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

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Q2491. Difference between TreeMap and SortedMap ?

Ans. sortedMap is an interface ,while TreeMap is an implementation of sortMap.

We can not create an instance of sortedMap but we can create an instance of treeMap

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Q2492. Difference between HashMap and Dictionary in Java ?

Core Java

Ans. HashMap implements the Map interface while the Dictionary does not.

HashMap was introduced after HashTable and Dictionary.

Dictionary is currently obsolete in java.

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Q2493. Difference between System.getEnv and System.getProperties ?

Core Java

Ans. System.getEnv gets the environment variables where System.getProperties gets Java properties.

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Q2494. Can we load environment variables into Properties in Java ? How ?

Core Java

Ans. Yes

new Properties().putAll(System.getenv());

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Q2495. Can we have two interfaces having method with same name and arguments?

Core Java

^{This question was recently asked at 'Boeing'.This question is still unanswered. Can you please provide an answer.}

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Q2496. If you are asked to test an application without any documentation, What type of testing will you do ?

Testing

Ans. White Box Testing
Unit Testing
Ad Hoc Testing

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Q2497. how hashmap work? Write a program that uses map interface ?

Core Java

^{This question was recently asked at 'Huawei'.This question is still unanswered. Can you please provide an answer.}

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Q2498. What is cluster ?

^{This question was recently asked at 'idealake information technologies'.This question is still unanswered. Can you please provide an answer.}

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Q2499. What is the concept of hibernate versioning ?

Hibernate

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Q2500. If we have a return statement inside the finally block, Then what will happen ?

Core Java

Ans. Returning from inside a finally block will cause exceptions to be lost. A return statement inside a finally block will cause any exception that might be thrown in the try block to be discarded.

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Q2501. Can we have more than two constructors in a class ?

Core Java

Ans. Yes, through constructor overloading

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Q2502. What is something faulty about java ?

Core Java

Ans. Not purely object oriented Language.

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Q2503. What is object slicing ?

C++

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Q2504. What are meta classes in Java ?

Core Java

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Q2505. What are the distributed caches ?

Server

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Q2506. Create DB schema for Employee, Department.

Database

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Q2507. Can we have 2 styling classes with a single div element ? Which class will take precedence in case of conflict in such case ?

CSS

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Q2508. How do you debug Javascript code ?

Javascript

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Q2509. Where will you configure database details in tomcat server ?

Tomcat

Ans. Add a file META-INF/context.xml into the root of your web application folder, which defines database connection detail :

File : META-INF/context.xml

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Q2510. How elements are passed to the server in case of Get and Post request ?

Web Service

Ans. In case of Get request, form data / values are sent within url whereas these are sent as part of request body in case of Post.

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Q2511. Have you ever faced any problem because of PrintWriter buffer and autoflush mechanism ? How did you got rid of it ?

Core Java

Ans. Yes , we faced trouble once wherein we were trying to set certain elements to the PrintWriter. As in some cases the PrintWriter held too much information and hence it would get flushed before we could append those elements.

We disabled auto flushing and provided our own explicit flushing.

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Q2512. Can we disable auto flushing for PrintWriter ?

Core Java

Ans. Yes

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Q2513. Can we increase the buffer size while working with Buffered Streams ? How ?

Core Java

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Q2514. What are the 22 possible values of x where x== -x (true) ?

Core Java

Ans. byte x = 0;
short x = 0;
char x = 0;
int x = 0;
int x = Integer.MIN_VALUE;
float x = 0.0f;
float x = -0.0f;
long x = 0;
long x = Long.MIN_VALUE;
double x = 0.0;
double x = -0.0;
Byte x = 0;
Short x = 0;
Character x = 0;
Integer x = 0;
Integer x = Integer.MIN_VALUE;
Float x = 0.0f;
Float x = -0.0f;
Long x = 0L;
Long x = Long.MIN_VALUE;
Double x = 0.0;
Double x = -0.0;

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Q2515. What is Docker ?

Docker

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Q2516. Details of networking apis supported by java.

Ans. retrofit 2, volly and OkHttp

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Q2517. What are different awt constructs ?

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Q2518. Combine and join integer and string list to single list and sort.

Core Java

Ans. Object[] combined = new Object[first.length second.length];
System.arraycopy(first, 0, combined, 0, first.length);
System.arraycopy(second, 0, combined, first.length, second.length);

-- OR --

Object[] combined = Stream.concat(Arrays.stream(first), Arrays.stream(second)).toArray();

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Q2519. Difference between interface and inheritance

Core Java

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Q2520. What is stereotype annotation ?

Spring

Ans. These annotations are used to create Spring beans automatically in the application context. The main stereotype annotation is @Component . @Controller: Which is used to create Spring beans at the controller layer. The stereotype annotations in spring are @Component, @Service, @Repository and @Controller

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