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

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Q2051. What is Thread scheduler ?

Operating System

Ans. Thread Scheduler is the Operating System service that allocates the CPU time to the available runnable threads.

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Q2052. What are the different ways to avoid multi Threading related problems in Java ?

Core Java

Ans. Synchronization,
Concurrent classes,
Volatile keyword,
Implementing concurrent Lock interface,
Immutable classes

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Q2053. What is context switching wrt Threads in Java?

Core Java

Ans. Context Switching is the process of storing and restoring of CPU state so that Thread execution can be resumed from the same point at a later point of time.

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Q2054. Why Concurrent Collection Classes are fail-fast in Java ?

Core Java

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Q2055. Can a class extend itself in Java ?

Core Java

Ans. No

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Q2056. What is method hiding in Java ?

Core Java

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Q2057. Can we declare constructor inside an interface ? Why ?

Core Java

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Q2058. Can we declare an Interface with abstract keyword ?

Core Java

Ans. Yes

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Q2059. Does Java generate .class file for interfaces ?

Core Java

Ans. Yes

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Q2060. What is the difference between ArrayIndexOutOfBoundException and ArrayStoreException?

Core Java

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Q2061. What is ArrayStoreException ?

Core Java

Ans. It's an exception that is thrown when we attempt to add value of an incompatible type to an array.

For example -

Object[] strArray = new String[2];
strArray[0] = 5;

In this code, strArray reference of type Object has currently been assigned the String array but at line 2 we are trying to add an integer value.

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Q2062. Can you write code to copy one array into another ?

Data Structure

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Q2063. Difference between Arrays and LinkedList ?

Data Structure

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Q2064. What is the ideal situation / case for using heap sort ?

Algorithm

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Q2065. In an array every element is repeated twice except one, Find that element?

Data Structure

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Q2066. Given a max-heap represented as an array, Return the n th largest element without modifying the heap.

Algorithm

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Q2067. Find number of recycled pairs in n array.

Data Structure

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Q2068. Find the length of the non repeated numbers in an array.

Data Structure

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Q2069. 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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Q2070. Write a program to insert a value after a specific value in an array.

Data Structure

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Q2071. Which Java version supports Interface Default methods ?

Core Java

Ans. Java 1.8 or Java 8

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Q2072. Tell something about Sleep method.

Core Java

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Q2073. 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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Q2074. 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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Q2075. Diff between Runtime.getRunTime().gc() and System.gc()

Core Java

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Q2076. How to run jar file using command prompt

Core Java

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Q2077. 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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Q2078. Which memory segment holds the byte code ?

Core Java

Ans. Code Segment

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Q2079. Have you ever worked on migrating AWS services and databases from one account to another ?

Amazon Web Services (AWS)

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Q2080. Have you worked with Data Feeds ?

General

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