EIFFEL

Question 1

Who developed Eiffel?

Answer 1

Dr. Bertrand Meyer

Question 2

What is Eiffel’s programming language paradigm?

Answer 2

Object-Oriented Programming

Question 3

This term is used to refer to attributes, methods/routines or components of a class?

Answer 3

Features

Question 4

A collection of classes or source code files in the same directory?

Answer 4

Cluster

Question 5

The keyword used to implement a multi-way selection statement (like switch)?

Answer 5

Inspect

Question 6

Eiffel wasn’t designed simply to be a coding tool but more like a comprehensive environment for applying the principles of Simple Concurrent Object-Oriented Programming (SCOOP).

True or False

Answer 6

FALSE

Question 7

The modern EiffelStudio IDE is predominantly used on Windows (x86/x64) architecture. It uses “Melting Ice” technology to allow rapid compilation on personal computers.

True or False

Answer 7

TRUE

Question 8

Eiffel does not have return statements and uses a Result variable instead to store the return value.

True or False

Answer 8

TRUE

Question 9

In order to separate routine parameters, you use a semicolon (;)

True or False

Answer 9

TRUE

Question 10

Eiffel uses a rescue and redefine mechanism rather than try-catch. This is designed to restore the object’s invariant (valid state) rather than just suppressing the error.

True or False

Answer 10

FALSE

Question 11

What is the final output?

feature
       calculate_sum (a, b: INTEGER): INTEGER
       do
              Result := a + b
              Result := Result + 5
       end
end
-- Call:
print(calculate_sum(5, 5))

Eiffel

Answer 11

**15 **
(5 + 5 = 10, then 10 + 5 = 15. The Result variable holds the accumulating value).

Question 12

What is the text displayed on the screen?

feature
       make_sentence
               local
                     word: STRING
       do
              word := "Eiffel"
              word.append(" Tower")
              print(word)
       end
end 

Eiffel

Answer 12

Eiffel Tower (The append feature modifies the string in place)

Question 13

What is the output?

feature
       check_value
       local
              x: INTEGER
       do
              x := 10
              if x > 20 then
                     print("Greater")
              else
                     print("Lesser")
              end
       end
end

Eiffel

Answer 13

Lesser
(10 is not greater than 20).

Question 14

What letter is printed?

feature
       evaluate_grade (grade: INTEGER)
              do
                     inspect grade
                     when 90..100 then
                            print("A")
                     when 80..89 then
                            print("B")
                     else
            end
end
-- Call:
evaluate_grade(85) 

Eiffel

Answer 14

B
(The value 85 falls inside the range 80..89)

Question 15

What is the output?
~~~
feature
tricky_loop
local
i: INTEGER
do
from
i := 10
until
i > 5 – Termination condition
loop
print(i)
i := i - 1
end
print(“Done”)
end
end
~~~

Eiffel

Answer 15

Done
In Eiffel, until defines the termination condition (stop when true), not a “while” condition. Since i starts at 10, and 10 > 5 is True immediately, the loop body never executes. It skips straight to printing “Done