Unit 2 Review

A program needs to allow a customer to input integers until the input number is zero. When the input number is zero, the program should write the message "The number of integers you have input is: X" (instead of X there should be the total count of numbers input). What should be added below to replace the question mark?

• increment var by 1

• An if statement

• Increment count by 1

• Display "Insert another number, please."

Consider the segment of code. If the variable Income begins with a value of 90, and Expenses with a value of 100, what will be displayed by running the program?

• None of these

• You can recover

• Oh man, you better get to work!

• You made a profit

This question uses a robot in a grid of squares. The robot is represented by a triangle which is initially in the bottom left-hand corner and is facing toward the top of the grid.

Based on the following algorithm, what would the robot’s final position be?

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The partial flowchart below represents a section of a program. If the initial values at the start of this section are a = 10, b = 5 and c = 7, which of the following will be outputted when the program runs?

• 7, 10, 5

• 10, 7, 5

• 10, 5, 7

• None of these

The following question uses a robot in a grid of squares. The robot is represented as a triangle which is initially in the bottom left square of the grid and facing right.

Consider the following code segment which moves the robot in the grid.

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What kind of flow pattern is best represented by this portion of a larger flowchart?

• sorting

• selection

• sequence

• iteration

Below is a robot represented by a triangle, in a grid of squares. The robot is in the upper right-hand corner and is facing toward the bottom. Following is the code that is supposed to move the robot through the grid to get to the grey square; however, two of the REPEAT n TIMES and/or IF CONDITION lines have been swapped.

• Line 1

• Line 2

• Line 3

• Line 4

The question below uses a robot in a grid of squares. The following code segment is used to move the robot within the grid. The robot is represented as a triangle, which finishes in the center square of the grid facing towards the bottom of the grid. Which of the following does NOT represent a possible starting position and direction for the robot?

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The question below uses a robot in a grid of squares. The robot is represented as a triangle, which starts in the bottom left square of the grid facing up. The robot can move into any white square (including the numbered squares) but not into a black square. The program below is intended to move the robot from its starting position on the left to the far right of the grid. It uses the procedure Square_Number () which returns the value of the number written on the square if there is one and returns 0 otherwise. What is the result of the running program.

• The robot will never reach the right of the grid.

• The robot will reach the right of the grid and end on square 2.

• The robot will reach the right of the grid and end on square 1.

• The robot will reach the right of the grid and end on square 3.

The following flow chart is intended to display the lyrics of a song when followed correctly. Which of the following statements are reasons why the lyrics of this song cannot be unambiguously determined from the flowchart?

• The selection of which statements should be run where there are choices present is ambiguous.

• Which elements of the code should be repeated and how many times is ambiguous.

• The direction each individual arrow should be followed in is ambiguous.