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

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Q2431. Can we override behavior of a collection class ? How ?

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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Q2432. How does hashmap works ?

Core Java

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Q2433. What is the time complexity and space complexity of reversing a Linked List ?

Data Structure

Ans. o(n) for time complexity
o(1) for space complexity

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Q2434. Write an algorithm to shift a linked list n positions.

Data Structure

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Q2435. What are FPGA's ?

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Q2436. What is life cycle of cloud deployment process ?

Cloud Computing

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Q2437. What would you do if your rest services aren't responding fast enough ?

Rest

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Q2438. If you see a terrible code, Would you rewrite it. If yes , Why ?

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Q2439. If you are given a stack trace , what would you look for ?

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Q2440. What are the ways we can get over XSS or cross site scripting vulnerability ?

Security

Ans. The counter measures of XSS are input validation and implementing a CSP (Content Security Policy).

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Q2441. How can an XSS attack harm a system ?

Security

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Q2442. What are the types of clouds in cloud computing ?

Cloud Computing

Ans. Private, Public, Hybrid, Community

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Q2443. Class and Object methods.

Core Java

Ans. class:- A class describe the contents of an object, an it describe the detail of data field called instance variable and defines the operations called method.

Object:-An object is an element of a class. Object have the behaviors of their class.

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Q2444. Difference between merge and update in hibernate

Hibernate

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Q2445. 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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Q2446. how to switch to the parent webpage?

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Q2447. 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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Q2448. 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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Q2449. what is dynamic method dispatch

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Q2450. what is green threads

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Q2451. What is java machine control

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Q2452. 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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Q2453. What is ado.net ?

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Q2454. What is the use of toString method ?

Core Java

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Q2455. How does Garbage Collector work? What are the realizations of Garbage Collector.

Core Java

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Q2456. What is the O notation for the ArrayList and List? And which one would you choose to insert item in the middle?

Data Structure

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Q2457. How to sort an ArrayList of objects

Data Structure

Ans. Using Collections.sort()

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Q2458. Differentiate osi and tcp/ip models and describe them

Networking

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Q2459. what are system calls

Operating System

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Q2460. What is size of structure in c ?

C++

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