L2: Programming Control Structures

What are the three main programming structures?

• Sequence, selection, iteration

• Structured, object-oriented, procedural

• Java, Python, Visual Basic

• Machine, assembly, high-level

Which control structure will execute an instruction only after the computer evaluates conditions to determine if a certain condition exists?

• Selection
• Loop
• Functional
• Sequence

Which type of programming structure requires each instruction to be performed in order, with no possibility of skipping an action or branching off to another action?

• Loop
• Sequence
• Selection
• Iteration

In programming, what is iteration?

• The repetition of steps within a program

• The order in which instructions are carried out

• A decision point in a program

• A terminating statement

Jackson has written a section of code in his program that instructs a character to move forward unless it encounters an obstacle, such as a rock. If the character encounters an obstacle, then it should change direction before moving forward again. If it does not encounter an obstacle, it should continue moving forward. Which type of control structure has Jackson written?

• Selection
• Loop
• Functional
• Sequence

Identify the control structure involved to this question.

A grocery store manager wants a program that allows the clerk to enter original price of an item and discount rate. The program then should display both the original and discounted price.

• Selection

• Sequence

• Iteration

• single-alternative ifs

Identify the control structure involved to this question.

A programmer wants a cup of tea on their break. When they check the kitchen, there are no teabags left, so they make coffee instead

• Selection

• Sequence

• Iteration

• abstraction