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1722 questions
User Input - User interface contains two types of user input controls: TextInput, which accepts all characters and NumericInput, which accepts only digits. Implement the class TextInput that contains: Public sub Add(c As Char) - adds the given character to the current value Public function GetValue() As String - returns the current value Implement the class NumericInput that: Inherits TextInput Overrides the Add method so that each non-numeric character is ignored For example, the following code should output "10": Dim input As TextInput = New NumericInput() input.Add(CChar("1")) input.Add(CChar("a")) input.Add(CChar("0")) Console.WriteLine(input.GetValue())
VB.NET
Inheritance
OOP
Easy
15 min
code
Public
User Input - A user interface contains two types of user input controls: TextInput, which accepts all characters and NumericInput, which accepts only digits. Implement the class TextInput that contains: Method add(self, character) - adds the given character to the current value Method get_value(self) - returns the current value Implement the class NumericInput that: Inherits TextInput Overrides the add method so that each non-numeric character is ignored For example, the following code should output "10": input = NumericInput() input.add("1") input.add("a") input.add("0") print(input.get_value())
New
Python
Inheritance
OOP
Easy
15 min
code
Public
Http Server - A company hosts its website and a product API on same server using the code below: let http = require("http"); let commonResponse = function(response){ response.writeHead(200, { "Content-Type": "text/html" }); response.write("Request Completed"); } let handleApi = function(req, res){ if(req.method == "POST"){ commonResponse(res); res.end(); } } let handleWeb = function(req, res){ commonResponse(res) res.end(); } http.createServer(handleApi).listen(4513); http.createServer(handleWeb).listen(4514); Select all the correct answers.
Node.js
Standard Library
Easy
5 min
mca
Public
Toggle Message - The Message component contains an anchor element and a paragraph below the anchor. Rendering of the paragraph should be toggled by clicking on the anchor element using the following logic: At the start, the paragraph should not be rendered. After a click, the paragraph should be rendered. After another click, the paragraph should not be rendered. Finish the Message component by implementing this logic.
React
Conditional Rendering
Event Handling
Managing State
Easy
10 min
code
Public
Grocery Database - A grocery shop is using the following tables in its relational database: TABLE Product   id INTEGER   name VARCHAR categoryId INTEGER REFERENCES ProductCategory(id) TABLE ProductCategory   id INTEGER   name VARCHAR TABLE ProductSale   id INTEGER   productId INTEGER REFERENCES Product(id)   price DECIMAL   date DATE The company has decided to implement a data warehouse since their analytic queries to get sales information have started causing issues by consuming most database resources. As a first step, the company wants to create a star schema of the previous tables. Which tables should be present in the star schema?
Data Warehouse
Star Schema
Easy
5 min
mca
Public
Lumber Cut - A construction supply company wants to implement a data warehouse to analyze the performance of their online portal for ordering custom cuts of lumber. Their sales data is currently stored in two separate transaction processing relational databases, one contains inventory and the other one contains sales data. Both databases save their data in a normalized schema. One of the reasons for implementing a data warehouse is that it takes too much time to query the databases for average sales data and inventory status, which causes some online transactions to timeout. How should the data warehouse be implemented?
New
Data Warehouse
Software Architecture
Easy
3 min
mca
Public
Image Gallery App - An image gallery is a set of images with corresponding remove buttons. This is the HTML code for a gallery with two images: <div> <div class="image"> <img src="https://bit.ly/3lmYVna"> <button class="remove">X</button> </div> <div class="image"> <img src="https://bit.ly/3flyaMj"> <button class="remove">X</button> </div> </div> Implement the ImageGallery component that accepts a links input and renders the gallery described above so that the first item in the links input is the src attribute of the first image in the gallery. It should also implement the following logic: When the button is clicked, the image that is in the same div as the button should be removed from the gallery. For example, after the first image has been removed from the gallery above, it's HTML code should look like this: <div> <div class="image"> <img src="https://bit.ly/3flyaMj"> <button class="remove">X</button> </div> </div> The code for running the example case locally is provided here.
New
Angular
Components
Directives
Event Binding
Event Handling
One-Way Binding
Hard
30 min
code
Public
Spot the Duplicates 1 - Select the tile below that should be placed in the unknown tile above so that all three rows above follow the same pattern.
Abstract Reasoning
Duplicate Elements
Three Horizontal Rows
Easy
2 min
mcq
Public
Meteorologist Dashboard - A web application for a meteorologist's dashboard uses a Redux store to manage temperature data. The Redux store is configured with the Redux toolkit where the latest temperature data is fetched using the Redux thunk function. Below is the code for the store's configuration: const weatherURL = "http://example.com/temperaturejson"; const fetchTemperature = createAsyncThunk( "weather/fetchTemperature", async (arg, thunkAPI) => { const response = await fetch(weatherURL); return response.json(); } ); const temperatureSlice = createSlice({ name: "temperature", initialState: { temperature: 0 }, reducers: {}, extraReducers: (builder) => { builder.addCase(fetchTemperature.fulfilled, (state, action) => { state.temperature = action.payload.temperature; }); builder.addCase(fetchTemperature.pending, (state, action) => { state.temperature = "loading"; }); builder.addCase(fetchTemperature.rejected, (state, action) => { console.log(action); state.temperature = "unavailable"; }); }, }); const weatherStore = configureStore({ reducer: temperatureSlice.reducer }); What is true about the behavior of weatherStore?
New
Redux Toolkit
Redux Store
Thunk
Easy
5 min
mca
Public
Environment - The PATH variable is set in /etc/environment:  PATH="/usr/local/sbin:/usr/local/bin:/usr/games:/usr/local/games" And updated in .bash_profile: export PATH=/usr/temp:$PATH:/usr/local/apps Select the statements are correct.
Bash
Environmental Variable
Easy
3 min
mca
Public
Semantics - Update the website's HTML, without using JavaScript or CSS, to make use of semantic elements so that: The classless outer div element is replaced with a more appropriate element. The divs with the image and caption classes are replaced with self-contained content elements. The divs with the lorem-ipsum and description classes are replaced with elements, so that by default only the contents of the description element are shown. When the contents of the description element are clicked, the visibility of the rest of the lorem-ipsum element is toggled.
HTML/CSS
Elements and Attributes
HTML5
Semantic Tags
Easy
7 min
code
Public
Late Installation - You are on the support team for a cable/internet company and you have received the following email from a customer, Mike Smith: I am very upset that your installation tech did not come to my home today at the appointed time. I took time off from work, all for no reason! I was told he should arrive between 12:00 and 5:00. He didn’t get here until 5:45. I could have just stayed at work since I normally get home at 5:30. This is not a good way to start my new service with you and I am already considering canceling! A quick check of the notes on the customer’s account shows that the tech was scheduled to arrive ideally between 12:00 and 5:00pm, but didn’t get there until about 5:45 because of heavy traffic resulting from a car accident on one of the major crosstown roadways. Please draft your response to this customer in the box below.
Customer Emails
Angry Customer
Cancellation Threats
Customer Service
Manually Scored
Easy
7 min
text
Public
Binary Search Tree - Binary search tree (BST) is a binary tree where the value of each node is larger or equal to the values in all the nodes in that node's left subtree and is smaller than the values in all the nodes in that node's right subtree. Write a function that, efficiently with respect to time used, checks if a given binary search tree contains a given value. For example, for the following tree: n1 (Value: 1, Left: null, Right: null) n2 (Value: 2, Left: n1, Right: n3) n3 (Value: 3, Left: null, Right: null) Call to contains(n2, 3) should return True since a tree with root at n2 contains number 3.
Python
Algorithmic Thinking
Recursion
Tree
Easy
15 min
code
Public
Argumentative Essay - An author writes an argumentative essay to persuade readers to agree with a claim about a topic. When writing an argumentative essay, it's important to establish credibility with readers to convince them that the author is trustworthy. True statements, accurate evidence, and clear logic increase an author's credibility. However, false statements, inaccurate evidence, and unclear logic make an author less credible. With lower credibility, an author is less likely to persuade readers to agree with a claim--even when it is trustworthy. Select the statement that most effectively summarizes the above text:
Verbal Reasoning
Most Effective Summary
Easy
3 min
mcq
Public
Thesaurus - A thesaurus contains words and synonyms for each word. Below is an example of a data structure that defines a thesaurus: array("buy" => array("purchase"), "big" => array("great", "large")) Implement the function getSynonyms, which accepts a word as a string and returns all synonyms for that word in JSON format, as in the example below. For example, the call $thesaurus->getSynonyms("big") should return: '{"word":"big","synonyms":["great", "large"]}' while a call with a word that doesn't have synonyms, like $thesaurus->getSynonyms("agelast") should return: '{"word":"agelast","synonyms":[]}'
PHP
JSON
Serialization
Hard
10 min
code
Public
Rolling Dice - While waiting at the Doctor's office, Sam played a game with the following rules: He rolled a fair six-sided dice. When he rolled an odd number, he marked that game as a loss. When he rolled an even number, another fair six-sided dice was rolled. If that second roll was the same number as the first roll, he marked that game as a win. Otherwise, the game was marked as a loss. What is the probability, as a percentage rounded to the nearest integer, of winning the game?
Engineering Math
Probability
Easy
5 min
num
Public
CEO Announcement - "Today the CEO announced that the company will ______ into Europe next year." Which words best complete the blank in the sentence above?
English Comprehension
Synonym
Vocabulary
Easy
1 min
mca
Public
Parsing XML - Which statements are true for the .NET technologies you can use to process XML data?
.NET
Class Library
Serialization
XML
Hard
2 min
mca
Public
Pricing Page - You were testing two new title ideas for a pricing page with the following results:   Views Conversions Original 4,300 436 Proposal A 4,000 440 Proposal B 3,700 415
A/B Testing
Results Analysis
Statistical Significance
Easy
5 min
mmcq
Public
Account - Each account on a website has a set of access flags that represent a users access. Update and extend the enum so that it contains three new access flags: A Writer access flag that is made up of the Submit and Modify flags. An Editor access flag that is made up of the Delete, Publish and Comment flags. An Owner access that is made up of the Writer and Editor flags. For example, the code below should print "False" as the Writer flag does not contain the Delete flag. Console.WriteLine(Access.Writer.HasFlag(Access.Delete))
C#
Enum
Hard
7 min
code
Public