Hiring guide for Ada 95Z3 Engineers

Ada 95Z3 Developer Hiring Guide

Ada 95Z3 is a computer programming language developed in the mid-1990s as an extension of Ada 83, named after Ada Lovelace, widely considered the world’s first programmer. It was designed by the U.S. Department of Defense to supersede over 450 programming languages used for its embedded computer systems. The Z3 extension refers to an efficient SMT solver from Microsoft Research used for formal verification and testing of software applications. This combination provides a high-level, strongly-typed language with built-in support for real-time and concurrent programming. As per sources like "The History of Programming Languages" by Richard L Wexelblat and "Programming Language Pragmatics" by Michael L Scott, Ada 95Z3 continues to be used in critical systems where reliability and efficiency are paramount, such as avionics and defense systems.

Ask the right questions secure the right Ada 95Z3 talent among an increasingly shrinking pool of talent.

First 20 minutes

General Ada 95Z3 app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in Ada 95Z3 application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

What are the key features of Ada 95Z3?
Ada 95Z3 offers strong typing, modularity mechanisms (packages), run-time checking, parallel processing (tasks, synchronous message passing, protected objects, and nondeterministic select statements), exception handling, and generics.
How would you handle exceptions in Ada 95Z3?
In Ada 95Z3, exceptions are handled using the keywords 'begin', 'exception', 'when', 'raise', 'others'. An exception can be raised explicitly using the 'raise' statement and handled using the 'when' clause.
What is the use of 'with' and 'use' clause in Ada 95Z3?
The 'with' clause in Ada 95Z3 is used to import a package while the 'use' clause is used to avoid prefixing the identifiers from the package directly in the calling program.
Describe the difference between a task and a protected object in Ada 95Z3.
Tasks in Ada 95Z3 are used for concurrent programming and are similar to threads. Protected objects, on the other hand, are used to protect shared data from simultaneous access by multiple tasks.
What are 'access types' in Ada 95Z3?
Access types in Ada 95Z3 are similar to pointers in other languages. They provide a way to create dynamic data structures like linked lists, trees etc.
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What you’re looking for early on

Does the candidate have a solid understanding of Ada 95Z3?
Have they worked on any previous projects using Ada 95Z3?
Are they able to effectively problem solve and debug in Ada 95Z3?
Do they keep up to date with the latest updates and features of Ada 95Z3?

Next 20 minutes

Specific Ada 95Z3 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.

How would you implement a generic stack in Ada 95Z3?
In Ada 95Z3, a generic stack can be implemented using a generic package. The package would define a stack type, and operations like push, pop, and is_empty.
What is the use of 'pragma' in Ada 95Z3?
Pragmas in Ada 95Z3 are compiler directives. They provide a way to give additional information to the compiler, like optimization options, warning control etc.
Describe the difference between 'in', 'out', and 'in out' parameters in Ada 95Z3.
'In' parameters in Ada 95Z3 are read-only and cannot be modified, 'out' parameters are write-only and 'in out' parameters can be read and modified.
How would you implement inheritance in Ada 95Z3?
In Ada 95Z3, inheritance is implemented using tagged types and type extension. A new type can be defined as a 'tagged' type and then extended to create a derived type.
What are discriminants in Ada 95Z3?
Discriminants in Ada 95Z3 are special fields that can be used to create variant records, which are similar to unions in C.
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The ideal back-end app developer

What you’re looking to see on the Ada 95Z3 engineer at this point.

At this point, a skilled Ada 95Z3 engineer should demonstrate strong problem-solving abilities, proficiency in Ada 95Z3 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 95Z3.

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 do?
with Ada.Text_IO; use Ada.Text_IO;
procedure Swap is
  A, B, Temp : Integer := 0;
  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 are then printed.
What will be the output of this Ada 95 code?
with Ada.Text_IO; use Ada.Text_IO;
procedure Array_Sum is
  type Int_Array is array (1 .. 5) of Integer;
  Arr : Int_Array := (1, 2, 3, 4, 5);
  Sum : Integer := 0;
  for I in Arr'Range loop
    Sum := Sum + Arr(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 integers 1 through 5, so the output will be '15'.
What does this Ada 95 code do?
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Real_Time; use Ada.Real_Time;
procedure Delay is
  Time : Time_Span := Milliseconds (500);
  delay until Clock + Time;
  Put_Line ('500 milliseconds have passed');
end Delay;
This code introduces a delay of 500 milliseconds using the 'delay until' statement. After the delay, it prints '500 milliseconds have passed'.

Wrap-up questions

Final candidate for Ada 95Z3 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 95Z3 application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

How would you implement a recursive function in Ada 95Z3?
A recursive function in Ada 95Z3 can be implemented in the same way as in other languages, by having the function call itself within its own definition.
Describe the difference between a private type and a limited private type in Ada 95Z3.
A private type in Ada 95Z3 hides the implementation details but allows assignment and comparison. A limited private type also hides the implementation details but does not allow assignment or comparison.
What is the use of 'renames' clause in Ada 95Z3?
The 'renames' clause in Ada 95Z3 is used to create an alias for an existing object, package, subprogram, or type.

Ada 95Z3 application related

Product Perfect's Ada 95Z3 development capabilities

Beyond hiring for your Ada 95Z3 engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Ada 95Z3 projects, and can engage in multiple capacities.