Salesforce Javascript-Developer-I Question Answers

Question # 41

Refer to the code below: 
 

 What is the value of result when the code executes? 
 

A. 10-10
B. 5-5
C. 10-5
D. 5-10

Show / Hide Answer

---

Question # 42

Which statement accurately describes an aspect of promises? 
 

A. Arguments for the callback function passed to .then() are optional.
B. In a.then() function, returning results is not necessary since callbacks will catch theresult of a previous promise.
C. .then() cannot be added after a catch.
D. .then() manipulates and returns the original promise.

Show / Hide Answer

---

Question # 43

Refer to the code below? LetsearchString = ‘ look for this ’; Which two options remove the whitespace from the beginning of searchString? Choose 2 answers 
 

A. searchString.trimEnd();
B. searchString.trimStart();
C. trimStart(searchString);
D. searchString.replace(/*\s\s*/, ‘’);

Show / Hide Answer

---

Question # 44

developer wants to use a module nameduniversalContainersLib and them call functions from it. How should a developer import every function from the module and then call the fuctions foo and bar ? 
 

A. import * ad lib from ‘/path/universalContainersLib.js’;lib.foo();lib.bar();
B. import (foo, bar) from ‘/path/universalContainersLib.js’;foo();bar();
C. import all from ‘/path/universalContaineraLib.js’;universalContainersLib.foo();universalContainersLib.bar();
D. import * from ‘/path/universalContaineraLib.js’;universalContainersLib.foo();universalContainersLib.bar();

Show / Hide Answer

---

Question # 45

Which statement phrases successfully? 
 

A. JSON.parse ( ‘ foo ’ );
B. JSON.parse ( “ foo ” );
C. JSON.parse( “ ‘ foo ’ ” );
D. JSON.parse(‘ “ foo ” ’);

Show / Hide Answer

---

Question # 46

Which two console logs outputs NaN? Choose 2 answers 
 

A. console.log(10/ Number(‘5’));
B. console.log(parseInt(‘two’));
C. console.log(10/ ‘’five);
D. console.log(10/0);

Show / Hide Answer

---

Question # 47

Which two console logs outputs NaN? Choose 2 answers 
 

A. console.log(10/ Number(‘5’));
B. console.log(parseInt(‘two’));
C. console.log(10/ ‘’five);
D. console.log(10/0);

Show / Hide Answer

---

Question # 48

Which option is true about the strict mode in imported modules? 
 

A. Add the statement use non-strict, before any other statements in the module to enablenot-strict mode.
B. You can only reference notStrict() functions from the imported module.
C. Imported modules are in strict mode whether you declare them as such or not.
D. Add the statement use strict =false; before any other statements in the module to enablenot- strict mode.

Show / Hide Answer

---

Question # 49

Universal Containers (UC) notices that its application that allows users to search for accounts makes a network request each time a key is pressed. This results in too many requests for the server to handle.  Address this problem, UCdecides to implement a debounce function on string change handler. What are three key steps to implement this debounce function? Choose 3 answers: 
 

A. If there is an existing setTimeout and the search string change, allow the existingsetTimeout to finish,and do not enqueue a new setTimeout.
B. When the search string changes, enqueue the request within a setTimeout.
C. Ensure that the network request has the property debounce set to true.
D. If there is an existing setTimeout and the search string changes,cancel the existingsetTimeout using the persisted timerId and replace it with a new setTimeout.
E. Store the timeId of the setTimeout last enqueued by the search string change handle.

Show / Hide Answer

---

Question # 50

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? 
 

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

Show / Hide Answer

---

<123456>

---

Download All 147 Questions Check Customers Feedbacks