Data Resolve Technologies Technical Support Engineer Interview Questions and Answers

Basic aptitude followed with english and reasoning

Q1. Core java technical questions , spring , spring boot
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Q2. What is JIT in java
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JIT stands for Just-In-Time compilation in Java. It dynamically compiles bytecode into machine code at runtime for improved performance.
• JIT is a part of the Java Virtual Machine (JVM) that optimizes the execution of Java programs.

• It analyzes the frequently executed parts of the bytecode and compiles them into native machine code.

• This compilation happens at runtime, just before the code is executed, hence the name Just-...read more
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Q3. Explain lifecyxle of thread in java
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The lifecycle of a thread in Java includes several stages from creation to termination.
• A thread is created using the Thread class or implementing the Runnable interface.

• The thread goes through the new, runnable, and blocked states before running.

• Once running, the thread can be paused, resumed, or stopped.

• Finally, the thread reaches the terminated state and cannot be restarted.
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Simple mcq questions from java, msql, html, css, javascript

Q1. They asked everything mentioned in resume, asked situation based coding questions and the projects.
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Q1. Questions was based on SQL
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Q2. SQL queries and joins and
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Q1. Basic java questions
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Q2. Sql related questions
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Q1. How internally work HashMap ?
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HashMap uses key-value pairs, hashing, and buckets for efficient data retrieval and storage.
• HashMap stores data in key-value pairs, where each key is unique.

• It uses a hash function to compute an index (hash code) for each key.

• The computed index points to a bucket in an array where the value is stored.

• If multiple keys hash to the same index (collision), they are stored in a linked list or tree structure.

• Example: For a k...read more
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Q2. Write the logic of prime number
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A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.
• A prime number has exactly two distinct positive divisors: 1 and itself.

• Examples of prime numbers include 2, 3, 5, 7, 11, and 13.

• The number 1 is not prime because it has only one positive divisor.

• The number 4 is not prime because it can be divided by 1, 2, and 4.

• To check if a number n is prime, test divisi
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Q3. Difference between hash map and hash set?
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HashMap stores key-value pairs; HashSet stores unique keys without values.
• HashMap allows duplicate values but not duplicate keys. Example: {1: 'A', 2: 'B', 1: 'C'} results in {1: 'C', 2: 'B'}.

• HashSet only stores unique elements. Example: {1, 2, 2} results in {1, 2}.

• HashMap provides O(1) average time complexity for get and put operations.

• HashSet provides O(1) average time complexity for add, remove, and contains operati...read more
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. What do you know about company? what type of products company develops?
Ans. Brief: 4 types of products, I recommend to visit the website of the company for updated details.
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Q1. Tell me about yourself?
Ans. Start by telling your name, your hometown, your qualifications, your previous jobs, your job profile in previous companies, why you want to join at a current job profile.
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Q2. Questions about projects, your academics.
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