Coding and Decoding practice questions with answers

51 questions arranged into 4 focused exercises. Work in learning mode to review answers and explanations, or choose timed mode before starting.

Read theory

Learn coding and decoding with concept notes and worked examples, then practise focused questions with explained answers. Build accuracy for placement and competitive aptitude tests before trying timed mode.

Exercise 1Questions 1–15

Exercise 1

15 questions · about 18 minutes

5 easy · 10 medium · 0 hard
15 MCQ
Not attemptedStart
Exercise 2Questions 16–30

Exercise 2

15 questions · about 18 minutes

5 easy · 10 medium · 0 hard
15 MCQ
Not attemptedStart
Exercise 3Questions 31–45

Exercise 3

15 questions · about 18 minutes

5 easy · 10 medium · 0 hard
15 MCQ
Not attemptedStart
Exercise 4Questions 46–51

Exercise 4

6 questions · about 8 minutes

1 easy · 5 medium · 0 hard
6 MCQ
Not attemptedStart