Javascript Developer I Certification Exam Practice Tests & PDFs

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Practice makes perfect! Take this quiz now to test your knowledge and boost your confidence for the real exam.

1 / 5

Which statement phrases successfully?

A. JSON.parse(‘ “ foo ” ’);

B. JSON.parse ( “ foo ” );

C. JSON.parse( “ ‘ foo ’ ” );

D. JSON.parse ( ‘ foo ’ );

2 / 5

for(let number =2 ; number <= 5 ; number += 1 ) { // insert code statement here } The developer needs to insert a code statement in the location shown. The code statement has these requirements: 1. Does require an import 2. Logs an error when the boolean statement evaluates to false 3. Works in both the browser and Node.js Which meet the requirements?

A. console.assert(number % 2 === 0);

B. console.debug(number % 2 === 0);

C. console.error(number % 2 === 0);

D. assert (number % 2 === 0);

3 / 5

4 / 5

5 / 5

A developer needs to test this function: 01 const sum3 = (arr) => ( 02 if (!arr.length) return 0, 03 if (arr.length === 1) return arr[0], 04 if (arr.length === 2) return arr[0] + arr[1], 05 return arr[0] + arr[1] + arr[2], 06 ); Which two assert statements are valid tests for the function? Choose 2 answers

A. console.assert(sum3(1, ‘2’)) == 12);

B. console.assert(sum3(-3, 2 )) == -1);

C. console.assert(sum3(0)) == 0);

D. console.assert(sum3(‘hello’, 2, 3, 4)) === NaN);

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Javascript Developer I