Practice: Variables

Q1.1

What is the type of variable s?

s:bool
s = true
print s

Choose one correct answer:

• A: true
• B: bool
• C: false
• D: program errors
• E: none of the above

Solution

B

Q1.2

What is the type of variable s?

s:string
s = true
print s

Choose one correct answer:

• A: true
• B: string
• C: bool
• D: program errors
• E: none of the above

Solution

D

Q1.3

What is the type of variable s?

s:string
s = "true"
print s

Choose one correct answer:

• A: true
• B: string
• C: bool
• D: program errors
• E: none of the above

Solution

B

Q1.4

What is the type of variable s?

s:num
s = 3
print s

Choose one correct answer:

• A: number
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

E

Q1.5

What is the type of variable s?

s = 3
s:num
print s

Choose one correct answer:

• A: number
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

D

Q2.1

What is the type of variable s?

s = 3
print s

Choose one correct answer:

• A: num
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

D

Q2.2

What is the type of variable s?

s := 3
print s

Choose one correct answer:

• A: num
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

A

Q2.3

What is the type of variable s?

s = "3"
print s

Choose one correct answer:

• A: num
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

D

Q2.4

What is the type of variable s?

s := "3"
print s

Choose one correct answer:

• A: num
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

C

Q2.5

What is the type of variable s?

s = true
print s

Choose one correct answer:

• A: bool
• B: 3
• C: string
• D: program errors
• E: none of the above

Solution

D

Q2.6

What is the type of variable s?

s := true
print s

Choose one correct answer:

• A: bool
• B: true
• C: string
• D: program errors
• E: none of the above

Solution

A

Q3.1

What is the type of variable s?

s:string
s := "abc"
print s

Choose one correct answer:

• A: bool
• B: "abc"
• C: string
• D: program errors
• E: none of the above

Solution

D

Q3.2

What is the type of variable s?

s:string
s = "abc"
print s

Choose one correct answer:

• A: bool
• B: "abc"
• C: string
• D: program errors
• E: none of the above

Solution

C

Q3.3

What is the type of variable s?

s := "abc"
s = "123"
print s

Choose one correct answer:

• A: bool
• B: "abc"
• C: string
• D: program errors
• E: none of the above

Solution

C

Q3.4

What is the type of variable s?

s := "abc"
s := "123"
print s

Choose one correct answer:

• A: bool
• B: "abc"
• C: string
• D: program errors
• E: none of the above

Solution

D

Q3.5

What is the type of variable s?

s = "abc"
s := "123"
print s

Choose one correct answer:

• A: bool
• B: "abc"
• C: string
• D: program errors
• E: none of the above

Solution

D

Q4.1

What does this program output?

s := "false"
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  false false
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q4.2

What does this program output?

s := true
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  true true
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q4.3

What does this program output?

s:bool
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  false false
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q4.4

What does this program output?

s:bool
s = true
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  true true
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q4.5

What does this program output?

s := true
s = true
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  true true
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q4.6

What does this program output?

s:num
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  0 0
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q4.7

What does this program output?

s := 2
print s s

Choose one correct answer:

• A:

  s s
  

• B:

  2 2
  

• C:

  "s s"
  

• D: program errors

• E: none of the above

Solution

B

Q5.1

Which drawing does this program create?

c2 := "red"
c1 := "blue"
w1 := 2
w2 := 5

color c1
width w1
move 20 80
line 80 80

color c2
move 20 60
line 80 60

width w2
move 20 40
line 80 40

color c1
move 20 20
line 80 20

Choose one correct answer:

• A:
  
• B:
  
• C:
  
• D:
  
• E:
  

Solution

A

Q5.2

Which drawing does this program create?

c2 := "red"
c1 := "blue"
w1 := 2
w2 := 5

color c1
width w1
move 20 80
line 80 80

width w2
move 20 60
line 80 60

color c2
move 20 40
line 80 40

width w1
move 20 20
line 80 20

Choose one correct answer:

• A:
  
• B:
  
• C:
  
• D:
  
• E:
  

Solution

B

Q5.3

Which drawing does this program create?

c1 := "red"
c2 := "blue"
w1 := 2
w2 := 5

color c1
width w1
move 20 80
line 80 80

width w2
move 20 60
line 80 60

color c2
move 20 40
line 80 40

width w1
move 20 20
line 80 20

Choose one correct answer:

• A:
  
• B:
  
• C:
  
• D:
  
• E:
  

Solution

C

Q5.4

Which drawing does this program create?

c1 := "red"
c2 := "blue"
w1 := 2
w2 := 5

color c1
width w1
move 20 80
line 80 80

width w2
move 20 60
line 80 60

color c2
move 20 20
line 80 20

width w1
move 20 40
line 80 40

Choose one correct answer:

• A:
  
• B:
  
• C:
  
• D:
  
• E:
  

Solution

D

Q5.5

Which drawing does this program create?

c1 := "red"
c2 := "blue"
w1 := 2
w2 := 5

color c1
width w1
move 20 60
line 80 60

width w2
move 20 80
line 80 80

color c2
move 20 20
line 80 20

width w1
move 20 40
line 80 40

Choose one correct answer:

• A:
  
• B:
  
• C:
  
• D:
  
• E:
  

Solution

E

Q6.1

Which program creates the following output?

true false

Choose three correct answers:

• A:

  x1 := true
  x2 := false
  print x1 x2
  

• B:

  b:bool
  print "true" b
  

• C:

  x1:string
  x1 = "true"
  x2 := "false"
  print x1 x2
  

• D:

  x1:string
  x1 := "true"
  x2 := false
  print x1 x2
  

Solution

A,B,C

Q6.2

Which program creates the following output?

1 0

Choose three correct answers:

• A:

  x1:num
  x2 := 1
  print x1 x2
  

• B:

  x2:num
  x1 := 1
  print x1 x2
  

• C:

  x1 := "1"
  x2 := 0
  print x1 x2
  

• D:

  x1 := "1"
  x2:num
  print x1 x2
  

Solution

B,C,D

Q6.3

Which program creates the following output?

0 false

Choose three correct answers:

• A:

  x1:num
  x2 := false
  print x1 x2
  

• B:

  x1:num
  x2:bool
  print x1 x2
  

• C:

  x1:num
  x2 := " false "
  print x1 x2
  

• D:

  x1:num
  x2 := "false"
  print x1 x2
  

Solution

A,B,D

Q6.4

Which program creates the following output?

0 true

Choose three correct answers:

• A:

  x1:num
  x2 := true
  print x1 x2
  

• B:

  x1:num
  x2:bool
  print x1 x2
  

• C:

  x1:num
  x2 := "true"
  print x1 x2
  

• D:

  x1 := "0"
  x2 := "true"
  print x1 x2
  

Solution

A,C,D

Q7.1

Which program creates this drawing ?

Choose two correct answers:

• A:

  w := 30
  w2 := 10
  rect w w
  rect w w
  rect w2 w2    
  

• B:

  w := 30
  w2 := 10
  rect w w
  rect w2 w2
  rect w w    
  

• C:

  w := 10
  move 30 30
  rect w w
  w = 30
  rect w w
  move 0 0
  rect w w
  

• D:

  w := 10
  w2 = 30
  rect w2 w2
  rect w w
  rect w2 w2
  

Solution

B,C

Q7.2

Which program creates this drawing ?

Choose two correct answers:

• A:

  w1 := 20
  w2 := 40
  rect w1 w1
  rect w2 w2
  rect w1 w1
  

• B:

  w := 20
  rect w w
  w = 40
  rect w w
  w = 20
  rect w w
  

• C:

  w1 := 40
  w2 := 20
  rect w1 w1
  rect w2 w2
  rect w1 w1
  

• D:

  w := 20
  rect w w
  w = 40
  rect w w
  w := 20
  rect w w
  

Solution

A,B

Q7.3

Which program creates this drawing ?

Choose two correct answers:

• A:

  c := "red"
  c2 := "black"
  width 2
  color c2
  line 30 60
  color c
  line 60 20
  line 90 90
  

• B:

  c := "red"
  c2 := "black"
  width 2
  color c2
  line 30 60
  color c
  line 60 20
  color c2
  line 90 90
  

• C:

  c := "red"
  c2 := "black"
  width 2
  color c2
  line 30 60
  move 90 90
  line 60 20
  color c
  line 30 60
  

• D:

  c := "red"
  c2 := "black"
  width 2
  color c2
  line 30 60
  move 90 90
  line 60 20
  color c
  line 30 50
  

Solution

B,C

Q7.4

Which program creates this drawing ?

Choose two correct answers:

• A:

  c := "red"
  c2 := "black"
  p2 := 70
  move 70 50
  color c
  circle 30
  move p2 50
  color c2
  circle 30
  

• B:

  c := "red"
  c2 := "black"
  move 70 50
  color c
  circle 30
  move 30 50
  color c2
  circle 30
  

• C:

  x := 70
  r := 30
  move x 50
  color "red"
  circle r
  move r 50
  color "black"
  circle r
  

• D:

  x := 70
  r := 30
  move x 50
  color "red"
  circle r
  move x 50
  color "black"
  circle r
  

Solution

B,C

Q8.1

Add the missing line of code to create the output below:

a := "abc"
b:num
// --- missing line of code goes here ---
print a b

Output

abc 2.4

Missing line of code

Solution

b = 2.4

Q8.2

Add the missing line of code to create the output below:

b := 2.4
// --- missing line of code goes here ---
print a b

Output

abc 2.4

Missing line of code

Solution

a := "abc"

Q8.3

Add the missing line of code to create the output below:

a:string
a = "abc"
// --- missing line of code goes here ---
print a b

Output

abc 2.4

Missing line of code

Solution

b := 2.4

Q8.4

Add the missing line of code to create the output below:

a:string
b := 2.4
// --- missing line of code goes here ---
print a b

Output

abc 2.4

Missing line of code

Solution

a = "abc"