Hadoop Distributed File System Flashcards
1
Q
What are the major functions of a file system?
A
- Control how data is stored and retrieved.
- Metadata about files and folders.
- Permissions and security.
-Manage storage space efficiently.
2
Q
What is the block size for Hadoop?
A
128 MB
3
Q
What are the functionalities of HDFS?
A
- Supports distributed processing
- Handles failures
- HDFS supports scalability
- HDFS is cost effective
4
Q
What is the syntax of a command?
A
command [-option(s)][argument(s)]
5
Q
What does the command sudo do?
A
super user do
6
Q
What does the command ls do?
A
List
ls -l -> detailed list
ls -lh -> human readable language
7
Q
What does the command cd do?
A
change directory.
8
Q
What does the command whereis do?
A
To execute a command but you don’t know where the file is located.
9
Q
What does the command cat do?
A
Concatenates, shows a snippet of a file.
10
Q
What does the command gedit do?
A
Edits text.
11
Q
What does chmod do?
A
Changes the permissions on a file or folder.
