Control Structures: Sequence, Selection and Repetition

Question 1

Which control structure carries out steps one after another in order?

Accepted Answer

Sequence — Sequence runs the instructions in the order they are written.

Question 2

Which control structure chooses between different paths using a condition?

Accepted Answer

Selection — Selection uses a condition (IF) to decide which path to take.

Question 3

A structure that repeats a block of instructions is called:

Accepted Answer

Repetition — Repetition (a loop) runs the same steps many times.

Question 4

"IF mark >= 50 THEN print Pass ELSE print Fail" is an example of:

Accepted Answer

Selection — The IF...ELSE chooses one of two paths, which is selection.

Question 5

Which of these is an example of repetition?

Accepted Answer

Repeat 10 times: print a star — Repeating an action a fixed number of times is a loop (repetition).

Question 6

Making tea by boiling water, adding a tea bag, then pouring is mainly:

Accepted Answer

Sequence — The steps happen one after another in a fixed order, which is sequence.

Question 7

Which keyword is usually linked with selection?

Accepted Answer

IF — IF (with THEN/ELSE) is used to make a choice in selection.

Question 8

A FOR loop that counts from 1 to 5 is an example of:

Accepted Answer

Repetition — A FOR loop repeats steps a set number of times, so it is repetition.

Question 9

Which three control structures are used to build algorithms?

Accepted Answer

Sequence, selection and repetition — The three basic control structures are sequence, selection and repetition.

Question 10

A program keeps asking for a password until it is correct. This uses:

Accepted Answer

Repetition — Repeating steps until a condition is met is repetition (a loop).