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

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Q2011. Why does an array index starts at 0 and not 1 ?

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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Q2012. 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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Q2013. Design a Program to clone an object and all it's children.

Design

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Q2014. Tell something about Dependency Injection and it's drawbacks. In which situation, you may not like to use dependency injection ?

Design

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Q2015. What is setter injection ?

Spring

Ans. Setter Injection in Spring is a type of dependency injection in which the framework injects the dependent objects into the client using a setter method.

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Q2016. 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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Q2017. Given a String with letters , numbers and special characters , extract Tokens from it. The rules for Token extraction are ac follows

1. Should for token of all characters till a number or special character is found
2. Should form token of all numbers till a character or special character is found
3. Special character in itself is a token
4. Ignore white spaces

For example - Bob Said "He is here"

should result in

Bob A
Said A
" S
He A
is A
here A
" S

where a is specifying alphabet and S as special character

Design

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Q2018. Design a Whats app like messaging application.

architecture

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Q2019. What is immutability and What are it's disadvantages ?

Design

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Q2020. 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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Q2021. What is the default execution method in Java?

Core Java

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

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Q2022. 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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Q2023. how is the internal code for the "volatile" implemented ?

Core Java

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Q2024. Design database schema for Facebook like application.

Database

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Q2025. 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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Q2026. How would you design a Thread Pool ?

Design

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

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Q2027. 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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Q2028. is Java top down programming language or bottom up programming language?

Core Java

Ans. bottom up programming language

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Q2029. What is hashing ?

data structure

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

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Q2030. Draw uml for singleton pattern.

Design

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Q2031. Can you name few Java packages which you frequently used ?

Core Java

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Q2032. Can you tell something about Web security ?

Web

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Q2033. 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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Q2034. Can you create html and css for a rectangular shape button with width 10px.

CSS

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Q2035. What is the difference between Java OR operator and Java script OR operator ?

JavaScript

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Q2036. 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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Q2037. How do you debug Javascript code ?

JavaScript

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

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Q2038. Have you ever worked with Firebug ?

Browser

Ans. Possible Answer - Yes, for debugging Javascript issues and fixing CSS and Html.

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Q2039. How can we assign common styling attributes to html tags and how can we do that across different tag types ?

CSS

Ans. Using class selector.

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Q2040. How can we align a particular html element to the center using css ?

CSS

Ans. By using attribute align:center

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