Control Statements and Iteration Interview Questions Mock Test

Question 1: If-Else Condition

What will be the output of:

let x = 10;
if (x > 15) {
  console.log("Big");
} else {
  console.log("Small");
}

Question 2: Switch Statement Default

What will be the output?

let fruit = "apple";
switch(fruit) {
  case "banana": console.log("Yellow"); break;
  case "orange": console.log("Orange"); break;
  default: console.log("Unknown");
}

Question 3: For Loop Execution

How many times will this loop run?

for (let i = 0; i < 5; i++) {
  console.log(i);
}

Question 4: JS While Loop

What is the output?

let i = 0;
while (i < 3) {
  console.log(i);
  i++;
}

Question 5: Do-While Loop Execution

What is the output?

let i = 5;
do {
  console.log(i);
  i++;
} while (i < 5);

Question 6: For...of Loop

What is the output?

let arr = ["a", "b", "c"];
for (let val of arr) {
  console.log(val);
}

Question 7: for...in Loop

Which loop is used to iterate over object properties?

Question 8: Break Statement

What does the break statement do inside a loop?

Question 9: JS Continue Statement

What is the output?

for (let i = 0; i < 5; i++) {
  if (i === 2) continue;
  console.log(i);
}

Question 10: Nested Loop Execution

How many times will "Hello" be printed?

for (let i = 0; i < 2; i++) {
  for (let j = 0; j < 3; j++) {
    console.log("Hello");
  }
}