Rabbit and Tortoise Technology Solutions Java Developer Trainee Interview Questions and Answers

Questions on string and arrays both are moderate level questions on hacherrank type for 20 marks

Q1. Constructor chaining
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Q2. Hasmap and treemap
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Q1. Write a program for factorial of a number using for loop?
Ans. 
Program to calculate factorial of a number using for loop
• Initialize a variable to store the factorial result

• Use a for loop to iterate from 1 to the given number

• Multiply the current value with the factorial result in each iteration

• Return the factorial result
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Q1. Scenario based questions asked
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There were 5 questions and we need to solve 4 questions in java. Mostly Array and string based.

30 min aptitude quetiobs

2 coding questions where asked i simple logics

Q1. Technical interview
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Q1. What is the difference between HashMap and ConcurrentHashMap?
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Q2. HashMap is not thread-safe, but ConcurrentHashmap is thread-safe and allows concurrent access.
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Q1. Oops Concepts ,Absrtraction,Polymorphism
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Q1. Debugging Techniques, Types of Logs
Ans. 
Debugging techniques involve using logs to identify and fix issues in code.
• Types of logs include console logs, file logs, event logs, and trace logs.

• Debugging techniques include using breakpoints, stepping through code, and analyzing error messages.

• Logging frameworks like log4net and NLog can be used to generate logs for debugging purposes.
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Q2. Aptitude type questions
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Q3. Basic sql queries, sql injection
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Q4. Sessions and cookies
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