Prefix Calculator Program plan: Include necessary header files. Define the class “PreficCalc”. Declare the necessary variables. Define the method “start()”. Create labels and text fields to enter the prefix expression. Create a button “evaluate” to submit and calculate the resultant value. Define the class “CmdTextListener”. Define the method “handle()”. Declare the string variable to get a prefix expression. Declare the method “buildExpr()” to read and build a binary tree. Declare the method “eval()” to evaluate the tree expression. Display the result into the resultant text field. Define the method “eval()” to evaluate the expression. The “if” statement check, left and right child of tree is equal to null. True, return the integer value. Otherwise, Call the method “eval()” and assign the result into “leftOp”. Call the method “eval()” and assign the result into “rightOp”. The “if” statement check, tree value is equal to “*”. True, return the multiplied value. The “if” statement check, tree value is equal to “+”. True, return the added value. Return “0”. Define the method “isNumber()”. If the given expression is number then, return the number itself. Define the class “Node”. Declare the necessary variables. Define the parameterized constructor. Define the method “buildExpr()” to read and build a binary tree. Read the input from the user. The “if” statement check the expression is number. True, return the node itself. Otherwise, build a non-leaf tree. Call the method “Node()” and return a value. Define the “main()” method. Declare the method “launch()” to call the “start()” method eventually.

Question

Problem Statement You are working as a Devops Administrator. Y ou’ve been t asked to deploy a multi - tier application on Kubernetes Cluster. The application is a NodeJS application available on Docker Hub with the following name: d evopsedu/emp loyee This Node JS application works with a mongo database. MongoDB image is available on D ockerHub with the following name: m ongo You are required to deploy this application on Kubernetes: • NodeJS is available on port 8888 in the container and will be reaching out to por t 27017 for mongo database connection • MongoDB will be accepting connections on port 27017 You must deploy this application using the CL I . Once your application is up and running, ensure you can add an employee from the NodeJS application and verify by going to Get Employee page and retrieving your input. Hint: Name the Mongo DB Service and deployment, specifically as “mongo”.

Answer 1

Question

Chapter 21, Problem 4PC

Program Plan Intro

Prefix Calculator

Program plan:

Include necessary header files.

Define the class “PreficCalc”.

Declare the necessary variables.

Define the method “start()”.

Create labels and text fields to enter the prefix expression.

Create a button “evaluate” to submit and calculate the resultant value.

Define the class “CmdTextListener”.

Define the method “handle()”.

Declare the string variable to get a prefix expression.

Declare the method “buildExpr()” to read and build a binary tree.

Declare the method “eval()” to evaluate the tree expression.

Display the result into the resultant text field.

Define the method “eval()” to evaluate the expression.

The “if” statement check, left and right child of tree is equal to null.

True, return the integer value.

Otherwise,

Call the method “eval()” and assign the result into “leftOp”.

Call the method “eval()” and assign the result into “rightOp”.

The “if” statement check, tree value is equal to “*”.

True, return the multiplied value.

The “if” statement check, tree value is equal to “+”.

True, return the added value.

Return “0”.

Define the method “isNumber()”.

If the given expression is number then, return the number itself.

Define the class “Node”.

Declare the necessary variables.

Define the parameterized constructor.

Define the method “buildExpr()” to read and build a binary tree.

Read the input from the user.

The “if” statement check the expression is number.

True, return the node itself.

Otherwise, build a non-leaf tree.

Call the method “Node()” and return a value.

Define the “main()” method.

Declare the method “launch()” to call the “start()” method eventually.

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