Lernplattform fur Interviewvorbereitung, Online-Tests, Tutorials und Live-Ubungen

Baue deine Fahigkeiten mit fokussierten Lernpfaden, Probetests und interviewreifem Inhalt aus.

WithoutBook vereint themenbezogene Interviewfragen, Online-Ubungstests, Tutorials und Vergleichsleitfaden in einem responsiven Lernbereich.

Bibliothek durchsuchen

Interview vorbereiten

JavaScript Interviewfragen und Antworten

Test your skills through the online practice test: JavaScript Quiz Online Practice Test

Verwandte Vergleiche

1
2
3
4
5
6
7
8
9
10
11
12

Frage 16. What type of variables are in Javascript?

Must declare variables before they’re used in the program
Declare at the top of the program & terminate each statement with ‘;’
Intialize variables when appropriate
Local variables (declared within a function) destroyed after function exit.
Can only be accessed within the function

Example – Note Assignments
var candyBarPrice = 2.50;
var taxRate = .075;
var candyBarsPurchased;

Ist das hilfreich? Ja Nein Kommentar hinzufugen Kommentare ansehen

Frage 17. What is Assignment Operator in Javascript?

Assignment ‘looks like’ equal sign but does NOT behave like it

subTotal = subTotal + 1.50

subTotal ‘is assigned the value’ that is currently in subTotal plus the value of 1.50

Ist das hilfreich? Ja Nein Kommentar hinzufugen Kommentare ansehen

Frage 18. What is Expression in Javascript?

An expression is a statement that describes a computation.
Usually look like algebra formulas
total = subTotal * taxRate
Operators (+, -, *, /, etc.) have different levels of precedence, similar to algebra
Don’t rely on it! For clarity, use parentheses.

Ist das hilfreich? Ja Nein Kommentar hinzufugen Kommentare ansehen

Frage 19. Explain String in Javascript?

Strings are sequences of keyboard characters enclosed in quotes
“Hello World” or ‘Hello World’

Variables can hold strings
var greeting = “Hello World”

String can be empty, i.e., contain no characters
var myAnswer = “”

Use ‘\’ (escape symbol) to ‘type’ prohibited characters
\b for backspace, \n for newline, \t for tab, \” for double quote.

Ist das hilfreich? Ja Nein Kommentar hinzufugen Kommentare ansehen

Frage 20. What is Date class in Javascript? Please explain.

to create a Date object, use new & supply year/month/day/… as desired

today = new Date(); // sets to current date & time

newYear = new Date(2002,0,1); //sets to Jan 1, 2002 12:00AM

methods include:

newYear.getYear() can access individual components of a date
newYear.getMonth()
newYear.getDay()
newYear.getHours()
newYear.getMinutes()
newYear.getSeconds()
newYear.getMilliseconds()

Ist das hilfreich? Ja Nein Kommentar hinzufugen Kommentare ansehen

1
2
3
4
5
6
7
8
9
10
11
12

Am hilfreichsten laut Nutzern:

Copyright © 2026, WithoutBook.

JavaScript vs Jquery	JavaScript vs VBScript	JavaScript vs TypeScript