Wall Street Consulting Services Mainframe Developer Interview Questions and Answers

Q1. What is java and oops concept?
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Q2. What is POM?
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Q1. Tell me about yourself
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Q2. Year of experience
Ans. 
I have over 5 years of experience in Java development, focusing on building scalable applications and optimizing performance.
• Developed multiple web applications using Spring Boot and Hibernate.

• Implemented RESTful APIs for seamless integration with front-end applications.

• Worked on performance tuning and optimization of existing Java applications.

• Collaborated with cross-functional teams to deliver projects on time.
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Aptitude it is a type of test in which there are many questions like resigning, technical,blood relation.etc

In group discussion we have provided some topic and told discuss about that topic and tell advantages and dis advance.

Q1. What is final in java
Ans. It is a type of keyword when be declared this keyword in any variable then we can't use this variable into another class.
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Q2. What is static In java?
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Q3. The static it is a type of method called static method in which when we declared a method as static then it can't be inherited another class
Ans. 
Static methods belong to the class, not instances, and cannot be inherited by subclasses.
• Static methods are declared using the 'static' keyword.

• They can be called without creating an instance of the class.

• Example: 'ClassName.methodName()' can be used to call a static method.

• Static methods cannot access instance variables or instance methods directly.

• Example: If 'methodA' is static, it cannot call 'methodB' (non-static)...read more
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Basic knowledge required for the Aptitude Test. You need to understand the questions and their technicality and then each question is very easy.

Need to focus more on the SQL Queries and some average coding skills. This test is used to check the code understanding of the candidate.

Little more complex problems, need to understand the logic and some complex SQL Queries.
More Focus on JOINS in SQL.

First there will be a topic given to you to write an article of length 300-400 words in 15 mins. This article writing is to check your knowledge of English language.
Then there is a 45 mins round test in which 40 questions will be asked.
20 Technical and 20 Programming.
The programming questions will be from C++, and you are required to choose the correct output of the given C++ program.
The technical aptitude questions were medium to hard.

Q1. It's a 1:30 hr round. In this part, there will be 4 coding questions from arrays topic which you can solve with any programming language you know. Along with this, you will have 2 questions from SQL and e...read more
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40 Minutes. 40 Question in office Test.
20 Questions Programming related and 20 Questions Aptitude