
JavaScript
Quiz
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Other
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Professional Development
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Practice Problem
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Medium
Tautvydas Dulskis
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kas yra callback funkcija JavaScript?
Greitas atsakymo grąžinimo metodas
Funkcija, kuri yra perduodama kaip argumentas kitai funkcijai
Funkcija, kuri iškviečiama automatiškai
Funkcija, kuri atlieka ciklinius veiksmus
Answer explanation
Callback funkcija yra funkcija, kuri yra perduodama kaip argumentas kitai funkcijai, kad būtų iškviesta vėliau.
https://developer.mozilla.org/en-US/docs/Glossary/Callback_function
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kokiu būdu yra išvardinami masyvo elementai?
forEach()
for()
while()
iterate()
Answer explanation
Masyvo elementai gali būti išvardinti naudojant forEach() metodą, kuris eina per kiekvieną masyvo elementą.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kaip galime pakeisti HTML elemento tekstą su JavaScript?
document.getElement("elementID").innerText = "Naujas tekstas";
document.getElementById("elementID").textContent = "Naujas tekstas";
document.getElement("elementID").innerHTML = "Naujas tekstas";
document.getElementById("elementID").innerHTML = "Naujas tekstas";
Answer explanation
innerHTML yra savybė, kuri leidžia pakeisti HTML elemento turinį, įskaitant tekstą ir elementus.
https://developer.mozilla.org/en-US/docs/Web/API/Element/innerHTML
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kokiu būdu galima pridėti naują HTML elementą prie esamo elemento?
document.getElementById("elementID").add("p");
document.getElementById("elementID").appendChild("p");
document.getElementById("elementID").insertElement("p");
document.getElementById("elementID").append("p");
Answer explanation
append() funkcija yra naudojama pridėti naują HTML elementą prie esamo elemento.
https://developer.mozilla.org/en-US/docs/Web/API/Element/append
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kaip sukurti ir pridėti naują HTML elementą su JavaScript?
let newElement = document.createElement("tag"); document.body.appendChild(newElement);
let newElement = document.newElement("tag"); document.body.appendChild(newElement);
let newElement = document.createElement("tag"); document.body.addElement(newElement);
let newElement = document.newElement("tag"); document.body.addElement(newElement);
Answer explanation
Naujas HTML elementas gali būti sukurtas naudojant document.createElement() metodą ir pridėtas naudojant appendChild() metodą.
https://developer.mozilla.org/en-US/docs/Web/API/Document/createElement
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kaip sukurti event listener JavaScript?
element.addEventListener("click", functionName);
element.on("click", functionName);
element.bind("click", functionName);
element.click(functionName);
Answer explanation
Event listener galima sukurti naudojant addEventListener() metodą, kuris priima įvykio pavadinimą ir funkciją, kuri bus iškviesta įvykus įvykiui.
https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kaip sukurti for ciklą JavaScript?
for (let i = 0; i < 10; i++) { }
for (i = 0; i < 10; i++) { }
for i = 0; i < 10; i++ { }
for (i = 0; i < 10; i++) { }
Answer explanation
For ciklas JavaScript gali būti sukurtas naudojant for raktažodį, su sąlyga ir iteratoriumi.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#for_statement
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