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1. What is Amazon web services in Devops?

AWS provides services that help you practice DevOps at your company and that are built first for use with AWS. These tools automate manual tasks, help teams manage complex environments at scale, and keep engineers in control of the high velocity that is enabled by DevOps.

 2.What is iNode on Linux and more details on that?

The iNode in Linux is an entry table containing information about the regular file and directory. It can be viewed as a data structure that contains the metadata about the files. The following are the contents of the iNode.

  • User ID - Owner of the file.

  • Group ID - Owner of the group.

  • Size of File - a major or minor number in some files.

  • Timestamp - access time, and modification time.

  • Attributes - some properties of the file.

  • Access control list - permission for users.

  • Link count - The number of hard links relative to the inode.

  • File type - Type of the file such as regular, directory, or pipe.

3. What is Devops with Cloud Computing?

Inseparable development and operations practices are universally relevant. Cloud computing, agile development, and DevOps are interlocking parts of a strategy for transforming IT into a business adaptability enabler. If cloud is an instrument, then DevOps is the musician that plays it.

4.How do you check physical memory on Linux?

There are a number of ways to check for physical memory size on Linux. The popular ways are,

Free command: Type the free command to check the physical memory size.

free -b //gives the size in bytes
free -k //gives the size in kilobytes
free -m //gives the size in megabytes
free -g //gives the size in gigabytes

Top command: The top command lists the physical memory information in a clear way.

Vmstat command: The vmstat (virtual memory stats) command with -s switch lists the memory in detail.

5.What is Devops tooling by Aws?

AWS provides services that help you practice DevOps at your company and that are built first for use with AWS. These tools automate manual tasks, help teams manage complex environments at scale, and keep engineers in control of the high velocity that is enabled by DevOps.

 

6.What steps happen when a copy of the local file to HDFS run?

The steps in copying a local file to the HDFS.

  1. Create a new file in the local filesystem with any name such as test.txt in the folder /home/user/.

  2. Add some content to the file test.txt: echo "hello" > /home/user/test.txt.

  3. Create a new directory in the HDFS using the command: hadoop fs -mkdir /user/in

  4. Finally, copy the local file to the HDFS using the command: hadoop fs -copyFromLocal /home/user/test.txt /user/in/test.txt

7. Explain the steps/channels When the user accesses a URL via a browser?

The steps in accessing a URL through the browser are:

  1. Enter the URL into a web browser

  2. The browser looks at the IP address for the entered domain using the DNS.

  3. The browser then sends the HTTP request to the server.

  4. The server sends back an HTTP response.

  5. With the request, the browser begins rendering the HTML.

  6. Then the browser sends the requests for additional objects embedded in the HTML such as images, CSS, JavaScript, etc.

  7. Finally, the page gets loaded. The browser may send additional async requests if needed.

8. What is distributed cache in Hadoop?

A distributed cache is a facility in the Hadoop MapReduce framework that is used to cache files. These cached files are frequently needed by the applications. It is used to cache read-only files such as text files, archives, jar files, etc. Hadoop will use the cached file for the job on each data node where the map/reduce tasks are running. When the task is completed, these files are deleted from the data nodes. A distributed cache is used because we can send a copy of the file to all data nodes instead of reading the file every time from the HDFS.

9.How Instacart Uses Aws Devops?

Instacart uses AWS Code Deploy to automate deployments for all of its front-end and back-end services. Using AWS Code Deploy has enabled Instacart developers to focus on their product and worry less about deployment operations.

10. What Is Amazon Ec2 In Aws Devops?

Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers.

SOURCES :

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100 points
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