Infosys Certified NodeJS Architect
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Real Lex exam-pattern multiple-choice questions for the Infosys Certified NodeJS Architect certification. Each question includes the correct answer. The full question bank is available to Premium members.
- Question 1
Developer of XYZ company decided to use Node.js on the server side to enable the server to serve a huge number of incoming requests concurrently and efficiently. Which of the Node.js feature assists the developer to accomplish this requirement?
- ✓Multithreaded Processing ModelCorrect
- BSingle Threaded Event Loop Model
- CStreaming Model
- DAll the above options
- Question 2
A Node.js developer wants to connect Redis to the localhost on port 6379.What is the correct option to achieve this requirement?
- ✓
const REDIS_PORT = process.env.REDIS_PORT || 6379;
const client = redis.connect(REDIS_PORT);
Correct - B
const REDIS_PORT = process.env.REDIS_PORT || 6379;
const client = redis.createClient(REDIS_PORT);
- C
const REDIS_PORT = process.env.REDIS_PORT || 6379;
const client = redis.bind(REDIS_PORT);
- D
const REDIS_PORT = process.env.REDIS_PORT || 6379;
onst client = redis.createConnection(REDIS_PORT);
- ✓
- Question 3
Which of the below are the advantages of integrating Keycloak authentication in Node.js application?
- ✓Enhanced code organizationCorrect
- BIncreased security
- CUnified user authentication across applications
- DCentralized identity management
- Question 4
Which of the following is a feature of PM2 that can help to improve the performance and reliability of Node.js application?
- ✓Automatic restartsCorrect
- BLoad balancing
- CClustering
- DAll of the above
- Question 5
Which of the following is NOT a task performed in the development stage of an API?
- ✓Coding the APICorrect
- BMocking the API
- CQuality of the API
- DDocumenting the API
- Question 6
You are software developer working on a Node.js application that needs to deal with files having large amounts of data. The application is currently reading the files one by one and processing them. You have been tasked with improving the performance of the file processing process. Which of the following approaches would be more effective?
- ✓Use streamsCorrect
- BUse a caching mechanism
- CStore data in database
- DLoad balancing
- Question 7
A software developer working on a CPU intensive Node.js application that handles scientific computations. Developer wants to improve the performance of the application. Which of the following approaches would be most effective?
- ✓Scaling the applicationCorrect
- BStreams
- CCaching the data
- DWebworker-threads
- Question 8
A software developer wants to understand the purpose of an API and its functional and non-functional requirements. Which phase of the API Lifecycle handles this requirement?
- ✓DevelopCorrect
- BPlan
- CDesign
- DTest
- Question 9
Event Loop allows NodeJS to perform non-blocking I/O operations and it undergoes several phases while its execution.
Which of the following is the correct order of phases in the Node.js Event Loop?
- ✓Timers, Pending callbacks, Poll, Check, Close callbacksCorrect
- BPending callbacks, Timers, Check, Poll, Close callbacks
- CPending callbacks, Poll, Check, Timers, Close callbacks
- DTimers, Poll, Pending callbacks, Close callbacks, Check
- Question 10
You are required to develop a real-time multi-player game using Node.js where players will be interacting with each other. You need to accommodate large numbers of concurrent players and need to ensure low latency. How can clustering help in optimizing the performance of the application in this context?
- ✓Clustering can help you to create multiple instances to handle multi-player interactions. This way you can ensure low latency.Correct
- BClustering can be used to render quality graphics for the game, which can bring in more visual appeal, thereby assisting in low latency.
- CClustering can assist in better database interactions thereby managing player data/load and assisting in low latency.
- DClustering can help in distributing players across various other games so that overcrowding can be prevented, and performance can be maintained.
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