Interview Questions and Answers for 'L' | Search Interview Question

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Q1891. What are the 22 possible values of x where x== -x (true) ?

Ans. byte x = 0;
short x = 0;
char x = 0;
int x = 0;
int x = Integer.MIN_VALUE;
float x = 0.0f;
float x = -0.0f;
long x = 0;
long x = Long.MIN_VALUE;
double x = 0.0;
double x = -0.0;
Byte x = 0;
Short x = 0;
Character x = 0;
Integer x = 0;
Integer x = Integer.MIN_VALUE;
Float x = 0.0f;
Float x = -0.0f;
Long x = 0L;
Long x = Long.MIN_VALUE;
Double x = 0.0;
Double x = -0.0;

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Q1892. Details of networking apis supported by java.

Ans. retrofit 2, volly and OkHttp

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Q1893. Combine and join integer and string list to single list and sort.

Core Java

Ans. Object[] combined = new Object[first.length second.length];
System.arraycopy(first, 0, combined, 0, first.length);
System.arraycopy(second, 0, combined, first.length, second.length);

-- OR --

Object[] combined = Stream.concat(Arrays.stream(first), Arrays.stream(second)).toArray();

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Q1894. Difference between interface and inheritance

Core Java

^{This question was recently asked at 'HCL Technologies'.This question is still unanswered. Can you please provide an answer.}

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Q1895. Write program to recursively iterate through map ?

Core Java

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Q1896. Give specific situation about when to go for constructor based injection and setter based injection in spring.

Spring

^{This question was recently asked at 'Tata Consultancy (TCS)'.This question is still unanswered. Can you please provide an answer.}

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Q1897. Can you tell us a use case of reflection in java that you have applied ?

Design

^{This question was recently asked at 'CenturyLink'.This question is still unanswered. Can you please provide an answer.}

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Q1898. Write SQL query to join 2 tables ?

SQL

Ans. Select * from table1 join Select * from table2

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Q1899. Difference between Query param and path param ?

^{This question was recently asked at 'GSpann Technologies, Motorola Solutions'.This question is still unanswered. Can you please provide an answer.}

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Q1900. Can you give me a use case where you utilized serialization in your project code?

Core Java

Ans. we use serialization when we send response to client in JSON format.(the process of converting model object into json is nothing but serialization

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Q1901. What is runtime Polymorphism ?

Design

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Q1902. Linked List related questions.

Data Structure

^{This question was recently asked at 'Compro Technologies'.This question is still unanswered. Can you please provide an answer.}

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Q1903. SQL Questions.

Database

^{This question was recently asked at 'Eurofins IT Solutions'.This question is still unanswered. Can you please provide an answer.}

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Q1904. Explain your project details.

General

^{This question was recently asked at 'snipe tech'.This question is still unanswered. Can you please provide an answer.}

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Q1905. Difference between injection and auto wiring.

Spring

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Q1906. Which interface is used for hashset implementation ?

Core Java

Ans. HashSet implements Set interface.

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Q1907. JWT internal working

^{This question was recently asked at 'HCL Technologies'.This question is still unanswered. Can you please provide an answer.}

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Q1908. Which source code management do you use and what do you dislike the most about it ?

Tools

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Q1909. What are the best strategies to improve code readability ?

General

Ans. https://dzone.com/articles/10-tips-how-to-improve-the-readability-of-your-sof

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Q1910. Give an example of a time when you recommended code changes in a code review that simplified the code ?

Code Review

Ans. If there is a situation to remove duplicates values from an arrayList. Developer implemented using legacy for-loop where I suggested to use Linked hash set to remove duplicates from the list.

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Q1911. Give an example wherein you recommended some solution that fixed the problem in a much easier way ?

General

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Q1912. Have you ever walked out of an interview ? Why ?

General

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Q1913. What are the technologies you would like to work on ?

General

Ans. Java 7 , SQL Server

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Q1914. Why in Java does it require "static" in the main function?

Core Java

Ans. Because there needs to be a starting point till when there is no object created in memory and hence it needs to be run in static scope

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Q1915. What happens when exceptions are not handled ?

Ans. Program / Thread Termination

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Q1916. What are the mutable and immutable data types ?

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Q1917. Difference between class and object with example.

Core Java

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Q1918. What if we use all access specifiers ? Is it encapsulation ?

Core Java

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Q1919. What is stress testing ?

Testing

Ans. Stress testing is a software testing activity that determines the robustness of software by testing beyond the limits of normal operation.

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Q1920. Difference between constructor and method ?

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