Interview Question and Answers | Search Coding Interview Questions

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Q901. Have you heard of volatile Table in Teradata ?

Ans. If you create table with VOLATILE option, the life of the table will be only for the current session.
It will be automatically dropped by Teradata manager once session expires.

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Q902. What is your daily work schedule ?

General

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Q903. What is the difference between log4j and java logging api.

Log4j

Ans. log4j is by apache while java logging api is given by sun. log4j is more powerful,extensible and simple to use than java logging api.

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Q904. Do you know how can we export Redis data ?

Redis

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Q905. Have you worked with Data Feeds ?

General

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Q906. Have you ever worked on migrating AWS services and databases from one account to another ?

Amazon Web Services (AWS)

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Q907. Which memory segment holds the byte code ?

Core Java

Ans. Code Segment

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Q908. What is meant by "unreachable code" ? Can you write a code segment explaining this ?

Core Java

Ans. Unreachable code is a code segment that can never be executed in any case. For example -

int x = 5;
return;
System.out.println(x);

In this code , 2nd line will return the control out of the method and hence 3rd line will never get executed and hence is unreachable code. This will be caught at compile time only.

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Q909. Can we call a static method using reference currently pointing to null.

Core Java

Ans. yes, we can.
exa: public class Java{
public static void main(String... args) {
JAva j= null;
j.greeting(); // call with null reference
}
public static void greeting() {
System.out.println("Hello World");
}
} // output: Hello World

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Q910. How to run jar file using command prompt

Core Java

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Q911. Diff between Runtime.getRunTime().gc() and System.gc()

Core Java

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Q912. Which jar files need to be included for using Hibernate ?

Hibernate

Ans. hibernate-orm
hibernate-validator
hibernate-ogm
hibernate-search

or you can download hibernate core with all dependencies.

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Q913. What is the use of sql dialect ?

Hibernate

Ans. Dialect means "the variant of a language".

Similarly in case of SQL Dialect we specify what dialect of SQL to be generated keeping in mind of underlying database.

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Q914. Tell something about Sleep method.

Core Java

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Q915. Which Java version supports Interface Default methods ?

Core Java

Ans. Java 1.8 or Java 8

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Q916. How can multi threading lead to a deadlock ?

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Q917. Are Arrays a data structure or a collection class ?

Core Java

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Q918. Why Arrays are considered as data structures whereas ArrayList isn't ?

Core Java

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Q919. Difference between static and dynamic memory allocation ?

Core Java

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Q920. How is it possible to use concat on string objects in Java, based on the fact that string is immutable?

Core Java

Ans. It's possible because internally java first reserves the memory for the new concatenated string and then copy that over. So after concatenation, there are 2 strings in memory, the original one and the concatenated one and then the reference is moved to the concatenated string.

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Q921. How do you implement 'state and behavior' of object in Java program?

Core Java

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Q922. Write a program to insert a value after a specific value in an array.

Data Structure

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Q923. Can we make array volatile in Java ?

Core Java

Ans. Yes, you can make an array (both primitive and reference type array e.g. an int array and String array) volatile in Java but only changes to reference pointing to an array will be visible to all threads, not the whole array

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Q924. Can we have 3 dimensional arrays in Java ?

Core Java

Ans. Yes

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Q925. Can we declare an array without assigning the size of an array?

Core Java

Ans. No, It will throw compile time error saying "must provide either dimension expressions or an array initializer"

Alternatively we can provide array initializer like

String[] strArray = new String[]{"Buggy","Bread"};

which will initialize it to size 2 with values as "Buggy" and "Bread"

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Q926. Find the length of the non repeated numbers in an array.

Data Structure

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Q927. Given an array, find the minimum inverting factor.

Design

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Q928. Find number of recycled pairs in n array.

Data Structure

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Q929. Write code to serialize and deserialize an array of strings ?

Core Java

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Q930. Given a max-heap represented as an array, Return the n th largest element without modifying the heap.

Algorithm

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