What is returned when the readline method reaches the end of the file?

Question

BlackTom AI · Accepted Answer

We start by restating the question and listing the available options to ensure clarity about what we are evaluating.
Question: What is returned when the readline method reaches the end of the file?
Options: 
, 	, , ""

Option 1: '
' — This represents a newline character. Returning a newline at EOF would imply that there is an additional line break after the end, which is not how EOF typically signals the end of input. Therefore this option describes a character that would appear inside a line, not the signal of reaching the end.
Option 2: '	' — This is a tab character. A tab being returned at EOF would indicate that a tab character exists at the end of the content, which is unrelated to the end-of-file condition. It does not reflect the end of data.
Option 3: '' — This is a carriage return character. In many contexts,  might appear as part of a Windows-style newline (
) within the file, but at EOF the function is signaling that there is no more data to read, not that there is a control character at the end. This option misinterprets the EOF signal.
Option 4: '""' — This represents an empty string (no characters). When a readline method reaches the end of the file, there are no more characters to return, so the conventional behavior is to return an empty string to indicate EOF rather than a newline, tab, or carriage return.
Now, comparing these interpretations, we see that the only option aligned with the EOF convention is the empty string, since no further characters can be read once the end is reached. The other options describe actual characters that could appear within a line, but do not signify EOF. Hence, the empty string best matches the end-of-file condition for a typical readline implementation.

Fal25_CS003C_74229 Ch. 7 Pre-Quiz (Remotely Proctored)

What is returned when the readline method reaches the end of the file?

查看解析

登录即可查看完整答案

类似问题

Consider the following C code sequence: while (fread(&thing, sizeof(data_t), 1, fp) == 1) { // process item that was read ... } If this code sequence and function call appears in a program, it can be reasonably expected:

Which statement below can be used to read data from a file one character at a time?

In the code snippet below, if the file contains the following words: apple, pear, and banana stored one per line, what would be the output? infile = open("input.txt", "r") for word in infile : word = word.rstrip() print(word)

Before accessing a file, the program must:

What happens when the following code segment executes if test.txt does not exist? infile = open("test.txt", "r")

When reading a file in Python, you must specify two items:

What does a mode string of 'r' indicate when opening a file in Python?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单