Pseudocode Pretest 24-25

Front

After running the following code segment, what is contained in the array data?

Back

Front

Choose the best description of what the mystery procedure below does. The procedure accepts two parameters: a list of a values and a number n.

PROCEDURE mystery (list, n)
{
i = 1
REPEAT LENGTH(list) TIMES
{
IF ( list[i] = n )
{
DISPLAY (i)
}
i = i+1
}
}

Back

Mystery displays the index of every occurrence of the value n in the list.

Front

A robot starts in a grid facing north (B3). What is the robot's location and direction after the following program is executed?
data = ["F", "F", "R", "F", "L", "F", "R", "R", "F"]
FOR EACH move IN data
{
IF ( move = "F" AND CAN_MOVE(forward) )
{
MOVE_FORWARD()
}
ELSE IF (move = "R"){
rotate_right()
}
ELSE IF ( move = "L") {
rotate_left()
}
}

Back

Front

Which of the following best describes the result of running the procedure below?
PROCEDURE mystery (a, b, c)
{
IF ( a >= b AND a >= c)
{
RETURN (a)
}
ELSE IF ( b >= a AND b >= c)
{
RETURN (b)
}
ELSE
{
RETURN (c)
}
}

Back

It returns the largest of the three input values

Front

The following program processes the list data shown below. What is the output of the following program?
val = 0
i = 1
REPEAT 3 TIMES
{
val = val + data[i]
i = i + 1
}
DISPLAY (val)

Back

17

Front

Cecelia would like to write an app to help manage a trip to the grocery store. The app will maintain a shopping list (a list of words) of all the items to buy. Describe how Cecelia might use a second list in the app. What else might be tracked? Describe how the list would be used and updated in the app.

Back

Cecilia could keep a separate list to track which of the items on her list she has actually found and placed in her shopping cart. So for example if she had a shopping list called list and list of true/false values called got that is initially filled with false to indicate she hasn’t gotten anything yet. Then as she shops if list[i] is “eggs”, and she got eggs, then the app would update got[i]=true.
Other uses:
List of prices
Date of last purchase
List of categories

Front

What is contained in the list after running the following program?
```plaintext
i = 1
val = 0
n = LENGTH(data)
REPEAT n TIMES
{
val = val + data[i]
data[i] = val
i = i + 1
}
```

Back

Front

Assuming that the list data below is given as the parameter to the procedure, what is returned by the following procedure?
PROCEDURE mystery(data)
{
val = 0
FOR EACH item IN data
{
IF (item > val)
{
val = item
}
}
RETURN (val)
}
Options: 3, 4, 9, 10, 16

Back

16

Front

Write procedure (in either JavaScript or pseudocode) called processPath(data) that:
Accepts a list of elevation data as a parameter For every value in the list Compute the absolute difference between that value and the value next to it on the path Add the difference to a running total Compute the absolute difference between that value and the value next to it on the path Add the difference to a running total Return the total elevation traveled

Back

This is a Challenge Problem/Essay Question. Be able to write a code to answer this question.

Front

What are the values of x and y after this script runs? Options: x is equal to 15; y is equal to 15, x is equal to 5; y is equal to 10, x is equal to 15; y is equal to 10, x is equal to "x + 5"; y is equal to "x", x is equal to 10, 15; y is equal to 5, 10

Back

x is equal to 15; y is equal to 10