SC025: Control Structures Lecture Quiz

Which of the following best describes a sequence control structure?

• Executes steps based on conditions.

• Executes steps one after another in a fixed order.

• Repeats steps until a condition is met.

• Jumps to different parts of a program.

Which of the following represents a correct sequence structure?

• Input → Process → Output

• Output → Process → Input

• Condition → Input → Loop

• Process → Condition → Output

Identify the correct steps for a program to calculate the area of a rectangle.

• Input base and height → Calculate area → Print area

• Input width and length → Print result → Calculate area

• Input width and length → Calculate area → Print area

• Input area → Print result → Calculate area

What is the purpose of a selection control structure?

• To execute instructions in order.

• To choose between different actions based on a condition.

• To repeat a task until a condition is false.

• To stop a program.

Which of the following pseudocode represents dual selection?

• if (mark > 50) print "Pass"

• if (mark > 50) print "Pass" else print "Fail"

• if (mark > 80) print "A" else if (mark > 60) print "B"

• while (mark > 0) print "Valid"

In a traffic light analogy, which control structure does it represent?

• Sequence

• Single Selection

• Dual Selection

• Multiple Selection

What is a counter-controlled loop?

• A loop that stops when a sentinel value is entered.

• A loop that executes a fixed number of times.

• A loop that runs without conditions.

• A loop that tests the condition after execution.

Which pseudocode represents a repetition structure to print "Hello" 5 times?

• while (counter <= 5) print "Hello"

• if (counter <= 5) print "Hello"

• read number → print "Hello"

• counter = 1 → repeat until counter == 5 print "Hello"

What is a sentinel-controlled loop?

• A loop that repeats based on a counter.

• A loop that uses a special value to stop execution.

• A loop that tests the condition after running the body.

• A loop that never stops.

In the washing dishes analogy for loops, what represents the loop's stopping condition?

• The dish is washed.

• The water is hot.

• There are no more dirty dishes left.

• The number of dishes to be washed is unknown.