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Javascript | Control Flow
Question 1
What is the role of break keyword inside a loop?
- A
Restart the loop
- B
Move out of the loop
- C
Ignore the rest of the statements below it and continue the loop
- D
None of the above
Question 2
What will be the output of the following code snippet?
let data = 7
while(data>=0){
if (data<=5){
data--;
continue;
}
console.log(data);
data--;
}
- A
7 6 5 4 3 2 1 0
- B
7 6 5
- C
7 6
- D
0 1 2 3 4 5
Question 3
What will be the output for the following code snippet?
let i = 5;
while (true) {
console.log(i);
i += 5;
if (i > 30) {
break;
}
}
- A
Infinite loop
- B
5 10 15 20 25 30
- C
5 10 15 20 25
- D
5 10 15 20 25 30 35
Question 4
Which of the following is NOT a valid conditional statement in JavaScript?
- A
if
- B
else if
- C
switch
- D
elseif
Question 5
Which loop always executes at least once, even if the condition is false?
- A
for
- B
while
- C
do...while
- D
for...in
Question 6
What will the following code output?
for (let i = 0; i < 3; i++) {
if (i === 1) break;
console.log(i);
}
- A
0, 1, 2
- B
0
- C
1
- D
0, 1
Question 7
When is a switch statement generally preferred over an if-else statement in JavaScript?
- A
When checking for a single condition
- B
When comparing a single variable against multiple specific values
- C
When performing complex logical operations
- D
When iterating over arrays
Question 8
What is the output of the following code?
let age = 20;
let status = age >= 18 ? "Adult" : "Minor";
console.log(status);
- A
Adult
- B
Minor
- C
undefined
- D
Error
Question 9
Which statement is used to throw a custom error in JavaScript?
- A
throw
- B
error
- C
catch
- D
raise
Question 10
What does this code output?
let score = 85;
let grade = score >= 90 ? "A" : score >= 80 ? "B" : "C";
console.log(grade);
- A
A
- B
B
- C
C
- D
Error
There are 10 questions to complete.