is 3.50 harmonic mean of Data2 is 3.43 harmonic mean of Data3 is 3.50 File1.txt Data1, 3, 4, 4, 3, 3.7, 4, 3.3, 1 Data2, 3, 4, 3.7, 3, 3.7, 4, 3, 1 Data3, 3, 4, 4, 3, 3.7, 4, 3, 2 Data4, 3, 4, 4, 3, 3.7, 4, 3.3, 2 Design a JAVA application that can perform the task with the given scenario. harmonic mean of Data4 is 3.49FILE* inFile = fopen("filenam.txt", "r"); Given the above code segment, which of the following would output "FILE NOT FOUND" if the file could not be opened? Group of answer choices if(inFile == NULL) { printf("FILE NOT FOUND"); } if(inFile) { printf("FILE NOT FOUND"); } if(!inFile->is_open()) { printf("FILE NOT FOUND"); } None of these ============= What does sscanf do? Group of answer choices Reads from a file Reads from a keyboard Reads from a string Writes to a screen =========== What comes first in the software development life cycle? Group of answer choices Algorithm design Identifying the problem Coding Testing
- Write a program that creates the following three files; dataplus.txt dataminus.txt zeros.txt The program should read each line of the data.txt file and perform the following; If the line contains a positive number, that number should be written to the dataplus.txt file If the line contains a negative number, that number should be written to the dataminus.txt file If the line contains the value 0, do not write the value to a file. Instead, keep a count of the number of times 0 is read from the data.txt file After all the lines have been read from the data.txt file, the program should write the count of zeros to the zeros.txt file. The code is below does not work:Examine the following three functions that take as argument a file name and return the extension of that file. For instance, if the file name is 'myfile.tar.gz' the returned value of the function should be 'gz'. If the file name has no extention, i.e. when the file name is just 'myfile', the function should return an empty string. def get_extension1(filename): return(filename.split(".")[-1]) def get_extension2(filename): import os.path return(os.path.splitext(filename)[1]) def get_extension3(filename): return filename[filename.rfind('.'):][1:] Which of the these functions are doing exactly what they are supposed to do according to the description above? get_extension3 only get_extension2 only None of them. get_extension1 onlyShow an example call to the CreateFile function that will open an existing file for reading
