Which command concatenates files and prints on standard output?

Which command concatenates files and prints on standard output?

• A. Grep
• B. Less
• C. Cat
• D. Head

Answer: (C)

Concatenating files and sending the result to standard output is what the cat command does. It reads one or more files in order and writes their combined contents to stdout, meaning your screen or whatever you’ve wired the output to. If you specify multiple files, you’ll see their contents glued together in sequence. You can also redirect that output to another file or pipe it into another program, which is a common way to chain commands. For example, running cat file1.txt file2.txt will display both files one after the other on the screen. The other commands don’t perform this straightforward combination: grep searches for patterns, less is a paging viewer, and head prints only the first part of the input.

Concatenating files and sending the result to standard output is what the cat command does. It reads one or more files in order and writes their combined contents to stdout, meaning your screen or whatever you’ve wired the output to. If you specify multiple files, you’ll see their contents glued together in sequence. You can also redirect that output to another file or pipe it into another program, which is a common way to chain commands. For example, running cat file1.txt file2.txt will display both files one after the other on the screen. The other commands don’t perform this straightforward combination: grep searches for patterns, less is a paging viewer, and head prints only the first part of the input.