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

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Q2041. How to deal with double hop authentication issue?

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Q2042. Have you ever used java.util.Objects class ?

Core Java

Ans. Yes, We are using requireNonNull method for validating if the object is null.

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Q2043. If a high CPU Usage happens everyday at a particular time, How would you go about fixing it ?

Server

Ans. We can provision more instances for that particular time slot.

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Q2044. Why AWS is better than Azure ?

Cloud Computing

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Q2045. What is a reflexive equals contract ?

Core Java

Ans. An equal contract is said to be reflexive is equality between 2 objects always returns to be true.

For example -

Object o1;
Object o2;

o1.equals(o2); // returns true
o2.equals(o1); //returns true

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Q2046. Explain Transitive equals contract.

Core Java

Ans. The equals contract is said to be transitive if

obj1.equals(obj2); and obj2(.equals(obj3)

then obj1.equals(obj3) also returns true.

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Q2047. What sets you apart from other developers ?

or

What are the distinguished qualities you have ?

General

Ans. https://blog.timesunion.com/careers/the-10-most-important-personality-traits-for-career-success/633/

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Q2048. Create an event class in Java.

Core Java

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Q2049. How does multi threading improve performance ?

Core Java

Ans. Every process in it's timeline require different resources. Utilization of resources can be optimized when they are shared among different processes or threads. When one thread is sleeping waiting for a peripheral to complete (e.g. a disk write, or a key press from the keyboard), other threads can continue using processor time and hence would lead to better usage of resources.

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Q2050. What is Time slicing with respect to Threads ?

Operating System

Ans. Time Slicing is the process to divide the available CPU time to the available runnable threads.

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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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