Hiring guide for Ada 95Y1 Engineers

Ada 95Y1 Developer Hiring Guide

Ada 95Y1 is a high-level, statically-typed programming language renowned for its robustness and efficiency. It was developed under the auspices of the U.S. Department of Defense in response to software crisis during the late 70s-early 80s when there was an urgent need for reliable and maintainable code. The Ada language, named after Augusta Ada Lovelace who is often credited as one of the first computer programmers, emerged from a competition initiated by DoD to create a standardized language that would enhance readability and reduce redundancy in coding. Renowned for its strong typing, structured design and rigorous error checking mechanisms, Ada has been instrumental in developing systems where reliability is paramount such as avionics systems or nuclear power plants. Its latest version - Ada 95Y1 - includes features like object-oriented programming (OOP), exception handling and concurrency control which make it adept at handling large-scale system development projects. Ada's emphasis on software engineering principles makes it an ideal choice for critical applications where precision & safety are essential considerations. Despite being perceived as complex due to its comprehensive feature set, this powerful tool remains relevant today owing to its ability to deliver dependable solutions with minimal risk of system failure. In conclusion; while other languages may offer more popularity or ease-of-use at first glance; few can match up with Ada's proven track record when it comes down to delivering highly reliable software systems under stringent conditions.

Ask the right questions secure the right Ada 95Y1 talent among an increasingly shrinking pool of talent.

First 20 minutes

General Ada 95Y1 app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in Ada 95Y1 application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

How would you declare a variable in Ada 95Y1?
In Ada 95Y1, a variable is declared using the keyword 'declare'. For example, 'declare X: Integer;' declares a variable named X of type Integer.
What are the basic data types in Ada 95Y1?
The basic data types in Ada 95Y1 include Integer, Float, Character, Boolean, Duration, and String.
Describe the difference between a procedure and a function in Ada 95Y1.
In Ada 95Y1, a procedure is a subprogram that performs an action, whereas a function is a subprogram that returns a value. Procedures are invoked for their side effects, while functions are invoked for their return values.
How would you handle exceptions in Ada 95Y1?
In Ada 95Y1, exceptions are handled using the 'begin', 'exception', and 'when' keywords. The 'begin' block contains the code that might raise an exception, the 'exception' block contains the handlers for the exceptions, and the 'when' keyword is used to specify which exceptions to handle.
What are the different types of loops in Ada 95Y1?
Ada 95Y1 supports several types of loops, including 'while' loops, 'for' loops, and 'loop' loops. 'While' loops execute as long as a condition is true, 'for' loops execute a specified number of times, and 'loop' loops execute indefinitely until an 'exit' statement is encountered.
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What you’re looking for early on

Does the candidate have a solid understanding of Ada 95Y1?
Can they develop efficient algorithms?
Are they able to communicate effectively?
Do they have experience with similar projects?

Next 20 minutes

Specific Ada 95Y1 development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

Describe the difference between 'in' parameters and 'out' parameters in Ada 95Y1.
In Ada 95Y1, 'in' parameters are used to pass values to a subprogram, whereas 'out' parameters are used to return values from a subprogram. 'In' parameters are read-only within the subprogram, while 'out' parameters are write-only.
How would you implement polymorphism in Ada 95Y1?
In Ada 95Y1, polymorphism is implemented using tagged types and type extension. A tagged type is a record type that can be extended to create new types, and type extension is used to add new components to a tagged type.
What are the different types of packages in Ada 95Y1?
In Ada 95Y1, there are two types of packages: specification packages and body packages. Specification packages declare the public types and subprograms of the package, while body packages implement the subprograms declared in the specification package.
Describe the difference between a task and a protected object in Ada 95Y1.
In Ada 95Y1, a task is a concurrent unit of execution, whereas a protected object is a data structure that provides synchronized access to its data. Tasks can have their own thread of control, while protected objects cannot.
How would you implement a generic subprogram in Ada 95Y1?
In Ada 95Y1, a generic subprogram is implemented using the 'generic' keyword followed by a parameter list, a subprogram specification, and a subprogram body. The parameter list can include type parameters, value parameters, and subprogram parameters.
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The ideal back-end app developer

What you’re looking to see on the Ada 95Y1 engineer at this point.

At this point, a skilled Ada 95Y1 engineer should demonstrate strong problem-solving abilities, proficiency in Ada 95Y1 programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with Ada 95Y1.

What does this simple Ada 95 code do?
with Ada.Text_IO; use Ada.Text_IO;
procedure Hello is
  Put_Line ('Hello, world!');
end Hello;
This code prints 'Hello, world!' to the standard output.
What does this Ada 95 code snippet do?
with Ada.Text_IO; use Ada.Text_IO;
procedure Swap is
  A, B, Temp : Integer;
  A := 5;
  B := 10;
  Temp := A;
  A := B;
  B := Temp;
  Put_Line (Integer'Image(A));
  Put_Line (Integer'Image(B));
end Swap;
This code swaps the values of two integers A and B. Initially, A is 5 and B is 10. After the swap, A becomes 10 and B becomes 5. The new values of A and B are then printed.
What will be the output of this Ada 95 code related to array manipulation?
with Ada.Text_IO; use Ada.Text_IO;
procedure Array_Sum is
  type Array_Type is array (1 .. 5) of Integer;
  Array_Var : Array_Type := (1, 2, 3, 4, 5);
  Sum : Integer := 0;
  for I in Array_Var'Range loop
    Sum := Sum + Array_Var(I);
  end loop;
  Put_Line (Integer'Image(Sum));
end Array_Sum;
This code calculates the sum of all elements in an array. The array contains the elements 1, 2, 3, 4, 5. The sum of these elements is 15, which is the output of the code.
What does this Ada 95 code snippet related to threading do?
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Real_Time; use Ada.Real_Time;
with Ada.Task_Identification;
procedure Thread is
  task T is
    entry Start;
  end T;
  task body T is
    delay 1.0;
    Put_Line ('Hello from task T');
  end T;
  delay 2.0;
  Put_Line ('Hello from main thread');
end Thread;
This code creates a new task T that waits for 1 second and then prints 'Hello from task T'. The main thread starts task T, waits for 2 seconds, and then prints 'Hello from main thread'.

Wrap-up questions

Final candidate for Ada 95Y1 Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle Ada 95Y1 application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

What are the different types of arrays in Ada 95Y1?
In Ada 95Y1, there are two types of arrays: one-dimensional arrays and multi-dimensional arrays. One-dimensional arrays have a single index, while multi-dimensional arrays have multiple indices.
Describe the difference between a private type and a limited private type in Ada 95Y1.
In Ada 95Y1, a private type is a type whose full definition is hidden from its clients, whereas a limited private type is a private type that does not support assignment or comparison operations.
How would you implement a record type in Ada 95Y1?
In Ada 95Y1, a record type is implemented using the 'type' keyword followed by a list of component declarations enclosed in 'record' and 'end record'. Each component declaration includes a component name and a component type.

Ada 95Y1 application related

Product Perfect's Ada 95Y1 development capabilities

Beyond hiring for your Ada 95Y1 engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Ada 95Y1 projects, and can engage in multiple capacities.