Is Tenth Line easy or hard?

Tenth Line is classified as an Easy problem. The challenge is not algorithmic complexity but familiarity with shell tools like sed, awk, and basic file iteration.

Tenth Line Python/Java solution

In Python or Java, open the file and iterate through each line while counting. When the counter reaches 10, print the line and stop reading further. This approach keeps memory usage constant because the entire file is never loaded into memory.

How to solve Tenth Line in O(n)?

Read the file sequentially and stop once the tenth line is encountered. In shell, commands like `sed -n '10p' file.txt` or `awk 'NR==10' file.txt` accomplish this with a single pass. The scan ensures linear time complexity and constant space.

What is the best approach for Tenth Line?

Using shell utilities like sed or awk is the most direct and idiomatic solution. A command such as `sed -n '10p' file.txt` prints the tenth line without extra processing. It scans the file once, resulting in O(n) time and O(1) space.

Is Tenth Line asked at Google/Amazon/Meta?

Tenth Line is mainly a practice problem for shell scripting and command-line data processing. Similar tasks involving sed, awk, and file parsing can appear in system or DevOps interviews at companies like Amazon or Google.

What data structure is used in Tenth Line?

No complex data structure is required. The solution simply processes a file stream line by line while maintaining a counter for the current line number.

What is the time complexity of Tenth Line?

Both common approaches run in O(n) time where n is the number of lines in the file. The program or command must read lines sequentially until it reaches the tenth line. Memory usage remains O(1) because only one line is processed at a time.

Description Solution Video 7:38

195. Tenth Line

Easy33.8% acceptance4 companies

Given a text file file.txt, print just the 10th line of the file.

Example:

Assume that file.txt has the following content:

Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10

Your script should output the tenth line, which is:

Line 10

Note:
1. If the file contains less than 10 lines, what should you output?
2. There's at least three different solutions. Try to explore all possibilities.

Asked at 4 companies

Adobe Meta

Google Bloomberg

Topics

Shell

7:38

Still stuck?Read 3 approaches, or watch a walkthrough.

Open solution

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1class Solution:
  def solve(self):
      pass


Starter codePython 3Spaces: 4

Examples

Case 1

Input

Line 1\nLine 2\nLine 3\nLine 4\nLine 5\nLine 6\nLine 7\nLine 8\nLine 9\nLine 10

Your code is saved on this device.Solution