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About the test:

The Mainframe Online Test uses scenario-based MCQs to evaluate candidates on their knowledge of mainframe technologies, including COBOL programming language, JCL, VSAM, CICS, and DB2. The test aims to evaluate a candidate's ability to design and develop mainframe applications that adhere to industry standards and best practices effectively.

Covered skills:

  • Mainframe Developer
  • Mainframe Analyst
  • Mainframe Programmer
  • Mainframe Specialist
See all covered skills

9 reasons why
9 reasons why

Adaface IBM Mainframe Online Test is the most accurate way to shortlist Mainframe Developers



Reason #1

Tests for on-the-job skills

The Mainframe Online Test helps recruiters and hiring managers to identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates.

The Adaface Mainframe Online test screens candidates for the typical skills recruiters look for Mainframe Developer roles:

  • Strong knowledge of COBOL (CICS), CA7, DB2 and/ or SQL, Other Mainframe Technologies & Tools
  • Experience Developing, troubleshooting, and modifying Mainframe systems
  • Understanding of the complex logic of COBOL and PL/I applications
  • Ability to quickly identify code errors
  • Vast knowledge of business processes in specific industries

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for the Mainframe Developer role. Anti-cheating features enable you to be comfortable with conducting assessments online. The Mainframe Developer test is ideal for helping recruiters identify which candidates have the skills to do well on the job.

Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface ->
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

Ce ne sont qu'un petit échantillon de notre bibliothèque de plus de 10 000 questions. Les questions réelles à ce sujet IBM Mainframe Test ne sera pas googleable.

🧐 Question

Medium

Decision Control
Arithmetic Operations
Decision Structures
Data Types
Solve
Consider the following COBOL program:
 image
What will the program display when it is executed?

Medium

Multi Dimensional Arrays
Arrays
Data Processing
Subroutines
Solve
Consider the following pseudocode snippet in COBOL:
 image
After executing this program, what will be the final state of StrArr?

Medium

VSAM File Processing in COBOL
VSAM
File Handling
Solve
Consider the following COBOL code snippet. The program aims to read from a VSAM Key-Sequenced Data Set (KSDS) named 'CUSTOMER-FILE' which contains customer records. The program reads the file in ascending order by 'CUSTOMER-ID', performs some processing (not shown here), and then displays the 'CUSTOMER-NAME' of the last record read.
 image
Assuming there are no syntax errors and the 'CUSTOMER-FILE' is present and accessible, what will the program display as the last customer's name after executing this COBOL program?
A: The program will display the name of the customer with the highest 'CUSTOMER-ID'.
B: The program will display the name of the customer with the lowest 'CUSTOMER-ID'.
C: The program will not display any customer name.
D: The program will display the name of the first customer in the 'CUSTOMER-FILE'.
E: The program will display an uninitialized or random 'LAST-NAME'.

Medium

Database Performance Tuning and Data Consistency
Database Performance Tuning
Transaction Management
Locking Mechanisms
Solve
Consider the following DB2 database scenario. You are managing a stock trading platform that uses a DB2 database to track user transactions and market prices. The database has two tables, Users and Stocks.
 image
A user transaction to buy a stock is a two-step process:

1. Decrease the user's balance in the Users table.
2. Increase the quantity of the stock owned by the user in the Stocks table.

Both these steps need to be performed atomically to maintain data consistency.

Recently, with the increase in the volume of transactions, you are experiencing performance issues. Additionally, you have observed that during peak trading hours, a large number of user transactions are getting blocked, leading to user dissatisfaction.

Which of the following strategies would BEST address the performance and blocking issues, while ensuring data consistency?
A: Implement an optimistic concurrency control mechanism.
B: Reduce the transaction isolation level to READ UNCOMMITTED.
C: Break the transaction into two separate transactions
D: Increase the database's buffer pool size.
E: Implement row-level locking.

Medium

DB2 Isolation Levels and Data Consistency Revisited
Transactions
Isolation Levels
Data Consistency
Solve
Consider two users executing the following transactions concurrently on DB2:

Transaction 1 (User A):
 image
Transaction 2 (User B):
 image
Table1 has thousands of records, and the value 'Value1' for Column1 is not unique in Table1. Both transactions are executed almost simultaneously with Transaction 2 executed a bit earlier. Considering the isolation levels set for the transactions, which of the following is the potential data inconsistency issue that might arise?
A: A deadlock situation may occur.
B: Transaction 1 will wait indefinitely for Transaction 2 to commit.
C: Both transactions might update the same record leading to a lost update.
D: Transaction 1 can experience a dirty read due to the changes made by Transaction 2.

Medium

Optimizing Query Performance
Indexing
Query Optimization
Solve
You are managing a DB2 database which includes a table named `ORDERS`. The `ORDERS` table has a large volume of data and contains the following columns: `OrderID`, `CustomerID`, `OrderDate`, `ProductID`, `Quantity`. 

One of the frequently executed queries on the `ORDERS` table is:
 image
You are asked to optimize this query without changing its structure or the table schema. Which of the following strategies would MOST likely improve the performance of this query?
A: Create a HASH index on `CustomerID` and `OrderDate`.
B: Create a CLUSTERED index on `CustomerID` and `OrderDate`.
C: Create a NONCLUSTERED index on `CustomerID` and `OrderDate`.
D: Create a CLUSTERED index on `OrderID`.
E: Create a NONCLUSTERED index on `OrderID`.

Medium

Transaction Handling and Error Recovery in DB2
SQL Programming
Transactions
Error Handling
Solve
Consider the following pseudocode in an IBM DB2 environment:
 image
This stored procedure is used to update the inventory of a particular item. If the `NewQuantity` input parameter is negative, the procedure signals an exception. There's also a handler declared for exceptions, which logs an error message.

Given this scenario, if an error occurs during the UPDATE statement, which of the following will happen?
A: The update operation will fail, an error message will be logged, and the quantity in the inventory will remain unchanged.
B: The update operation will succeed, no error message will be logged, and the quantity in the inventory will be updated.
C: The update operation will fail, an error message will be logged, but the quantity in the inventory will still be updated.
D: The update operation will fail, no error message will be logged, and the quantity in the inventory will remain unchanged.
E: The update operation will succeed, an error message will be logged, but the quantity in the inventory will still be updated.

Medium

Disposition Parameters
JCL Syntax
Dataset Management
Solve
Consider the following JCL snippet:
 image
In MYJOB, PROG1 in STEP1 uses the dataset MY.DS.INPUT with a disposition of (OLD,DELETE,KEEP). PROG2 in STEP2 also uses the dataset MY.DS.INPUT with a disposition of (NEW,PASS,DELETE).

Assume that STEP1 executed successfully, but STEP2 failed during its execution. What would be the status of the dataset MY.DS.INPUT after the job MYJOB is run?
A: MY.DS.INPUT will be deleted.
B: MY.DS.INPUT will be kept and can be used by other jobs.
C: MY.DS.INPUT will be newly created.
D: MY.DS.INPUT will be available for the duration of the job, then deleted.
E: MY.DS.INPUT status cannot be determined with the provided information.

Medium

Execution Order and Return Codes
Job Control
Execution Order
Return Codes
Solve
Consider a JCL job that needs to execute five steps: STEP01, STEP02, STEP03, STEP04, and STEP05. The steps represent data initialization, data processing, data validation, error handling, and job finalization respectively.

The execution rules are as follows:

1. The job should always start with STEP01.
2. STEP02 should only execute if STEP01 completes successfully with a return code (RC) of 0.
3. STEP03 should always run after STEP02, irrespective of STEP02's return code.
4. STEP04 should only execute if either STEP02 or STEP03 fails, i.e., return a code not equal to 0.
5. STEP05 should always be the last step, and should only execute if all the previous steps were successful (each returning a code of 0).

Given these rules, how would you design the JCL job using the IF/THEN/ELSE/ENDIF construct?
 image
🧐 Question🔧 Skill

Medium

Decision Control
Arithmetic Operations
Decision Structures
Data Types
2 mins
COBOL
Solve

Medium

Multi Dimensional Arrays
Arrays
Data Processing
Subroutines
2 mins
COBOL
Solve

Medium

VSAM File Processing in COBOL
VSAM
File Handling
2 mins
COBOL
Solve

Medium

Database Performance Tuning and Data Consistency
Database Performance Tuning
Transaction Management
Locking Mechanisms
3 mins
IBM DB2
Solve

Medium

DB2 Isolation Levels and Data Consistency Revisited
Transactions
Isolation Levels
Data Consistency
2 mins
IBM DB2
Solve

Medium

Optimizing Query Performance
Indexing
Query Optimization
2 mins
IBM DB2
Solve

Medium

Transaction Handling and Error Recovery in DB2
SQL Programming
Transactions
Error Handling
3 mins
IBM DB2
Solve

Medium

Disposition Parameters
JCL Syntax
Dataset Management
2 mins
IBM JCL
Solve

Medium

Execution Order and Return Codes
Job Control
Execution Order
Return Codes
2 mins
IBM JCL
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Decision Control
Arithmetic Operations
Decision Structures
Data Types
COBOL
Medium2 mins
Solve
Multi Dimensional Arrays
Arrays
Data Processing
Subroutines
COBOL
Medium2 mins
Solve
VSAM File Processing in COBOL
VSAM
File Handling
COBOL
Medium2 mins
Solve
Database Performance Tuning and Data Consistency
Database Performance Tuning
Transaction Management
Locking Mechanisms
IBM DB2
Medium3 mins
Solve
DB2 Isolation Levels and Data Consistency Revisited
Transactions
Isolation Levels
Data Consistency
IBM DB2
Medium2 mins
Solve
Optimizing Query Performance
Indexing
Query Optimization
IBM DB2
Medium2 mins
Solve
Transaction Handling and Error Recovery in DB2
SQL Programming
Transactions
Error Handling
IBM DB2
Medium3 mins
Solve
Disposition Parameters
JCL Syntax
Dataset Management
IBM JCL
Medium2 mins
Solve
Execution Order and Return Codes
Job Control
Execution Order
Return Codes
IBM JCL
Medium2 mins
Solve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

Avec Adaface, nous avons pu optimiser notre processus de dépistage initial de plus de 75%, libérant un temps précieux pour les gestionnaires d'embauche et notre équipe d'acquisition de talents!


Brandon Lee, Chef des gens, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment IBM Mainframe Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the IBM Mainframe Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


About Mainframe Developer Roles

Mainframes are high-performance computers with large amounts of memory and processors that process billions of simple calculations and transactions in real time.

A mainframe developer is essentially a software developer who works within the mainframe system.

Mainframe experts are a diminishing group of developers. This has created an increasing demand for mainframe experts on a global scale.

Typical Mainframe Developer responsibilities include:

  • Design, develop and maintain Mainframe COBOL & JCL
  • Develop and execute unit test and integration plans/scripts to validate that application changes meet technical specifications
  • Provide Solution Delivery Methodology artifacts associated with application components
  • Perform application support tasks like: systems support, security reviews, & maintenance tasks

What roles can I use the IBM Mainframe Test for?

  • Mainframe Developer
  • Mainframe Programmer

What topics are covered in the IBM Mainframe Online Test?

Mainframe computing
Update cursor
COBOL

Index refers to the number of displacement positions in an array.

Index
Table declaration
Lock contention
SEARCH
Confinement level
Alias
LIKE table
Linkage
Foreign keys
INCLUDE
Referential integrity
CICS
EIB
DRDA
Spool
COPYBOOK
UPDATE
Job Control Language
Static and dynamic linking
DCB parameter
STEPLIB
DB2 program
Type-2 index
SOC-7 error
Evaluate Statements
COMMITS
JCL
Singapore government logo

Les responsables du recrutement ont estimé que grâce aux questions techniques qu'ils posaient lors des entretiens du panel, ils ont pu dire quels candidats avaient de meilleurs scores et se différenciaient de ceux qui ne marquaient pas aussi bien. Ils sont très satisfait avec la qualité des candidats présélectionnés avec le dépistage de l'ADAFACE.


85%
réduction du temps de dépistage

FAQ

Puis-je combiner plusieurs compétences en une seule évaluation personnalisée?

Oui absolument. Les évaluations personnalisées sont configurées en fonction de votre description de poste et comprendront des questions sur toutes les compétences indispensables que vous spécifiez.

Avez-vous en place des fonctionnalités anti-chétion ou de proctorisation?

Nous avons les fonctionnalités anti-modification suivantes en place:

  • Questions non googléables
  • IP Proctoring
  • Proctoring Web
  • Proctoring webcam
  • Détection du plagiat
  • navigateur sécurisé

En savoir plus sur les fonctionnalités de Proctoring.

Comment interpréter les résultats des tests?

La principale chose à garder à l'esprit est qu'une évaluation est un outil d'élimination, pas un outil de sélection. Une évaluation des compétences est optimisée pour vous aider à éliminer les candidats qui ne sont pas techniquement qualifiés pour le rôle, il n'est pas optimisé pour vous aider à trouver le meilleur candidat pour le rôle. Ainsi, la façon idéale d'utiliser une évaluation consiste à décider d'un score de seuil (généralement 55%, nous vous aidons à bencher) et à inviter tous les candidats qui marquent au-dessus du seuil pour les prochains cycles d'entrevue.

Pour quel niveau d'expérience puis-je utiliser ce test?

Chaque évaluation ADAFACE est personnalisée à votre description de poste / Persona de candidats idéaux (nos experts en la matière choisiront les bonnes questions pour votre évaluation de notre bibliothèque de 10000+ questions). Cette évaluation peut être personnalisée pour tout niveau d'expérience.

Chaque candidat reçoit-il les mêmes questions?

Oui, cela vous permet de comparer les candidats. Les options pour les questions du MCQ et l'ordre des questions sont randomisées. Nous avons Anti-Cheating / Proctoring en place. Dans notre plan d'entreprise, nous avons également la possibilité de créer plusieurs versions de la même évaluation avec des questions de niveaux de difficulté similaires.

Je suis candidat. Puis-je essayer un test de pratique?

Non. Malheureusement, nous ne soutenons pas les tests de pratique pour le moment. Cependant, vous pouvez utiliser nos exemples de questions pour la pratique.

Quel est le coût de l'utilisation de ce test?

Vous pouvez consulter nos plans de prix.

Puis-je obtenir un essai gratuit?

Oui, vous pouvez vous inscrire gratuitement et prévisualiser ce test.

Je viens de déménager dans un plan payant. Comment puis-je demander une évaluation personnalisée?

Voici un guide rapide sur Comment demander une évaluation personnalisée sur Adaface.

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