Product Perfect

**DIBOL** is a compiled, structured, business-oriented programming language that was developed by **C. J. Date** in the early 1960s. It was originally used for mainframe computers, but has since been ported to a variety of platforms. DIBOL is known for its efficiency and its ability to handle large amounts of data. **Sources:** * [C. J. Date](https://en.wikipedia.org/wiki/C._J._Date) * [DIBOL](https://en.wikipedia.org/wiki/DIBOL)

Ask the right questions secure the right DIBOL talent among an increasingly shrinking pool of talent.

First 20 minutes

General DIBOL app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in DIBOL 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 DIBOL?

In DIBOL, you declare a variable using the DEFINE statement. For example, 'DEFINE name $8'. This declares a variable 'name' as a string with a maximum length of 8 characters.

What are the basic data types in DIBOL?

DIBOL supports several basic data types including integer, decimal, string, and boolean.

Describe the difference between a global and a local variable in DIBOL.

A global variable in DIBOL is accessible throughout the entire program, while a local variable is only accessible within the subroutine or function where it is declared.

How would you write a conditional statement in DIBOL?

In DIBOL, you can use the IF-THEN-ELSE statement to write a conditional. For example, 'IF age > 18 THEN DISPLAY 'Adult' ELSE DISPLAY 'Minor'.

What are the different types of loops in DIBOL?

DIBOL supports several types of loops including DO-WHILE, DO-UNTIL, and FOR loops.

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What you’re looking for early on

Does the candidate have a solid understanding of DIBOL language?

Has the candidate demonstrated problem-solving skills?

Is the candidate familiar with the tools and technologies commonly used in DIBOL development?

Does the candidate have experience with similar projects or tasks?

Next 20 minutes

Specific DIBOL 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 a DO-WHILE and a DO-UNTIL loop in DIBOL.

A DO-WHILE loop in DIBOL continues as long as the condition is true, while a DO-UNTIL loop continues until the condition becomes true.

How would you handle errors in DIBOL?

In DIBOL, you can handle errors using the ONERROR statement. This allows you to specify a subroutine to be executed when an error occurs.

What are the different types of file operations in DIBOL?

DIBOL supports several file operations including OPEN, CLOSE, READ, WRITE, DELETE, and RENAME.

Describe the difference between the READ and WRITE operations in DIBOL.

The READ operation in DIBOL is used to read data from a file, while the WRITE operation is used to write data to a file.

How would you create a subroutine in DIBOL?

In DIBOL, you can create a subroutine using the SUBROUTINE statement. For example, 'SUBROUTINE add(a, b)'. This creates a subroutine named 'add' that takes two parameters 'a' and 'b'.

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

What does this simple DIBOL code do?
OPEN (1, "EMPLOYEE.DAT", "R")
READ (1, RECORD, EOF=FINISH)
DISPLAY (RECORD)
FINISH: CLOSE (1)
This code opens a file named 'EMPLOYEE.DAT' in read mode, reads the first record from the file, displays the record, and then closes the file.
What will be the output of this DIBOL code?
LET A = 5
LET B = 10
LET C = A + B
DISPLAY (C)
The output of this code will be '15'. It adds the values of variables A and B and assigns the result to variable C, which is then displayed.
What does this DIBOL code do?
DEFINE ARRAY(10)
FOR I = 1 TO 10
LET ARRAY(I) = I * 10
DISPLAY (ARRAY(I))
ENDFOR
This code defines an array of size 10, assigns each element of the array a value that is ten times its index, and then displays each element.
What does this DIBOL code do?
OPEN (1, "EMPLOYEE.DAT", "R")
READ (1, RECORD, EOF=FINISH)
DISPLAY (RECORD)
CLOSE (1)
FINISH: CLOSE(2)
This code opens a file named 'EMPLOYEE.DAT' in read mode, reads the first record from the file, displays the record, and then closes the file. If an EOF (End Of File) condition is encountered during the read operation, it closes file 2.

Wrap-up questions

Final candidate for DIBOL 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 DIBOL 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 DIBOL?

DIBOL supports several types of arrays including one-dimensional, two-dimensional, and multi-dimensional arrays.

Describe the difference between a one-dimensional and a two-dimensional array in DIBOL.

A one-dimensional array in DIBOL has a single row of elements, while a two-dimensional array has multiple rows and columns of elements.

How would you sort an array in DIBOL?

In DIBOL, you can sort an array using the SORT statement. For example, 'SORT array'. This sorts the elements of 'array' in ascending order.

DIBOL application related

Product Perfect's DIBOL development capabilities

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

DIBOL Consultive assessments

DIBOL Application Conversion Assessment DIBOL Application Integration Assessment DIBOL Data & Database Integration Assessment

Custom DIBOL development projects

Custom DIBOL App Conversion DIBOL Custom App Development Process App UI Design for DIBOL Facelifts

Hiring guide for DIBOL Engineers

DIBOL Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

What you’re looking to see on the DIBOL engineer at this point.

DIBOL Consultive assessments

Custom DIBOL development projects