250-434 Developer Practice Questions

Which function should a developer use to repeatedly execute code at a fixed interval ?

• AA. setIntervel
• BB. setTimeout
• CC. setPeriod
• DD. setInteria

Why would a developer specify a package.jason as a developed forge instead of a dependency ?

• AA. It is required by the application in production.
• BB. It is only needed for local development and testing.
• CC. Other requiredpackages depend on it for development.
• DD. It should be bundled when the package is published.

A developer has a web server running with Node.js. The command to start the web server is node server.js. The web server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround. Which command can the web developer run to see what the module is doing during the latency period?

• AA. NODE_DEBUG=true node server.js
• BB. DEBUG=http, https node server.js
• CC. NODE_DEBUG=http,https node server.js
• DD. DEBUG=true node server.js

A developer creates an object where its properties should be immutable and prevent properties from being added or modified. Which method shouldbe used to execute this business requirement ?

• AA. Object.const()
• BB. Object.eval()
• CC. Object.lock()
• DD. Object.freeze()