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

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Q901. How do you debug Javascript code ?

JavaScript

Ans. Possible Answer - I use either Firebug or Chrome Developer tool.

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Q902. What are the advantages of using cascade style sheets or css ?

CSS

Ans. We can enforce consistent UI and can have single point of change for UI components.'

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Q903. What is the difference between Java OR operator and Java script OR operator ?

JavaScript

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Q904. Can you create html and css for a rectangular shape button with width 10px.

CSS

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Q905. If we have width of an html element as 100px and a border of 10 px. What will be the effective width of the element ? Will the border start after 100 px or after 90 px ?

Html

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Q906. Can you tell something about Web security ?

Web

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Q907. Can you name few Java packages which you frequently used ?

Core Java

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Q908. Draw uml for singleton pattern.

Design

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Q909. What is hashing ?

data structure

Ans. Hashing is a technique to calculate the hash code for any object

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Q910. is Java top down programming language or bottom up programming language?

Core Java

Ans. bottom up programming language

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Q911. Suppose you have 8 balls, one of them is either have more/less weight, In how many least possible iterations would you find that ball?

Design

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Q912. How would you design a Thread Pool ?

Design

Ans. By using Executor Framework , we can create Thread pool

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Q913. Write Java code that would cause deadlock ?

Core Java

Ans. https://howtodoinjava.com/java/multi-threading/writing-a-deadlock-and-resolving-in-java/

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Q914. How Bitly shortens the URL ?

Web

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Q915. Design database schema for Facebook like application.

Database

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Q916. how is the internal code for the "volatile" implemented ?

Core Java

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Q917. Difference between sleep() and Wait()

Operating System

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Q918. Can methods without a return type be declared in Java? Is there a difference between void return type and no return type ?

Core Java

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Q919. What is the default execution method in Java?

Core Java

Ans. public static void main(String[] args)

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Q920. What will happen if there is an exception in Java finally block ?

Core Java

Ans. The regular behavior of exception handling will occur. It will look for any immediate catch handler and if none is provided, it would be transmitted to the callers until a catch handler is found or it's out of main function.

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Q921. Can you explain any of your project bug for which you had to struggle a lot ?

General

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Q922. What is immutability and What are it's disadvantages ?

Design

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Q923. What are the disadvantages of Design Patterns ?

Design Pattern

Ans. 1. Design patterns are abstraction heavy and hence sometimes creates memory and performance overheads.

2. Sometimes they create unnecessary complexity without much added advantage.

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Q924. Design a Whats app like messaging application.

architecture

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Q925. Difference between final and finally

Core Java

Ans. final can be used for variables , methods and class. A final variable cannot be changed , a final method cannot be overridden , a final class cannot be inherited.

Finally is a block which is used after Try and catch, a finally block is always executed.

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Q926. Design a Program to clone an object and all it's children.

Design

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Q927. What is the difference between dynamic programming and the brute force algorithm?

Algorithm

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Q928. Why does an array need continuous memory locations and not Linked List ?

Data Structure

Ans. Array needs continuous memory location because it need to provide random access of it's elements which is not required for Linked List.

Array index acts as an offset from the base address and hence can retrieve the respective element using the expression Base Address + ( Index * Element Size ). This expression could only hold true if the elements are in continuous memory location.

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Q929. Why does an array index starts at 0 and not 1 ?

Data Structure

Ans. The array index starts with 0 because program locates an element using the expression ( BaseAddress + ( Index * size of array Element ), where index is used as an offset. As the starting address is actually the address of first element, the index of first element is used as 0 and so on.

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Q930. How will you implement your own custom hashmap and linkedlist ?

Data Structure

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