Ruby Programming Training Quiz #1

15 Questions | By Ary.Alva | Updated: Mar 19, 2022 | Attempts: 453

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Test your proficiency in Ruby. . . . Please leave your comments. . . Best of luck!*** Ary Alva ***

Questions and Answers

1.

Ruby array can contain values of which type?
- A.
  
  Integers
- B.
  
  Floats
- C.
  
  Characters
- D.
  
  Any type
- E.
  
  Strings
2.

What is the size of Ruby array
- A.
  
  10
- B.
  
  A Ruby array has no fixed size
- C.
  
  Count
- D.
  
  None of the above
3.

What is the first index of an array
- A.
  
  1
- B.
  
  0
- C.
  
  -1
- D.
  
  None of the above
4.

Let's create an array:a=[1,2,3,4,5]Which statement creates the following output:[1, 2, 3, 4, 5]
- A.
  
  Puts a[0..5]
- B.
  
  A=[0,1,2,3,5] puts a[0..5]
- C.
  
  Print a[1..5]
- D.
  
  For count in a print a[count] end
- E.
  
  None of the above
5.

Let's create an array:a=[12345, 23456, 34567, 98765]Which statement will print an index of the third element of this array.
- A.
  
  A[2]
- B.
  
  Puts a[3]
- C.
  
  For count in a print count if count ==2 end
- D.
  
  For count in a print a[2] end
6.

What is the difference between a hash and an array in Ruby?
- A.
  
  Hash indices can be of any type
- B.
  
  There is no difference
- C.
  
  The size of a hash is not fixed
- D.
  
  The hash size is incremented dynamically
- E.
  
  None of the above
7.

What is the name of key/value pair in Ruby hash?
- A.
  
  Index
- B.
  
  Value
- C.
  
  Entry
- D.
  
  Parameter
- E.
  
  None of the above
8.

Which statement correctly defines hash h?
- A.
  
  H=[fish => Catfish, dog => Terrier, cat => Siamese]
- B.
  
  H={fish => Catfish, dog => Terrier, cat => Siamese}
- C.
  
  H=[fish - Catfish, dog - Terrier, cat - Siamese]
- D.
  
  H=[fish => Catfish dog => Terrier cat => Siamese]
- E.
  
  None of the above
9.

Let's define a hash h. h={"fish" => "Catfish", "dog" => "Terrier", "cat" => "Siamese"} What is the right way to refer to the second element of this hash?
- A.
  
  H[1]
- B.
  
  H[2]
- C.
  
  H[dog]
- D.
  
  H['dog']
- E.
  
  H["dog"]
10.

Let's define a hash h. h={"fish" => "Catfish", "dog" => "Terrier", "cat" => "Siamese"} Which for loop produces an error?
- A.
  
  For animal in h puts animal end puts h['cat']
- B.
  
  For animal, type in h puts "I love " + type + " " +animal +"s" end puts h['cat']
- C.
  
  For count in h puts "I love " + type + " " +animal +"s" end puts h['cat']
- D.
  
  For h in h puts h end
- E.
  
  For h in h puts h end puts h['cat']
11.

What will a standard output of this code snippet be?name = "Alva"print name if name = 'Ary ' ; print "Alva" ;
- A.
  
  AryAlva
- B.
  
  Ary Alva
- C.
  
  Nothing
- D.
  
  Ary Alva
- E.
  
  None of the above
12.

What will a standard output of this code snippet be?def print_parameters(par1, par2, par3) puts par1 puts '#{par2}' puts "#{par3}"end
- A.
  
  Par1 par3
- B.
  
  Par1 #{par2} par3
- C.
  
  Par1 par2 par3
- D.
  
  No output
- E.
  
  None of the above
13.

Please look at this snippet of code:animal_sounds = {"dogs" => "bark", "elefant" => "trumpet", "lion" =>"roar", "cat" => "meow"}def zoo(param) for each_animal, each_sound in param puts each_sound end i_go ="Enough already!"endmy_pet_goes = zoo(animal_sounds)What is the value of my_pet_goes variable in the snippet of code below?
- A.
  
  Enough already!
- B.
  
  Roar
- C.
  
  Bark
- D.
  
  Trumpet
- E.
  
  None of the above
14.

What makes a snippet of code into a block?
- A.
  
  Putting square braces before the first statement and after the last statement of the snippet of code turns it into a block.
- B.
  
  Making a method out of snippet of code turns it into a block.
- C.
  
  Putting the word "do" at the beginning of the first statement and the word "end" after the last statement of the snippet of code turns it into a block.
- D.
  
  Putting curly braces before the first statement and after the last statement of the snippet of code turns it into a block.
- E.
  
  None of the above
15.

What is correct way to pass parameters to a block?
- A.
  
  Block parameters are located at the beginning of the block, enclosed in a pipe symbols (||) and are separated by a colon.
- B.
  
  Block parameters are located at the beginning of the block, enclosed in a pipe symbols (||) and are separated by space.
- C.
  
  Block parameters are located at the beginning of the block, enclosed in square brackets and are separated by semicolon.
- D.
  
  Block parameters are located at the beginning of the block and separated by semicolon.
- E.
  
  None of the above