What is the right output for the code below?
let count = 0;
const inc = () => ++count;
[inc(), inc(), inc()];
console.log(count);
How do you define a function in JavaScript?
What will be the output of the following code?
JavaScript
const arr = [1, 2, 3, 4, 5, 6];
const result = arr.filter(num => num % 2 === 0)
.map(num => num * 2)
.reduce((acc, curr) => acc + curr, 0);
console.log(result);
What will be the output when factorial(7) is called?
function factorial(n) {
if (n === 0 || n === 1) return 1;
let result = 1;
function recursiveFactorial(n) {
if (n === 2) return;
result *= n;
recursiveFactorial(n - 1);
}
recursiveFactorial(n);
return result;
}
console.log(factorial(7));
What will typeof null return?
What happens here?
const x = () => {};
console.log(x.name);
function foo(x, y, z) {
return x + y + z;
}
const bar = foo.bind(null, 1);
console.log(bar(2, 3));
Consider the following code implementation for calculating the factorial of a number using memoization:
JavaScript
function factorial(n, memo = {}) {
if (n <= 1) return 1;
if (memo[n]) return memo[n];
memo[n] = n * factorial(n - 1, memo);
return memo[n];
}
What would happen if you call the function factorial(5) twice without modifying the memo object between the calls?
The second call to factorial(5) will compute all the values again.
The second call to factorial(5) will return the result immediately from the memo object without recomputing.
The second call to factorial(5) will throw an error due to an invalid memoization structure.
The second call to factorial(5) will return undefined.
What is the output?
(function f(){
console.log(typeof f);
})();
What will the following code output?
JavaScript
const add = (a, b) => a + b;
console.log(add(5));
There are 10 questions to complete.
Take a part in the ongoing discussion
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4