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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q219-Q224):

NEW QUESTION # 219
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 turn around 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?

A. DEBUG =true node server.js
B. NODE_DEBUG =http, https node server.js
C. NODE_DEBUG =true node server.js
D. DEBUG = http, https node server.js

Answer: A

NEW QUESTION # 220
Considering the implications of 'use strict' on line 04, which three statements describe the execution of the code?
Choose 3 answers

A. 'use strict' is hoisted, so it has an effect on all lines.
B. Line 05 throws an error.
C. z is equal to 3.14.
D. 'use strict' has an effect only on line 05.
E. 'use strict' has an effect between line 04 and the end of the file.

Answer: B,C,D

NEW QUESTION # 221
Refer to the following code block:

What is the console output?

A. > Uncaught Reference Error
B. > Better student Jackie got 100% on test.
C. > Better student Jackie got 70% on test.
D. > Jackie got 70% on test.

Answer: B

NEW QUESTION # 222
Refer to thefollowing code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers

A. const foo = () => { return 'foo';}const bar = () => {return 'bar'; }Export default foo, bar;
B. const foo = () => { return 'foo' ; }const bar = () => { return 'bar' ; }export { bar, foo }
C. // FooUtils.js and BarUtils.js existImport (foo) from '/path/FooUtils.js';Import (boo) from ' /path/NarUtils.js';
D. Export default class {foo() { return 'foo' ; }bar() { return 'bar' ; }}

Answer: B,D

NEW QUESTION # 223
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK';
Throw new Error('not OK');
)
Which assertion accurately tests the above code?

A. Console.assert (await functionUnderTest(true), ' not OK ')
B. Console.assert (await functionUnderTest(true), ' OK ')
C. Console.assert (await functionUnderTest(true), ' notOK ')
D. Console.assert (await functionUnderTest(true), 'OK')

Answer: D

NEW QUESTION # 224
......

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