Module quiz: Introduction to data structures :Coding Interview Preparation (Meta iOS Developer Professional Certificate) Answers 2026

Question 1

What should be done when presented with a technical problem where the solution is not immediately obvious?

✅ Ask questions.
❌ Move the conversation along and try not to draw attention.
❌ Ask the interviewer how they would solve the problem.

Explanation:
Asking clarifying questions demonstrates logical thinking, curiosity, and good communication skills.

Question 2

During a technical interview, is it better to rely on the work of others, or code everything yourself?

❌ Use code written by others.
✅ Use the data structures, but don’t use any other external implementation.
❌ Write as much code as you can to show off your skills.

Explanation:
Interviewers want to see your problem-solving ability, not copied solutions.

Question 3

Given an array of sock colors:
[3,3,2,1,1,3,5,1,4,2]
How many pairs exist?

❌ 4
❌ 2
✅ 3

Explanation:
Pairs formed:

• Color 3 → 1 pair

• Color 1 → 1 pair

• Color 2 → 1 pair
  Total = 3 pairs

Question 4

It is best to remain silent when writing code during a technical interview.

❌ True
✅ False

Explanation:
Thinking aloud helps interviewers understand your approach and decision-making.

Question 5

Should I ask questions in an interview?

❌ Run down the clock
❌ Only when it helps the interviewer
✅ Yes. Ask questions for clarity or during an appropriate time.

Explanation:
Asking relevant questions shows engagement and professionalism.

Question 6

What is the STAR method?

✅ A structured approach to answering questions.
❌ A stellar answer to a good question.
❌ A coding practice with 4 key components.

Explanation:
STAR stands for Situation, Task, Action, Result — commonly used in behavioral interviews.

Question 7

What is meant by transfer rate in relation to a CPU?

✅ The rate at which memory is transferred into cache.
❌ The rate at which instructions are processed.
❌ The rate at which terminal input is converted.

Explanation:
Transfer rate refers to data movement speed, not execution speed.

Question 8

When engaged in a coding interview, what tests should you aim to include?

❌ Integration tests
❌ Functional tests
✅ Unit tests

Explanation:
Unit tests are quick, focused, and show correctness of logic.

Question 9

Which memory location is closest to the CPU?

❌ Main memory
❌ Secondary memory
✅ Cache

Explanation:
Cache memory is the fastest and closest to the CPU.

Question 10

When designing a solution it is best to:

❌ Tackle every problem as it arises.
✅ Plan an outline, identify obstacles, explore solutions, and review continuously.
❌ Do a quick sketch then implement everything immediately.

Explanation:
Structured planning leads to efficient and maintainable solutions.

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