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>> New JS-Dev-101 Test Pattern <<
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NEW QUESTION # 89
A developer writes the code below to return a message to a user attempting to register a new username. If the username is available, a variable named nag is declared and assigned a value on line 03.
What is the value of msg when getAvailableabilityMessage ("newUserName") is executed and get Availability ("newUserName") returns true?
Answer: C
NEW QUESTION # 90
const str = 'Salesforce';
Which two statements result in the word "Sales"?
Answer: B,C
Explanation:
Comprehensive and Detailed
"Salesforce" indices: S(0) a(1) l(2) e(3) s(4) f(5) ...
A / C (substring(0, 5)):
substring(start, end) returns characters from start up to but not including end.
str.substring(0, 5) → characters at indices 0,1,2,3,4 → "Sales".
D (substr(0, 5)):
substr(start, length) returns length characters starting at start.
str.substr(0, 5) → 5 chars from index 0 → "Sales".
B is invalid because s is not defined; it should be 0. So the two correct statements are A and D.
NEW QUESTION # 91
developer removes the HTML class attribute from the checkout button, so now it is simply:
<button>Checkout</button>.
There is a test to verify the existence of the checkout button, however it looks fora button with class= "blue". The test fails because no such button is found.
Which type of test category describes this test?
Answer: B
NEW QUESTION # 92
A developer is setting up a Node.js server and is creating a script at the root of the source code, index.js, that will start the server when executed. The developer declares a variable that needs the folder location that the code executes from.
Which global variable can be used in the script?
Answer: D
Explanation:
In Node.js:
__filename is the absolute path to the current file (including file name).
__dirname is the absolute path to the directory that contains the current file.
window.location is a browser-only global, not available in Node.js.
this.path is not a standard Node.js global for path information.
The requirement is:
"the folder location that the code executes from."
That is exactly what __dirname provides.
So the correct choice is __dirname.
Concepts: Node.js globals, __filename, __dirname, Node vs browser environment.
NEW QUESTION # 93
Console logging methods that allow string substitution:
Answer: A,B,C,D
Explanation:
The correct answers are B, C, D, and E.
JavaScript browser consoles support string substitution in several console output methods. String substitution means using placeholders such as:
%s
%d
%i
%f
%o
%O
%c
Example:
console.log("User name is %s and age is %d", "Alex", 25);
Output:
User name is Alex and age is 25
The valid console methods from the given options are:
Option
Method
Correct?
Reason
A
message
No
console.message() is not a standard console method.
B
log
Yes
console.log() supports formatted string substitution.
C
assert
Yes
console.assert() can output a formatted message when the assertion is false.
D
info
Yes
console.info() supports formatted output like console.log().
E
error
Yes
console.error() supports formatted output and displays an error-style message.
Example with these valid methods:
console.log("Name: %s", "John");
console.info("Score: %d", 95);
console.error("Error code: %d", 500);
console.assert(false, "Failed check for user: %s", "Admin");
So the verified answers are B, C, D, and E.
NEW QUESTION # 94
......
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