C++ Control Structures and Conditions Quiz
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Questions and Answers

What type of statement is the if selection statement?

Single-selection statement

How does a switch selection statement differ from an if...else statement?

Switch selection statement is a multiple-selection statement, while if...else is a double-selection statement.

What must a flowchart describing a selection structure begin with?

Decision symbol

What does a pseudocode for a selection structure start with and end with?

<p>'if' and 'endif'</p> Signup and view all the answers

How many courses of action can an if...else statement select between?

<p>Two different actions</p> Signup and view all the answers

What are the five logical conditions supported by C++?

<p>Less than, Less than or equal to, Greater than, Greater than or equal to, Equal to, Not Equal to</p> Signup and view all the answers

What did mathematicians prove in the mid-1960s about constructing programs?

<p>Any program, no matter how complicated, can be constructed using one or more of only three structures.</p> Signup and view all the answers

What is a sequence structure in programming?

<p>A sequence structure is where you perform an action or task, and then you perform the next action, in order.</p> Signup and view all the answers

What is the limitation of a sequence structure?

<p>There is no option to branch off and skip any of the tasks.</p> Signup and view all the answers

What is the second of the three basic structures in programming?

<p>Selection structure or decision structure</p> Signup and view all the answers

What does a selection structure allow in programming?

<p>A selection structure allows branching based on a condition, creating decision paths.</p> Signup and view all the answers

What is a loop structure?

<p>A loop structure allows you to repeat actions while a condition remains true.</p> Signup and view all the answers

What are the actions within a loop known as?

<p>The actions within a loop are known as the loop body.</p> Signup and view all the answers

What is another name for a while loop according to the text?

<p>while...do</p> Signup and view all the answers

How does a loop typically work?

<p>A condition is evaluated, if true, the loop body is executed, and the condition is re-evaluated.</p> Signup and view all the answers

How does pseudocode for a loop start and end?

<p>Pseudocode for a loop starts with 'while' and ends with 'endwhile'.</p> Signup and view all the answers

What does a flowchart describing a loop structure always begin with?

<p>A decision symbol that has a branch returning to a spot prior to the decision.</p> Signup and view all the answers

What does stacking structures mean in the context of programming?

<p>Attaching structures end to end</p> Signup and view all the answers

What are the three basic structures that can be used to solve all logic problems?

<p>sequence, selection, and loop</p> Signup and view all the answers

What are the two end-structure statements shown in the pseudocode in Figure 3-6?

<p>endif and endwhile</p> Signup and view all the answers

Give an example of a daily situation where looping occurs according to the text.

<p>while unread pages remain in the reading assignment read another unread page</p> Signup and view all the answers

What type of structure is used when multiple tasks are followed in a specific order?

<p>sequence</p> Signup and view all the answers

What is the purpose of the else statement in an if...else structure?

<p>To execute when the tested condition is false.</p> Signup and view all the answers

What happens to the instructions after the endif statement?

<p>They are not dependent on the if statement at all.</p> Signup and view all the answers

What does an endwhile statement indicate in a loop structure?

<p>It shows where the loop structure ends.</p> Signup and view all the answers

What is nesting structures in pseudocode?

<p>Placing a structure within another structure.</p> Signup and view all the answers

What does the indentation in pseudocode signify?

<p>That the indented statements must execute together if a certain condition is true.</p> Signup and view all the answers

What do you call a group of statements that execute as a single unit in pseudocode?

<p>A block.</p> Signup and view all the answers

Study Notes

Control Structures

  • A control structure is a basic unit of programming logic, and each structure is one of the following: sequence, selection, or loop.

Sequence Structure

  • A sequence structure performs a series of actions in order, with no option to branch off and skip any tasks.
  • A flowchart that describes a sequence structure never contains a decision symbol, and pseudocode that describes a sequence structure never contains an if or a while.
  • A sequence can contain any number of tasks, but once started, the sequence must be completed step by step until the end.

Selection Structure

  • A selection structure, also known as a decision structure, chooses between two different actions (or groups of actions) based on a condition.
  • A flowchart that describes a selection structure must begin with a decision symbol, and the branches of the decision must join at the bottom of the structure.
  • Pseudocode that describes a selection structure must start with if and end with endif.

Loop Structure

  • A loop structure repeats actions while a condition remains true.
  • The action or actions that occur within the loop are known as the loop body.
  • A flowchart that describes a loop structure always begins with a decision symbol that has a branch that returns to a spot prior to the decision.
  • Pseudocode that describes a loop starts with while and ends with endwhile.

Stacking and Nesting Structures

  • Structures can be combined in an infinite number of ways by stacking or nesting them.
  • Stacking structures involves attaching structures end to end, while nesting structures involves placing a structure within another structure.

Important Concepts

  • Any program, no matter how complicated, can be constructed using only the three basic structures: sequence, selection, and loop.
  • Loops can be thought of as repetition or iteration, and can be used to repeat actions while a condition remains true.

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Description

Test your knowledge on control structures, conditions, and if statements in C++. Learn about logical conditions such as less than, greater than, equal to, and more. Understand the three basic structures used in programming logic.

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