Xplora Technologies IOS Engineer Interview Questions and Answers

Q1. Can you describe your project experience?
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Q2. What is the SQL query to determine if a given number is even or odd?
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Q3. What is the difference between the SQL commands DELETE, DROP, and TRUNCATE?
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Q4. Some more SQL query questions
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Q1. What is the design of the microservices implemented in your current project?
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Q2. Can you provide a program that prints the second largest number in both an array and a list, illustrating implementations using streams as well as traditional methods?
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Q1. Resume based questions
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Q1. Infrastructure based questions
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Q1. Salary discussion
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Q1. Manager discussion
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C++ ,Java , CAD , CNC programming, Data analytics

Q1. What product management ur doing
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Q2. Where did you undergo your technical traing
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Q3. Where did u place most of your focus when reviewing somebody else code
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Q4. What did you develop
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Q5. What was the project before you are doing
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Q1. Difference between out and ref.
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Q2. Sql query to find the 2nd last student marks
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Q3. Second round was around project specific like why mongodb or posgreSQL? Project architecture and followup questions.
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Q4. Create global exception handler.
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Q1. 1) OOPS in java, and told to explain abstraction, encapsulation, inheritance with practical code 2) Exception handling(globally), Authentication and authorization 3) SOLID principles and factory design pat...read more
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Interview questions for Software Engineer position covering OOPS concepts, exception handling, SOLID principles, Java 8 features, and Streams.
• Abstraction in OOPS: Hiding implementation details. Example: Abstract class Shape with method draw().

• Encapsulation in OOPS: Bundling data and methods that operate on the data. Example: Class Employee with private fields and public getters/setters.

• Inheritance in OOPS: Reusing code...read more
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Q2. 1) Advantage of springboot over spring 2) Tell me all the anotations you know in spring 3) What are CRUD operations, write controller layer and use validating annotations like @NotNull, @valid etc. how to ...read more
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The interview questions cover various topics related to Spring framework, REST vs SOAP, JPA repository, Feign client, circuit breaker, and Spring Security.
• Spring Boot provides a simpler and faster way to set up and run Spring applications compared to traditional Spring.

• Common annotations in Spring include @Controller, @Service, @Repository, @Autowired, @Component, @RequestMapping, @GetMapping, @PostMapping, @PutMapping...read more
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Q3. 1) ACID properties 2) DBMS commands 3) inner queries 4) Joins 5) S3 bucket congif and how to handle file and upload and retrieve in s3 6) Ci/Cd basic flow and docker explaination
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Q1. List down Java 8 features and use case
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Java 8 introduced several new features including lambda expressions, streams, and functional interfaces.
• Lambda expressions: Allow for more concise and readable code by enabling functional programming.

• Streams: Provide a way to work with collections of objects in a more functional style.

• Functional interfaces: Interfaces with a single abstract method, used to enable lambda expressions.

• Optional class: Helps to avoid null p...read more
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Q2. List down Spring boot annotation used
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Spring boot annotations are used to simplify the development process by providing metadata to the Spring framework.
• 1. @SpringBootApplication - Main annotation to indicate the main class of a Spring Boot application.

• 2. @RestController - Annotation for RESTful web services.

• 3. @Autowired - Dependency injection annotation.

• 4. @GetMapping, @PostMapping, @PutMapping, @DeleteMapping - Annotations for mapping HTTP requests to c...read more
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Q3. Difference between String builder and String Buffer
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String Builder is not synchronized and faster, while String Buffer is synchronized and slower.
• String Builder is not thread-safe, while String Buffer is thread-safe.

• String Builder is faster due to lack of synchronization, while String Buffer is slower due to synchronization.

• String Builder is recommended for single-threaded operations, while String Buffer is recommended for multi-threaded operations.
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Q4. What is String pool
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String pool is a storage area in memory where strings are stored to optimize memory usage by reusing common strings.
• String pool helps in reducing memory usage by storing only one copy of each unique string.

• Strings created using double quotes are stored in the string pool.

• Strings created using new keyword are not stored in the string pool.
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Q5. Number of memory type have. like heap memory , stack
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There are two main types of memory in a computer system: stack memory and heap memory.
• Stack memory is used for static memory allocation and is managed by the compiler. It is typically faster but limited in size.

• Heap memory is used for dynamic memory allocation and is managed by the programmer. It is slower but has a larger size.

• Examples: C programming language uses stack memory for function calls and heap memory for dy
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Hydraulic systems and hydraulic machines.

Q1. What is the difference between BS4 and BS6 emissions standards?
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BS6 emissions standards are more stringent than BS4, with lower limits on emissions of pollutants like nitrogen oxides and particulate matter.
• BS6 standards have stricter limits on emissions of pollutants like nitrogen oxides (NOx) and particulate matter (PM) compared to BS4.

• BS6 compliant vehicles are required to have advanced emission control technologies like selective catalytic reduction (SCR) and diesel particulate ...read more
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Q2. What is the difference between an electric motor and an electric generator?
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An electric motor converts electrical energy into mechanical energy to produce motion, while an electric generator converts mechanical energy into electrical energy.
• Electric motor converts electrical energy into mechanical energy

• Electric generator converts mechanical energy into electrical energy

• Electric motor is used in appliances like fans, washing machines

• Electric generator is used in power plants to generate electr
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Q3. Difference between four stroke and two stroke engine
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Four stroke engines have separate intake, compression, power, and exhaust strokes, while two stroke engines combine intake and compression in one stroke and power and exhaust in another.
• Four stroke engines have a dedicated stroke for each of the four processes: intake, compression, power, and exhaust

• Two stroke engines combine intake and compression in one stroke and power and exhaust in another

• Four stroke engines are m...read more
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