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Basic Ruby MCQ

1.
Consider the following statements regarding range operators in Ruby:
Statement X: The two.dot form. "..’. range operator creates a range from start point to end point inclusive.
Statement Y: The three-dot form. "...", range operator creates a range from start point to end point exclusive.

Statement X is correct. while Statement Y is incorrect

Statement X ls Incorrect, while Statement Y Is correct.

Both the statements are correct.

Both the statements are incorrect.

Answer

Correct Answer:

Both the statements are correct.

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2. Which of the following operators indicate continuation of a statement In Ruby?

;

Answer

Correct Answer: +
-
\

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3.
Read the following statements and select the correct option.
Statement 1: A thread shares all global. instance, and local variables that are in existence at the time the thread starts.
Statement 2: Ruby threads are totally out-of~process, and are implemented outside the Ruby interpreter.

Statement 1 is true. while Statement 2 is false.

Statement 1 is false. while Statement 2 is true.

Both the statements are true.

Both the statements are false.

Answer

Correct Answer:

Statement 1 is true. while Statement 2 is false.

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4.
What is the purpose of the following array method in Ruby?
array.rassoc(key)

it searches through the array whose elements are also arrays.

it returns a new array containing the items array for which the block is not true.

it returns the number of non~nil elements in self.

Answer

Correct Answer:

it searches through the array whose elements are also arrays.

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5.
What is the output of the following code. when executed at the Ruby command prompt?
puts "This is sentence 1."
BEGIN {
puts "This is sentence 2."
}

This is sentence 2.

This is sentence 1.

This is sentence 2.

This is sentence 1.This Is sentence 2.

The code will give a syntax error.

Answer

Correct Answer:

This is sentence 2.

This is sentence 1.

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6.
What is the purpose of the following hash method in Ruby?
hash.rehash

it rebuilds hash based on the current values for each key.

it returns hash (self).

it creates a new hash. inverting keys and values from hash. That is, in the new hash. keys from hash become values. and values become keys.

it tests whether hash is empty. returning true or false.

Answer

Correct Answer:

it rebuilds hash based on the current values for each key.

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7.
What is the output of the Ruby code (with line numbers) shown below?
1. (0...5).each do |i|
2. puts "Value of local variable is #{i}"
3. end

Value of local variable is 0

Value of local variable is 1

Value of local variable is 2

Value of local variable is 3

Value of local variable is 4

Value of local variable is 5

Value of local variable is 1

Value oi local variable is 2

Value of local variable is 3

Value of local variable is 4

Value of local variable is 0

Value of local variable is 1

Value of local variable is 2

Value of local variable is 3

Value of local variable is 4

The code gives an error on line number '1

Answer

Correct Answer:

Value of local variable is 0

Value of local variable is 1

Value of local variable is 2

Value of local variable is 3

Value of local variable is 4

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8.
What is the output of the following two lines of codes executed at the Ruby command prompt?
puts 'escape the sentence using "\\"'
puts 'That\'s right, this is a test'

escape the sentence using "\"

That's right, this is a test

escape the sentence using "\\"

That's right, this is a test

escape the sentence using "\"

That\'s right, this is a test

escape the sentence using "\"

Thats right, this is a test

Answer

Correct Answer:

escape the sentence using "\"

That's right, this is a test

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9.
What is the output of the following code, when executed at the Ruby command prompt?
print <<EOF
This is a sample text
EOF
print <<"EOF";
This is a sample text too
EOF

This is a sample text

This is a sample text too

This is a sample text

This is a sample text too

This is a sample textThis is a sample text too

The code gives a syntax error.

Answer

Correct Answer:

This is a sample text

This is a sample text too

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10. Which of the following options represent correct Ruby syntax?

if "gin joint".length >> 9

if "Rick".index("c") >> 2

if -1942.abs >> 1942

if number = Math.abs(number)

Answer

Correct Answer:

if "Rick".index("c") >> 2

if -1942.abs >> 1942

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11.
DBD::Mysql implements some driver-specific functions to be used In Ruby. Given below is one such function:
dbh.func(:insert_id) => Fixnum
What is the purpose of this function?

It returns the protocol being used for the communication.

it returns the current thread ID.

It returns the most recent AUTO_lNCREMENT value for a connection.

It returns the current state of the database.

Answer

Correct Answer:

It returns the most recent AUTO_lNCREMENT value for a connection.

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12.
Consider the following statements regarding environment variables in Ruby:
Statement 1: Environment variable "RUBYLIB" defines the search path for libraries.
Statement 2: Environment variable "RUBYLIB_PREFIX" modifies the "RUBYLIB" search path by replacing the prefix of a particular library.

Statement 1 is correct, while Statement 2 is incorrect.

Statement 2 is correct. while Statement 1 is incorrect.

Both the statements are correct.

Both the statements are incorrect.

Answer

Correct Answer:

Both the statements are correct.

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13.
What is the output of the following code in Ruby?
a = "hello world"
puts a.scan(/(..)(..)/)

[['he'. ‘ll“]. ['0 “. ‘wo']]

hello

world

["hello", "world"]

Answer

Correct Answer:

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14.
Given below is a Ruby code snippet with line numbers:
Note: A file named "test" is located at the location "/var/www/ruby/"
1. aFile = File.new("/var/www/ruby/test", "r")
2. if aFile
3.    aFile.syswrite("RUBY Testing")
4.    print "Done!"
5. else
6.    puts "Unable to open file!"
7. end
What is the outcome when the above code is executed?

it gives an error on line number 2.

No error is generated, and it prints

It gives an error on line number 3.

It gives an error on line number 1.

Answer

Correct Answer:

It gives an error on line number 3.

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15.
What is the purpose of the following hash method in Ruby?

hash.to_a

It creates a two-dimensional array from hash. Each key/'value pair is converted to an array. and all these arrays are stored in a containing array.

It returns a new array containing all the values of hash.

it returns a new array containing the values from hash that are associated with the given key or keys.

it converts hash to an array, and then converts that array to a string.

Answer

Correct Answer:

It creates a two-dimensional array from hash. Each key/'value pair is converted to an array. and all these arrays are stored in a containing array.

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16. Which of the following statements regarding catch and throw blocks are true?

U Catch def‌ines a block that is labeled with the given name.

D The catch block is executed normally even if a throw is encountered.

Ll When Ruby encounters a throw. it zips back the call stack looking for a catch block with a matching symbol.

D it the input does not contain correctly formatted lines. the throw will skip to the end of the corresponding catch.

Answer

Correct Answer: U Catch def‌ines a block that is labeled with the given name.
Ll When Ruby encounters a throw. it zips back the call stack looking for a catch block with a matching symbol.
D it the input does not contain correctly formatted lines. the throw will skip to the end of the corresponding catch.

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17.
In the Ruby programming language, "true" is a type of :

instance variable

Pseudo variable

Class variable

Constant

Answer

Correct Answer: Pseudo variable

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18.
Consider the following Interactive Ruby Shell console quotes. In one of the quotes. ==- Is not the real irb result.
Which of the following is that quote?

irb(main):001:0> "gin joint".length => 9

irb(main):001:0> "hello"[2] => "e"

irb(main):001:0> "Rick".index("c") => 2

irb(main):001:0> "e"*3 => "eee"

None of the above

Answer

Correct Answer:

irb(main):001:0> "hello"[2] => "e"

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19.
What is the output of the following code?
$debug=56
print "Sample Text\n" if $debug

Sample Text

No output

All Error is given

Answer

Correct Answer:

Sample Text

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20. Which of the following statements regarding the Ruby programming language are correct?

Ruby identifiers are case insensitive

Ruby identifier names may consist of alphanumeric characters and the underscore character ( _ ).

'rescue' is a reserved word in RUBY, but it can be used as a method name.

Answer

Correct Answer: Ruby identifier names may consist of alphanumeric characters and the underscore character ( _ ).
'rescue' is a reserved word in RUBY, but it can be used as a method name.

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21.
What is the output of the following code?
$var = 1
print "1 -- Step 1\n" if $var
print "2 -- Step 2\n" unless $var
$var = false
print "3 -- Step 3\n" unless $var

1 -- Step 1

2 - Step 2

3 - Step 3

1 -- Step 1

3 - Step 3

1 -- Step 1

2 - Step 2

1 -- Step 1

nil

Answer

Correct Answer:

1 -- Step 1

3 - Step 3

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22.
Given below are two different cases of class definition, and object instantiation in Ruby.
Case 1:
-----------
class Demo
end
  p = Demo.new
Case 2:
---------
class Demo2
  def initialize(x,y)
    @x, @y = x, y
  end
end
  p = Demo2.initialize(15,20)
What happens when both these cases are executed separately?

Case 1 gives a compilation error indicating that no structure is defined.

Case 2 gives an error for the "initialize" method.

Case 1 gives no error.

Case 2 gives no error.

Answer

Correct Answer:

Case 2 gives an error for the "initialize" method.

Case 1 gives no error.

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23.
In the following statement, what is contained in the argument 'caller'?
raise InterfaceException, "Keyboard failure", caller

stack trace

string 'caller‘

Previous exception

None of the above

Answer

Correct Answer:

stack trace

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24.
Ruby makes it easy to write multi-threaded programs with the Thread class. Ruby threads are a lightweight and efficient way to achieve parallelism in the code. Which of the following calls have the same functionality as “Threadnew‘?

Thread.start

Thread.fork

Thread.current

Thread.join

Answer

Correct Answer:

Thread.start

Thread.fork

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25. Which of the following statements regarding Ruby are correct?

LJ Ruby is a true object-oriented programming language.

D Ruby can be used to write Common Gateway interface (CGI) scripts.

Ll Ruby cannot be embedded into Hypertext Markup Language (HTML).

Ci Ruby can be installed in both Windows and POSIX environments.

Answer

Correct Answer: LJ Ruby is a true object-oriented programming language.
D Ruby can be used to write Common Gateway interface (CGI) scripts.
Ci Ruby can be installed in both Windows and POSIX environments.

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26.
Given below is a Ruby code demonstrating Exception Handling with begin/end block, and rescue clauses.
begin
    puts 'This is before the raise.'
    raise 'Raising an Error'
    puts 'This is after the raise.'
rescue
    puts 'This is being rescued'
end
puts 'This is after the begin block.'

What is the output the above code?

This is being rescued

This is after the begin block.

This is before the raise.

This is after the raise.

This is after the begin block

This is before the raise.

This is being rescued

This is after the begin block.

Answer

Correct Answer:

This is before the raise.

This is being rescued

This is after the begin block.

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27.
What is the output of the following code in Ruby?
puts "Ruby String".unpack('A6')

Ruby

Ruby S

Answer

Correct Answer:

Ruby S

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28.
What is the output of the following code in Ruby?
puts "hello world".sub(/[aeiou]/, '*')

h'll' w‘rld

h*llo world

h’ll' world

hello w*rld

Answer

Correct Answer:

h*llo world

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29.
Which of the following statements regarding ".eql?" and ".equal?" are correct?

.eql? returns true if the receiver and argument have the same object id.

.equal? returns true it the receiver and argument have the same object id.

.eqi? returns true if the receiver and argument have both the same type and equal values.

.equal? returns true it the receiver and argument have both the same type and equal values.

Answer

Correct Answer: .equal? returns true it the receiver and argument have the same object id.
.eqi? returns true if the receiver and argument have both the same type and equal values.

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30.
The following code snippet has two methods, namely "method1" and "method2".
def method1
   x = "This"
   y = "is"
   z = "test"
end
puts method1
def method2
   x = "This"
   y = "is"
   z = "test"
  return x, y, z
end
print method2
What will be the output of the method1 and method2 when called with puts and print?

Output of "puts method1" will be "test"

Output of "print method2" will be "test"

Output of "print method2" will be "Thisistest"

Output of "puts method1" will be nil

Answer

Correct Answer:

Output of "puts method1" will be "test"

Output of "print method2" will be "Thisistest"

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31. What is the difference between “redo" and "retry" statements in Ruby?

"redo" restarts an iteration of the most internal loop, without checking loop condition.

“retry" restarts the invocation of an iterator call. Also. arguments to the iterator are re-evaluated.

"redo" restarts the invocation of an iterator call. Also. arguments to the iterator are re-evaluated.

"retry" restarts an iteration of the most internal loop, without checking loop condition.

Answer

Correct Answer: "redo" restarts an iteration of the most internal loop, without checking loop condition.
“retry" restarts the invocation of an iterator call. Also. arguments to the iterator are re-evaluated.

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32. if there are two variables x and y, such that x=10 and y=5, then:

x + y =15

x -y = 5

x % y = 2

x ** y = 250

Answer

Correct Answer: x + y =15
x -y = 5

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33.
Consider an array "colors" which has the following contents:
colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]
Which of the given options will print the following output?
Red
Blue
Yellow
Green
Violet
Black

colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]
for color in 0...colors.length

print colors[-color -1], "\n"

end

colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]

colors.each {|color| puts color}

colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]

for color in 0..colors.length

print colors[color], "\n"
end

colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]

for color in 0...colors.length

print colors[color], "\n"

end

Answer

Correct Answer:

colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]

colors.each {|color| puts color}

colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]
for color in 0...colors.length

print colors[color], "\n"
end

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34.
Consider the following two commands issued at the Ruby command prompt:
Command 1: $ ruby -c
Command 2: $ ruby -C dir
Which of the following statements regarding these two commands are correct?

Command 1 checks syntax only, without executing the program

Command 1 changes the directory before executing.

Command 2 checks syntax only, without executing the program.

Command 2 changes the directory before executing.

Answer

Correct Answer:

Command 1 checks syntax only, without executing the program

Command 2 changes the directory before executing.

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35. Assuming that f is an instance of the File class:

f.path returns the pathname used to create f.

f.ctime returns the last access time for f.

f.chmod(mode) changes the permission mode of f.

f.mtime returns the last inode change time for f.

Answer

Correct Answer: f.path returns the pathname used to create f.
f.chmod(mode) changes the permission mode of f.

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36. Which of the following is used to cancel the method definition?

def‌ined

undef

self

rescue

Answer

Correct Answer: undef

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37.
Consider the following statements regarding "methods" in Ruby
Statement X: Method names should begin with an uppercase letter.
Statement Y: Methods should be defined before calling them, otherwise Ruby will raise an exception for undefined method invoking.
Select an appropriate option from below:

Statement X is correct, while Statement Y is incorrect.

StatementX is incorrect. while Statement Y is correct

Both the statements are correct.

Both the statements are incorrect.

Answer

Correct Answer:

StatementX is incorrect. while Statement Y is correct

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38.
What is the output if the following code is executed at the Ruby command prompt?

foo = "testing"
puts defined? foo
puts defined? $_

local-variable

Global-variable

testing

global-variable

testing

nil

None of the above

Answer

Correct Answer:

testing

global-variable

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39.
Read the following statements and select the correct option.
Statement 1: When a Ruby program terminates, all running threads are killed. regardless of their states.
Statement 2: You can wait for a particular thread to finish by calling that thread

Statement 1 is true. while Statement 2 is false.

Statement 1 is false. while Statement 2 is true.

Both the statements are true.

Both the statements are false.

Answer

Correct Answer:

Statement 1 is true. while Statement 2 is false.

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40.
What is the output of the following line of code executed at the Ruby command prompt?

puts "The product of 5,10,15 is #{51015}";

750

The product of 5,10,15 is 750

The product of 5,10,15 is #{5*10*15}

It will give typecasting error.

Answer

Correct Answer:

The product of 5,10,15 is 750

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41. In a Ruby installed environment, what happens when "lrb" is typed in the command prompt?

it starts an interactive Ruby Session.

It enables parser debug mode.

It displays an overview of command-line options.

It overwrites the file contents with program output.

Answer

Correct Answer: it starts an interactive Ruby Session.

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42.
What is the output of the following code in Ruby?
x= "Ruby" + "Strings"
puts x
y= "Ruby" << "Strings"
puts y
z = "Ruby".concat("Strings")
puts z

RubyStrings

Strings

RubyStrings

Ruby

nil

RubyStrings

nil

RubyStrings

Answer

Correct Answer:

RubyStrings

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43. Which of the following are correct?

puts sayGoodnight "John-Boy"

puts sayGoodnight("John-Boy")

puts(sayGoodnight "John-Boy")

puts(sayGoodnight("John-Boy"))

All of the above

Answer

Correct Answer: All of the above

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44. Read the following statements and select the correct option.

Statement 1: A thread shares all global, instance, and local variables that are in existence at the time the thread starts.
Statement 2: Ruby threads are totally out-of-process, and are implemented outside the Ruby interpreter.

Statement 1 is true, while Statement 2 is false.

Statement 1 is false, while Statement 2 is true.

Both the statements are true.

Both the statements are false.

Answer

Correct Answer: Statement 1 is true, while Statement 2 is false.

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45. In the Ruby programming language, "true" is a type of :

Instance variable

Pseudo variable

Class variable

Constant

Answer

Correct Answer: Pseudo variable

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46. Read the following statements and select the correct option.

Statement 1: When a Ruby program terminates, all running threads are killed, regardless of their states.
Statement 2: You can wait for a particular thread to finish by calling that thread's Thread#wait method.

Statement 1 is true, while Statement 2 is false.

Statement 1 is false, while Statement 2 is true.

Both the statements are true.

Both the statements are false.

Answer

Correct Answer: Statement 1 is true, while Statement 2 is false.

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47. What is the output of the following code in Ruby?

puts "hello world".sub(/[aeiou]/, '*')

h*ll* w*rld

h*llo world

h*ll* world

hello w*rld

Answer

Correct Answer: h*llo world

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48. Consider the following Interactive Ruby Shell console quotes. In one of the quotes, => is not the real irb result.
Which of the following is that quote?

irb(main):001:0> "gin joint".length => 9

irb(main):001:0> "hello"[2] => "e"

irb(main):001:0> "Rick".index("c") => 2

irb(main):001:0> "e"*3 => "eee"

None of the above

Answer

Correct Answer: irb(main):001:0> "hello"[2] => "e"

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Basic Ruby MCQ

1. Consider the following statements regarding range operators in Ruby:Statement X: The two.dot form. "..’. range operator creates a range from start point to end point inclusive.Statement Y: The three-dot form. "...", range operator creates a range from start point to end point exclusive.

2. Which of the following operators indicate continuation of a statement In Ruby?

3. Read the following statements and select the correct option.Statement 1: A thread shares all global. instance, and local variables that are in existence at the time the thread starts.Statement 2: Ruby threads are totally out-of~process, and are implemented outside the Ruby interpreter.

4. What is the purpose of the following array method in Ruby?array.rassoc(key)

5. What is the output of the following code. when executed at the Ruby command prompt?puts "This is sentence 1."BEGIN { puts "This is sentence 2."}

6. What is the purpose of the following hash method in Ruby?hash.rehash

7. What is the output of the Ruby code (with line numbers) shown below?1. (0...5).each do |i|2. puts "Value of local variable is #{i}"3. end

8. What is the output of the following two lines of codes executed at the Ruby command prompt? puts 'escape the sentence using "\\"' puts 'That\'s right, this is a test'

9. What is the output of the following code, when executed at the Ruby command prompt? print <<EOF This is a sample text EOF print <<"EOF"; This is a sample text too EOF

10. Which of the following options represent correct Ruby syntax?

11. DBD::Mysql implements some driver-specific functions to be used In Ruby. Given below is one such function:dbh.func(:insert_id) => FixnumWhat is the purpose of this function?

12. Consider the following statements regarding environment variables in Ruby: Statement 1: Environment variable "RUBYLIB" defines the search path for libraries. Statement 2: Environment variable "RUBYLIB_PREFIX" modifies the "RUBYLIB" search path by replacing the prefix of a particular library.

13. What is the output of the following code in Ruby?a = "hello world"puts a.scan(/(..)(..)/)

15. What is the purpose of the following hash method in Ruby?hash.to_a

16. Which of the following statements regarding catch and throw blocks are true?

17. In the Ruby programming language, "true" is a type of :

18. Consider the following Interactive Ruby Shell console quotes. In one of the quotes. ==- Is not the real irb result.Which of the following is that quote?

19. What is the output of the following code?$debug=56print "Sample Text\n" if $debug

20. Which of the following statements regarding the Ruby programming language are correct?

21. What is the output of the following code? $var = 1 print "1 -- Step 1\n" if $var print "2 -- Step 2\n" unless $var $var = false print "3 -- Step 3\n" unless $var

23. In the following statement, what is contained in the argument 'caller'? raise InterfaceException, "Keyboard failure", caller

24. Ruby makes it easy to write multi-threaded programs with the Thread class. Ruby threads are a lightweight and efficient way to achieve parallelism in the code. Which of the following calls have the same functionality as “Threadnew‘?

25. Which of the following statements regarding Ruby are correct?

27. What is the output of the following code in Ruby? puts "Ruby String".unpack('A6')

28. What is the output of the following code in Ruby? puts "hello world".sub(/[aeiou]/, '*')

29. Which of the following statements regarding ".eql?" and ".equal?" are correct?

30. The following code snippet has two methods, namely "method1" and "method2". def method1 x = "This" y = "is" z = "test" end puts method1 def method2 x = "This" y = "is" z = "test" return x, y, z end print method2 What will be the output of the method1 and method2 when called with puts and print?

31. What is the difference between “redo" and "retry" statements in Ruby?

32. if there are two variables x and y, such that x=10 and y=5, then:

33. Consider an array "colors" which has the following contents: colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"] Which of the given options will print the following output? Red Blue Yellow Green Violet Black

34. Consider the following two commands issued at the Ruby command prompt: Command 1: $ ruby -c Command 2: $ ruby -C dir Which of the following statements regarding these two commands are correct?

35. Assuming that f is an instance of the File class:

36. Which of the following is used to cancel the method definition?

37. Consider the following statements regarding "methods" in RubyStatement X: Method names should begin with an uppercase letter.Statement Y: Methods should be defined before calling them, otherwise Ruby will raise an exception for undefined method invoking.Select an appropriate option from below:

38. What is the output if the following code is executed at the Ruby command prompt? foo = "testing" puts defined? foo puts defined? $_

39. Read the following statements and select the correct option.Statement 1: When a Ruby program terminates, all running threads are killed. regardless of their states.Statement 2: You can wait for a particular thread to finish by calling that thread

40. What is the output of the following line of code executed at the Ruby command prompt? puts "The product of 5,10,15 is #{5*10*15}";

41. In a Ruby installed environment, what happens when "lrb" is typed in the command prompt?

42. What is the output of the following code in Ruby?x= "Ruby" + "Strings"puts xy= "Ruby" << "Strings"puts yz = "Ruby".concat("Strings")puts z

43. Which of the following are correct?

44. Read the following statements and select the correct option. Statement 1: A thread shares all global, instance, and local variables that are in existence at the time the thread starts. Statement 2: Ruby threads are totally out-of-process, and are implemented outside the Ruby interpreter.

45. In the Ruby programming language, "true" is a type of :

46. Read the following statements and select the correct option. Statement 1: When a Ruby program terminates, all running threads are killed, regardless of their states. Statement 2: You can wait for a particular thread to finish by calling that thread's Thread#wait method.

47. What is the output of the following code in Ruby? puts "hello world".sub(/[aeiou]/, '*')

48. Consider the following Interactive Ruby Shell console quotes. In one of the quotes, => is not the real irb result. Which of the following is that quote?

1.
Consider the following statements regarding range operators in Ruby:
Statement X: The two.dot form. "..’. range operator creates a range from start point to end point inclusive.
Statement Y: The three-dot form. "...", range operator creates a range from start point to end point exclusive.

3.
Read the following statements and select the correct option.
Statement 1: A thread shares all global. instance, and local variables that are in existence at the time the thread starts.
Statement 2: Ruby threads are totally out-of~process, and are implemented outside the Ruby interpreter.

4.
What is the purpose of the following array method in Ruby?
array.rassoc(key)

5.
What is the output of the following code. when executed at the Ruby command prompt?
puts "This is sentence 1."
BEGIN {
puts "This is sentence 2."
}

6.
What is the purpose of the following hash method in Ruby?
hash.rehash

7.
What is the output of the Ruby code (with line numbers) shown below?
1. (0...5).each do |i|
2. puts "Value of local variable is #{i}"
3. end

8.
What is the output of the following two lines of codes executed at the Ruby command prompt?
puts 'escape the sentence using "\\"'
puts 'That\'s right, this is a test'

9.
What is the output of the following code, when executed at the Ruby command prompt?
print <<EOF
This is a sample text
EOF
print <<"EOF";
This is a sample text too
EOF

11.
DBD::Mysql implements some driver-specific functions to be used In Ruby. Given below is one such function:
dbh.func(:insert_id) => Fixnum
What is the purpose of this function?

12.
Consider the following statements regarding environment variables in Ruby:
Statement 1: Environment variable "RUBYLIB" defines the search path for libraries.
Statement 2: Environment variable "RUBYLIB_PREFIX" modifies the "RUBYLIB" search path by replacing the prefix of a particular library.

13.
What is the output of the following code in Ruby?
a = "hello world"
puts a.scan(/(..)(..)/)

15.
What is the purpose of the following hash method in Ruby?

hash.to_a

17.
In the Ruby programming language, "true" is a type of :

18.
Consider the following Interactive Ruby Shell console quotes. In one of the quotes. ==- Is not the real irb result.
Which of the following is that quote?

19.
What is the output of the following code?
$debug=56
print "Sample Text\n" if $debug

21.
What is the output of the following code?
$var = 1
print "1 -- Step 1\n" if $var
print "2 -- Step 2\n" unless $var
$var = false
print "3 -- Step 3\n" unless $var

23.
In the following statement, what is contained in the argument 'caller'?
raise InterfaceException, "Keyboard failure", caller

24.
Ruby makes it easy to write multi-threaded programs with the Thread class. Ruby threads are a lightweight and efficient way to achieve parallelism in the code. Which of the following calls have the same functionality as “Threadnew‘?

27.
What is the output of the following code in Ruby?
puts "Ruby String".unpack('A6')

28.
What is the output of the following code in Ruby?
puts "hello world".sub(/[aeiou]/, '*')

29.
Which of the following statements regarding ".eql?" and ".equal?" are correct?

30.
The following code snippet has two methods, namely "method1" and "method2".
def method1
x = "This"
y = "is"
z = "test"
end
puts method1
def method2
x = "This"
y = "is"
z = "test"
return x, y, z
end
print method2
What will be the output of the method1 and method2 when called with puts and print?

33.
Consider an array "colors" which has the following contents:
colors= ["Red", "Blue", "Yellow", "Green", "Violet", "Black"]
Which of the given options will print the following output?
Red
Blue
Yellow
Green
Violet
Black

34.
Consider the following two commands issued at the Ruby command prompt:
Command 1: $ ruby -c
Command 2: $ ruby -C dir
Which of the following statements regarding these two commands are correct?

38.
What is the output if the following code is executed at the Ruby command prompt?

foo = "testing"
puts defined? foo
puts defined? $_

39.
Read the following statements and select the correct option.
Statement 1: When a Ruby program terminates, all running threads are killed. regardless of their states.
Statement 2: You can wait for a particular thread to finish by calling that thread

40.
What is the output of the following line of code executed at the Ruby command prompt?

puts "The product of 5,10,15 is #{51015}";

42.
What is the output of the following code in Ruby?
x= "Ruby" + "Strings"
puts x
y= "Ruby" << "Strings"
puts y
z = "Ruby".concat("Strings")
puts z

44. Read the following statements and select the correct option.

Statement 1: A thread shares all global, instance, and local variables that are in existence at the time the thread starts.
Statement 2: Ruby threads are totally out-of-process, and are implemented outside the Ruby interpreter.

46. Read the following statements and select the correct option.

Statement 1: When a Ruby program terminates, all running threads are killed, regardless of their states.
Statement 2: You can wait for a particular thread to finish by calling that thread's Thread#wait method.

47. What is the output of the following code in Ruby?

puts "hello world".sub(/[aeiou]/, '*')

48. Consider the following Interactive Ruby Shell console quotes. In one of the quotes, => is not the real irb result.
Which of the following is that quote?