Interview Questions and Answers for 'T' | Search Interview Question

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Q1871. How would you choose your favorite company name for e.g. three companies are given in radio buttons Infosys, TCS and Aricent. Do You need to loop trough all radio buttons and select your favorite company or can just get the selected value.

Javascript

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Q1872. Write code to get count of every 5 letter word in a string using lambda expression

Core Java

Ans. String str = "I had been saying that he had been there";

Map<String,Long> countWords = Arrays.asList(str.split(" ")).stream().filter(p->p.length() = 5).collect(Collectors.groupingBy(p->p,Collectors.counting()));

System.out.println(countWords);

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Q1873. How are hash codes generated ?

Data Structure

Ans. Use hashCode() which returns an integer value, generated by a hashing algorithm

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Q1874. Design a class that find all files with SSN.

Core Java

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Q1875. Describe inheritance and polymorphism and their importance for OOP.

Core Java

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Q1876. Why do we need to close the Scanner ?

Core Java

Ans. For releasing input stream reference (System.in), you should close scanner.

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Q1877. Difference between Arrays and LinkedList ?

Data Structure

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Q1878. How can we make sure that only one object of a class get's created ?

Design

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Q1879. Explain your experience working on UI ? Have you worked with JSF ?

General

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Q1880. Have you faced any problem integrating software / services with any of your partners or vendors ?

General

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Q1881. Can we capture the Request body within the interceptor or Filter and perform operations on it ?

Spring

Ans. Yes, But with interceptor it will remove the body from the request and then we will have to explicitly add the attributes to the session to forward it to the handler.

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Q1882. Which of the following - arrays or LinkedList allow elements to be accessed using index and how ?

Data Structure

Ans. Arrays allows elements to be accessed directly using the index.

As Array elements are stored in continuous memory locations it's very easy to find the memory address of any element using the formula as following

Memory Address of Array start or index 0 + ( Size of array element * Index )

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Q1883. Can we access elements at a particular index using LinkedList collection class ?

Data Structure

Ans. Yes we can. But as the underlying structure of the collection class is double linked list, it will eventually have to traverse to the element linearlly and hence would result in bad performance.

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Q1884. Can you give an example of a Get and Post Request.

Web Service

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Q1885. Can you design a program that can identify if two shapes on x and y plane would intersect ?

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Q1886. Explain CAP Theorem.

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Q1887. Have you heard of Rest method Patch ?

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Q1888. Do you think we should have security Tokens in Url ?

Design

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Q1889. What information should be sent in url vs sent within the body in case of Post request ?

Design

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Q1890. What are the Messaging systems / technologies you have worked with ?

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Q1891. What are the different delivery policies in Apache Kafka ?

Apache Kafka

Ans. Exactly once , At least once , At max once

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Q1892. What is your role in current project ?

General

Ans. Possible Answer - Java Developer

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Q1893. Have you ever encoded the response before sending it back ?

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Q1894. Have you ever encoded the response before sending it back from the service? If Yes , Which encoding was used ?

Ans. In two different situations I used UTF-8 and Base 64 encodings.

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Q1895. Can you explain JSON specification ?

JSON

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Q1896. Have you ever built an automation suite to test a cron job or command line application ?

Testing

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Q1897. Can you explain filter and collectors in java 8 ?

Core Java

Ans. Filters are used to filter object in stream on certail criteria. And collector is used to collect outcome of the stream. Collector is a terminal operation.
List numbers = List.of(1,2,3,4,5,6,7);
List evenNumbers = numbers.stream().filter(n -> n%2==0).collect(Collectors.toList());
The above code will filter out odd numbers and return the list of even number.

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Q1898. Can you explain filter and collectors in java 8 ?

Core Java

Ans. Filters are used to filter object in stream on certain criteria.
Collector is used to collect outcome of the stream. Collector is a terminal operation.
List numbers = List.of(1,2,3,4,5,6,7);
List evenNumbers = numbers.stream().filter(n -> n%2==0).collect(Collectors.toList());
The above code will filter out odd numbers and return the list of even number.

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Q1899. Write a program that identifies numbers in a list that are palindrome and perfect square ?

Core Java

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Q1900. Explain Java collections

Core Java

Ans. Collection is a container which is used to store and manipulate the group of objects

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