ENSF 461 PRACTICE TEST 2026 SOLVED QUESTIONS WITH CORRECT ANSWERS GRADED A+

ENSF 461 PRACTICE TEST 2026 SOLVED
QUESTIONS WITH CORRECT ANSWERS
GRADED A+

●● ls -1.
Answer: displays the output in a single column


●● grep.
Answer: searches for lines containing whatever input you give it in the
specified file


●● wc -l.
Answer: counts the number of lines in the output or file


●● wc.
Answer: returns the number of lines, words and bytes in the file


●● standard output.
Answer: output stream printed on the terminal


●● standard error.
Answer: basically standard output, just used for error messages

, ●● standard input.
Answer: input stream, receiving input from terminal


●● write(int fd, const char* buf, size_t count).
Answer: writes data to a file


parameters: (int fd: 1 for standard output, 2 for standard error,
const char* buf: a pointer to the data you want to write,
size_t count: the number of bytes you want to write from the 'buf' to the
file)


●● read(int fd, const char* buf, size_t count).
Answer: reads data from a file


parameters: (int fd: 0 for standard input, const char* buf: the pointer to
the buffer that the data you read will be stored, size_t count: the
maximum you can read into buf)


●● command > filename.
Answer: save standard output to a new file "filename"


Use >> for append to avoid deleting content