Java Script Basics

Java Script is a _____typed language

• Statically Typed Language

• Dynamically Typed Language

• Static Class Language

• Dynamic Class Language

Which of the following is NOT a valid JavaScript comparison operator?

• ==

• ===

• >=

• ==!

What will the following code output?

let x = 10; let y = 20;

if (x > y) {

console.log("x is greater than y");

}

else

{ console.log("y is greater than x");

}

• x is greater than y

• y is greater than x

• undefined

• Error

What is the output of the following code snippet?

let a = 5;

let b = 10;

console.log(a != b);

• true

• false

• undefined

• None of the above

What will the following code output?

function greet(name)

{

console.log("Hello " + name);

}

greet("Alice");

• Hello

• Hello Alice

• greet Alice

• Undefined

What will the following code output?

function test(a, b) {

return a + b;

}

console.log(test(1, 2, 3));

• 3

• 6

• Error

• Undefined

Which of the following is a valid way to call a function in JavaScript?

• call myFunction();

• myFunction();

• callFunction(myFunction);

• myFunction.call();

What is the output of the following code?

let i = 0;

while (i < 3)

{

console.log(i);

i++;

}

• 012

• 123

• 0123

• Undefined

Which loop is guaranteed to execute at least once, even if the condition is false initially?

• for

• while

• do while

• for in

What will the following code output?

let arr = [1, 2, 3];

for (let i in arr)

{

console.log(i);

}

• 123

• 012

• 1123

• Undefined