Olete.in – MCQs, Mock Tests & Government Job Prep | Ruby on Rails Ruby MCQ Questions

Ruby is ?

1. procedural language
2. scripting language
3. Markup language
4. Stylesheet language

✅ Correct Answer: 2

Ruby is designed by?

1. Yukihiro Matsumoto
2. Guido van Rossum
3. Tim Berners-Lee
4. Brendan Eich

✅ Correct Answer: 1

Ruby was created in?

1. 1992
2. 1993
3. 1994
4. 1995

✅ Correct Answer: 2

Which of the following statement is not a feature of ruby?

1. Ruby is interpreted programming language.
2. Ruby can be used to write Common Gateway Interface (CGI) scripts.
3. Ruby can be embedded into Hypertext Markup Language (HTML).
4. Ruby can not be connected to Database.

✅ Correct Answer: 4

When Whitespace characters such as spaces and tabs can not ignored in Ruby code?

1. While using strings
2. While using integer
3. while using float value
4. All of the above

✅ Correct Answer: 1

Reserved word can not be used as?

1. constant
2. variable names
3. Both A and B
4. None of the above

✅ Correct Answer: 3

Which character is used to give comment in ruby?

1. !
2. @
3. #
4. $

✅ Correct Answer: 3

Global variables in ruby begin with?

1. @
2. #
3. $
4. &

✅ Correct Answer: 3

Default value of global variable is?

1. -1
2. nil
3. 1
4. infinite

✅ Correct Answer: 2

Local variables in ruby begin with?

1. @ B. C.D.
2. _
3. *
4. #

✅ Correct Answer: 2

Which of the following Ruby Pseudo-Variables is used for The receiver object of the current method?

1. self B. C. D.
2. current
3. nil
4. _FILE_

✅ Correct Answer: 1

Which of the following Ruby Pseudo Variables is used to return current line number in the source file?

1. _FILE_
2. _CURRENT_
3. _LINE_
4. None of the above

✅ Correct Answer: 3

Which notation is used for Octal notation?

1. s
2. xnn
3.
4. n

✅ Correct Answer: 4

Which of the following datatypes are valid in Ruby?

1. Numbers
2. String
3. Boolean
4. All of the above

✅ Correct Answer: 4

What is the sequence of ruby strings?

1. 16-bit bytes
2. 8-bit bytes
3. 4-bit bytes
4. None of the above

✅ Correct Answer: 2

single-quoted strings don`t allow ?

1. substitution
2. backslash notation
3. single-quoted strings allow substitution and backslash notation.
4. single-quoted strings don`t allow substitution and allow backslash notation.

✅ Correct Answer: 4

Objects of which class does the integer from the range -2^60 to 2^(60-1) belong to?

1. Octal
2. Bignum
3. Fixnum
4. Binary

✅ Correct Answer: 2

Instance variables in ruby begin with?

1. @
2. #
3. $
4. &

✅ Correct Answer: 1

Class variables in ruby begin with?

1. @
2. #
3. double @
4. ##

✅ Correct Answer: 3

Default value of class variables is?

1. nil
2. infinite
3. -1
4. error

✅ Correct Answer: 4

Constants in ruby begin with ?

1. Lowercase
2. !
3. !
4. Uppercase

✅ Correct Answer: 4

Which of the following Ruby Pseudo Variables is used to return the name of the current source file?

1. _FILE_
2. _CURRENT_
3. _LINE_
4. None of the above

✅ Correct Answer: 1

Why notation is used in Ruby?

1. Formfeed
2. Escape
3. Carriage return
4. Bell

✅ Correct Answer: 3

Why can not we use quotation marks ("or") with boolean?

1. It indicates that we are talking about a string
2. It indicates that we are assining a value
3. It indicates that that we are replacing boolean data type with string data type
4. None of the above

✅ Correct Answer: 1

What is the output of the given code? my_string=Ruby puts(my_string)

1. Ruby
2. Nil
3. Error
4. my_string

✅ Correct Answer: 3

Which type of number(0b1011 ) is ?

1. Octa
2. Hexadecimal
3. Binary
4. Decimal

✅ Correct Answer: 3

Which of the following is not type of operator in ruby?

1. Arithmetic Operators
2. Comparison Operators
3. Similar operator
4. Parallel Assignment

✅ Correct Answer: 3

eql? Operator is used for?

1. Used to test equality within a when clause of a case statement.
2. if the receiver and argument have both the same type and equal values.
3. if the receiver and argument have the same object id.
4. All of the above

✅ Correct Answer: 2

Which of the following is not a type of Bitwise Operators?

1. <<
2. ^
3. ~
4. None of the above

✅ Correct Answer: 4

In range operator ... is used for ?

1. Creates a range from start point to end point inclusive.
2. Creates a range from start point to end point exclusive.
3. Creates a range from start point inclusive to end point exclusive.
4. Creates a range from start point exclusive to end point inclusive

✅ Correct Answer: 2

Among the following which operator has highest Precedence?

1. ::
2. .
3. []
4. **

✅ Correct Answer: 1

What will be the output of the given code? boolean_var = 15 < 16 && 15 < 15 puts boolean_var

1. TRUE
2. FALSE
3. Type Error
4. Syntax Error

✅ Correct Answer: 2

What will be the output of the given code? num=4>>2 puts num

1. -2
2. 0
3. 2
4. 1

✅ Correct Answer: 4

What will be the output of the given code? boolean_var = 3**2 != 2**3 || true puts boolean_var

1. TRUE
2. FALSE
3. 1
4. 0

✅ Correct Answer: 1

What will be the output of the given code? boolean_var = !(100 / 10 === 10) puts boolean_var

1. TRUE
2. FALSE
3. Type Error
4. Syntax Error

✅ Correct Answer: 2

What will the following expression evaluate to? true || false

1. TRUE
2. FALSE
3. Syntax Error
4. None of the above

✅ Correct Answer: 1

Which operator is used to find exponent in ruby?

1. *
2. **
3. ^
4. %

✅ Correct Answer: 2

equal? Operator is used for?

1. Used to test equality within a when clause of a case statement.
2. if the receiver and argument have both the same type and equal values.
3. if the receiver and argument have the same object id.
4. All of the above

✅ Correct Answer: 3

Guess the operator : If Condition is true ? Then value X : Otherwise value Y?

1. Range Operators
2. Ternary Operator
3. Parallel Operator
4. Arithmetic operator

✅ Correct Answer: 2

Which operator is used to check variable and method are defined or not?

1. define
2. define?
3. defined?
4. defined

✅ Correct Answer: 3

Among the following which operator has lowest Precedence?

1. .
2. ^
3. ...
4. >>

✅ Correct Answer: 3

What will be the output of the given code? num=4<<2 puts num

1. 4
2. 8
3. 16
4. 32

✅ Correct Answer: 3

What will be the output of the given code? num=(10<11)||(11===11)? (11===11.0): 0 puts num

1. TRUE
2. FALSE
3. 1
4. 0

✅ Correct Answer: 2

What will be the output of the given code? boolean_var = false || -20 > -18 puts boolean_var

1. TRUE
2. FALSE
3. Type Error
4. Syntax Error

✅ Correct Answer: 2

What will be the output of the given code? boolean_var = !true || (true || 36 != 6**2) puts boolean_var

1. TRUE
2. FALSE
3. Error
4. None of the above

✅ Correct Answer: 1

What will the following expression evaluate to? !true && !false

1. True
2. False
3. Syntax Error
4. None of These

✅ Correct Answer: 2

Which of the following is not a type of loop in ruby?

1. For Loop
2. Foreach Loop
3. Until Loop
4. While Loop

✅ Correct Answer: 2

What is true about while loop?

1. Executes code while conditional is true
2. In while loop increment is not required
3. Executes code while conditional is false
4. None of the above

✅ Correct Answer: 1

Which statement is used to Jumps to the next iteration of the most internal loop?

1. break
2. next C. D.
3. redo
4. retry

✅ Correct Answer: 2

Which statement is used to restarts the invocation of the iterator call?

1. break
2. next
3. redo
4. retry

✅ Correct Answer: 4

What does end represent?

1. keyword represents the ending of loop
2. keyword represents the start of loop
3. keyword represents the start and ending of loop
4. keyword represents the infinite loop

✅ Correct Answer: 1

What will be the output of the given code? for num in 1...5 puts num end

1. 1 2 3 4
2. 1 2 3 4 5
3. 0 1 2 3 4
4. 0 1 2 3 4 5

✅ Correct Answer: 1

What will be the output of the given code? for num in 1...4 puts num*num end

1. 0 1 4 9.
2. 1 4 9 16
3. 0 1 2 3
4. 1 2 3

✅ Correct Answer: 2

What will be the output of the given code? for i in 1..5 && j in 5..10 puts i+j end

1. 6 8 10 12 14 16
2. Syntax Error
3. 6 8 10 12 14
4. Type Error

✅ Correct Answer: 2

What will be the output of the given code? counter = true while counter !=false puts counter end

1. TRUE
2. FALSE
3. Syntax Error
4. Infinite Loop

✅ Correct Answer: 4

What will be the output of the given code? a=1 b=1 while a&&b puts a+b end

1. 2
2. 2 2 2 2 2
3. Infinite Loop
4. Syntax Error

✅ Correct Answer: 3

What is true about Until loop?

1. Executes code while conditional is true
2. In until loop increment is not required
3. Executes code while conditional is false
4. None of These

✅ Correct Answer: 3

What is the use of break statement?

1. Terminates the most External loop.
2. Terminates all loop
3. Terminates the program
4. Terminates the most internal loop.

✅ Correct Answer: 4

Which statement is used to Restarts this iteration of the most internal loop, without checking loop condition?

1. break
2. next
3. redo
4. retry

✅ Correct Answer: 3

What does the 1..5 indicate?

1. Exclusive range
2. Both inclusive and exclusive range
3. Inclusive range
4. None of the above

✅ Correct Answer: 3

Which of the following is Exit Controlled loop?

1. do..while
2. For
3. Until
4. While

✅ Correct Answer: 1

What will be the output of the given code? for i in 1...3 for j in 1..3 puts j end end

1. 1 2 1 2
2. 0 1 2 0 1 2
3. 1 2 3 1 2 3
4. 1 2 3 1 2

✅ Correct Answer: 3

What will be the output of the given code? i=1 for i in 6..10 puts i**2 end

1. 36 49 64 81
2. 49 64 81 100
3. 49 64 81
4. 36 49 64 81 100

✅ Correct Answer: 4

What will be the output of the given code? counter = 1 while counter < 5 puts counter counter = counter + 1 end

1. Prints the number from 1 to 4
2. Prints the number from 1 to 5
3. Prints the number from 2 to 5
4. Prints the number from 2 to 4

✅ Correct Answer: 1

What will be the output of the given code? while a&&b puts a end

1. TRUE
2. FALSE
3. Syntax Error
4. Name Error

✅ Correct Answer: 4

What will be the output of the given code? i = 4 while i > 0 do print i i -= 1 end

1. 321
2. 3210
3. 4321
4. 43210

✅ Correct Answer: 3