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Exam Overview
Exam Code CRT-600
Exam Name Certification Preparation for Salesforce JavaScript Developer I
Vendor Salesforce
Total Questions 234
Last Updated 26-Oct, 2026
Free CRT-600 Questions Get Premium Access
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Free CRT-600 Practice Questions

Explore 5 free practice questions for the Salesforce CRT-600 exam and review the answers and explanations to support your preparation.

  1. Question 1

    Single answer

    Refer to the code below: 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?

    • Option A:
      assert (number % 2 === 0);
      Correct
    • Option B:
      console.error(number % 2 === 0);
      Correct
    • Option C:
      console.debug(number % 2 === 0);
      Correct
    • Option D:
      console.assert(number % 2 === 0);
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: B

  2. Question 2

    Single answer

    Refer to the code below: 01 let car1 = new promise((_, reject) => 02 setTimeout(reject, 2000, “Car 1 crashed in”)); 03 let car2 = new Promise(resolve => setTimeout(resolve, 1500, “Car 2 completed”)); 04 let car3 = new Promise(resolve => setTimeout (resolve, 3000, “Car 3 Completed”)); 05 Promise.race([car1, car2, car3]) 06 .then(value => ( 07 let result = $(value) the race. `; 08 )) 09 .catch( arr => ( 10 console.log(“Race is cancelled.”, err); 11 )); What is the value of result when Promise.race executes?

    • Option A:
      Car 3 completed the race.
      Correct
    • Option B:
      Car 1 crashed in the race.
      Correct
    • Option C:
      Car 2 completed the race.
      Correct
    • Option D:
      Race is cancelled.
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: C

  3. Question 3

    Single answer

    Which statement phrases successfully?

    • Option A:
      JSON.parse ( ‘ foo ’ );
      Correct
    • Option B:
       JSON.parse ( “ foo ” );
      Correct
    • Option C:
      JSON.parse( “ ‘ foo ’ ” );
      Correct
    • Option D:
      JSON.parse(‘ “ foo ” ’);
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: D

  4. Question 4

    Multiple answers

    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

    • Option A:
      console.assert(sum3(1, ‘2’)) == 12);
      Correct
    • Option B:
      console.assert(sum3(0)) == 0);
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A

  5. Question 5

    Multiple answers

    Refer to the code below: 01 const exec = (item, delay) =>{ 02 new Promise(resolve => setTimeout( () => resolve(item), delay)), 03 async function runParallel() { 04 Const (result1, result2, result3) = await Promise.all{ 05 [exec (‘x’, ‘100’) , exec(‘y’, 500), exec(‘z’, ‘100’)] 06 );07 return ̀ `parallel is done: $(result1) $(result2)$(result3)`; 08 }}} Which two statements correctly execute the runParallel () function? Choose 2 answers

    • Option A:
      Async runParallel () .then(data);
      Correct
    • Option B:
      runParallel ( ). done(function(data){ return data;});
      Correct
    • Option C:
      runParallel () .then(data);
      Correct
    • Option D:
      runParallel () .then(function(data) return data
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: B, D