Big Idea 3 (Portion) Quiz

Consider the following code segment.

x ← 25

y ← 50

z ← 75

x ← y

y ← z

z ← x

Which of the variables have the value 50 after executing the code segment?

Responses

• x
• z
• x and z

• y

Consider the following code segment.

red ← blue

blue ← yellow

red ← red

blue ← blue

What are the values of first and second as a result of executing the code segment?

• blue and red

• yellow

• blue and red

• no changes

Assume that both lists and strings are indexed starting with index 1.

The list wordList has the following contents.

["abc", "def", "ghi", "jkl"]

Let myWord be the element at index 3 of wordList. Let myChar be the character at index 2 of myWord. What is the value of myChar?

• i

• h

• f

• e

Consider the following code segment.

firstList ← ["guitar", "drums", "bass"]

secondList ← ["flute", "violin"]

thirdList ← []

thirdList ← firstList

firstList ← secondList

secondList ← thirdList

What are the contents of secondList after the code segment is executed?

• ["flute", "violin", "guitar", "drums", "bass"]

• ["flute", "violin"]

• ["guitar", "drums", "bass"]

• []

Consider the following code segment. (see attached image)

What is displayed as a result of executing the code segment?

• 10 20 30 40

• 21 30 40 50

• 21 40 30 40

• 21 40 30 50

Consider the following code segment.

x = 23

z = x mod y

Which of the following initial values of the variable y would result in the variable z being set to 2 after the code segment is executed?

Responses

• 1

• 2

• 3

• 4

Consider the following procedures for string manipulation.

(see attached image)

Which of the following code segments can be used to store "noon" in the string variable word ?

• word ← "no"

  word ← concat(reverse(word), word)

• word ← "no"

  word ← concat(reverse(word), reverse(word))

• word ← "on"

  word ← concat(reverse(word), word)

• word ← "on"

  word ← concat(reverse(word), reverse(word))

Consider the following procedures for string manipulation. (see attached image)

Assume that the string oldString contains at least 4 characters. A programmer is writing a code segment that is intended to remove the first two characters and the last two characters from oldString and assign the result to newString.

For example, if oldString contains "student", then newString should contain "ude".

Which of the following code segments can be used to assign the intended string to newString ?

Select two answers.

• newString ← substring(oldString, 3, len(oldString) - 4)

• newString ← substring(oldString, 3, len(oldString) - 2)

• tempString ← substring(oldString, 3, len(oldString) - 2)

  newString ← substring(tempString, 1, len(tempString) - 2)

• tempString1 ← substring(oldString, 1, 2)

  tempString2 ← substring(oldString, len(oldString) - 2, 2)

  newString ← concat(tempString1, tempString2)

The following code segment is used to determine whether a customer is eligible for a discount on a movie ticket.

val1 ← (NOT (category = "new")) OR (age ≥ 65)

val2 ← (category = "new") AND (age < 12)

If category is "new" and age is 20, what are the values of val1 and val2 as a result of executing the code segment?

Responses

• val1 = true, val2 = true

• val1 = true, val2 = false

• val1 = false, val2 = true

• val1 = false, val2 = false