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

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Q1921. Find the second largest array element without sorting?

Ans. We initialize two variables first and second to INT_MIN as,
first = second = INT_MIN
then Start traversing the array,
If the current element in array say arr[i] is greater
than first. Then update first and second as,
second = first
first = arr[i]
If the current element is in between first and second,
then update second to store the value of current variable as
second = arr[i]
then Return the value stored in second.

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Q1922. What is ng injectable ?

Angular Js

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Q1923. Why Spring boot is preferred over Spring MVC ?

Ans. Spring Boot aims to shorten the code length and provide you with the easiest way to develop a web application. It helps create a stand-alone application with less or almost zero-configuration.

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Q1924. What is Message Queue or MQ ?

Data Structure

Ans. Message queues implement an asynchronous communication pattern between two or more processes/threads whereby the sending and receiving party do not need to interact with the message queue at the same time. Messages placed onto the queue are stored until the recipient retrieves them. Message queues have implicit or explicit limits on the size of data that may be transmitted in a single message and the number of messages that may remain outstanding on the queue.

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Q1925. Explain memory leaks and how to prevent them.

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Q1926. What is the logic behind the shuffle in Music player ?

or

Explain Music player shuffle algorithm.

Algorithm

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Q1927. Explain Rest architecture

Rest

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Q1928. Can we override behavior of a collection class ? How ?

Core Java

Ans. Yes. We can do that.

1. We can create own own implementation class extending the collection class and then override the behavior method.

2. We can override the behavior at the time of instantiation of class as following

List<MyType> list = new ArrayList<MyType>() {
public boolean add(MyType mt) {
super.add(mt);
Collections.sort(list, comparator);
return true;
}
};

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Q1929. How do you achieve String immutability ?

Core Java

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Q1930. What are FPGA's ?

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Q1931. What is life cycle of cloud deployment process ?

Cloud Computing

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Q1932. What kind of deployable is created for the angular project ?

Angular Js

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Q1933. What would you do if your rest services aren't responding fast enough ?

Rest

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Q1934. If you see a terrible code, Would you rewrite it. If yes , Why ?

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Q1935. If you are given a stack trace , what would you look for ?

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Q1936. Write a program to make a triangle of stars.

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Q1937. Write a code to detect the longest palindromic substring

Core Java

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Q1938. What is headless mode in Java ? Why is it used ?

Core Java

Ans. It’s a mode that can be used for creating Back end application without the front end UI.

The advantage is that it reduces the number of packages that needs to be loaded ( by ignoring ui packages )

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Q1939. What are the types of clouds in cloud computing ?

Cloud Computing

Ans. Private, Public, Hybrid, Community

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Q1940. Explain switch and router

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Q1941. Difference between merge and update in hibernate

Hibernate

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Q1942. What is the programming language used to build Jenkins?

Jenkins

Ans. There is a diverse set of programming languages used in Jenkins, including but not limited to: Java, JavaScript, Groovy, Golang, Ruby, Shell scripts

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Q1943. how to switch to the parent webpage?

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Q1944. What can be done to protect the application from DDOS attack ?

Security

Ans. We can set the max number of requests from a given IP or an IP range

We can set the time out so that a single request cannot hold on to resources for too long.

We can identify patterns ( like too many requests from single IP for single page ) and then block such requests.

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Q1945. What is SNMP ?

Networking

Ans. SNMP or Simple Network Management protocol is an application layer protocol for exchanging management information between network devices.

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Q1946. what is dynamic method dispatch

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Q1947. what is green threads

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Q1948. What is java machine control

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Q1949. What is a composite primary key and foreign key ?

Database

Ans. The combination of values from multiple columns in the composite primary key must be unique for each row in the table.
A foreign key, on the other hand, is a field or set of fields in one table that refers to the primary key in another table. It establishes a relationship between two tables based on the values of the foreign key and the primary key.

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Q1950. What is ado.net ?

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