Thursday, 12 May 2022

Top 50 GIT Common Interview Q&A on Real Time scenarios for SDET - SDE - QAE? GIT real time scenarios to resolve issues

 


.

Pipeline Script Fundamentals

Click Here :   DevOps Related Posts

 Check GIT commands for Interview preparation SET-1:

GIT Interview Question 1 to 11

Check GIT commands for Interview preparation SET-2:

GIT Interview Question 12 to 21

Check GIT commands for Interview preparation SET-3:

GIT Interview Question 21 to 30


41. How to push code to existing remote branch in Github?


Push your branch to the remote repository:
git push -u origin feature_branch_name


42. How do I force git pull to overwrite the local file changes?


Note: If you have local unpushed commits this will remove them from your branch!

First, run a fetch to update all origin/<branch> refs to latest:(downloads the latest from remote without trying to merge or rebase anything)

git fetch --all


Backup your current branch:

git branch backup-master


Then, you have two options:

git reset --hard origin/master

OR If you are on some other branch:

git reset --hard origin/<branch_name>


//git reset resets the master branch to what you just fetched. 

//The --hard option changes all the files in your working tree to match the files in origin/master


WHY AUTOMATION QA SHOULD LEARN GIT?


Git is a powerful version control system that allows developers to manage changes to their codebase. Although Git was originally designed for software development, it has become an essential tool for automation testing as well. Here are some reasons why learning Git is important for automation testing:

  1. Version control: Git helps you keep track of changes to your test code over time. With Git, you can create a repository for your tests, and every time you make changes to your test code, you can commit those changes to the repository. This allows you to revert to an earlier version of your test code if necessary.

  2. Collaboration: Git allows multiple people to work on the same codebase simultaneously. This is useful for automation testing, where multiple testers may need to work on the same set of tests. With Git, testers can work on their own branch of the codebase and merge their changes into the main codebase when they're ready.

  3. Continuous integration: Git integrates well with continuous integration (CI) tools like Jenkins, Travis CI, and CircleCI. These tools allow you to automatically build, test, and deploy your code every time you make changes to the codebase. With Git, you can configure your CI tool to trigger builds and tests whenever changes are pushed to the repository.

  4. Code review: Git allows you to create pull requests, which are requests for other team members to review your code changes. This is a useful feature for automation testing, where it's important to ensure that your tests are of high quality and cover the necessary functionality. Pull requests allow other testers to review your tests and suggest improvements or catch errors.

Overall, Git is an essential tool for automation testing because it allows you to manage changes to your test code, collaborate with other testers, integrate with CI tools, and review code changes. Learning Git will make you a more efficient and effective automation tester.


43. Difference between soft, mixed, and hard resets?


Ans: Click Here For Answer


44. How to undo a git merge with conflicts?


The solution is quite dependent on the version of GIT you are using.


Latest Git Version:

git merge --abort


This attempts to reset your working copy to whatever state it was in before the merge. 


Prior to version 1.7.4:

git reset --merge


This is older syntax but does the same as the above.


Prior to version 1.6.2:

git reset --hard


 How to integrate Maven project with Jenkins?


ANS:  Maven & Jenkins Integration


45. What does cherry-picking a commit with GIT means?


Ans:  Let's Consider the following scenario. You have two branches.

a) release2 - This branch is going to your customer, but there are still some bugs to be fixed.

b) master - Classic master branch, where you can for example add functionality for release2.


NOW: You fix something in release2. Of course you need this fix also in master. And that is a typical use-case for cherry picking. So cherry pick in this scenario means that you take a commit from release2 branch and include it into the master branch.



46. Difference between rebase and merge?

    Ans: 
Click Here For Answer



47. How to delete a branch from local and remote?


To delete a local branch you can use below command

git branch -d the_local_branch

To remove a remote branch: be careful while doing this as it will delete a remote branch!

git push origin :the_remote_branch

or use the new syntax (v1.7.0)


git push origin --delete the_remote_branch


48. How to recover the dropped stash in GIT?


Ans: If you know the hash of the stash commit you have dropped, you can apply it as a stash:

git stash apply $stash_hash


49.How to create repository in bitbucket and push code 

for automation project?


Ans: Click Here For The Steps



50. What is the meaning of git conflict markers? VERY VERY IMP


Ans: Let's assume that after we pulled from remote branch, we got conflict, when we open the file it looks something like below:

<<<<<<< HEAD:file.txt

Hello world

=======

Adios Amigos

>>>>>>> 77976da35a11db46586:file.txt

A. The lines between the lines beginning <<<<<<< and  ======here:


<<<<<<< HEAD:file.txt

Hello world

=======

This above is what we already had locally - you can tell because HEAD points to your current branch or commit. 

B. The lines between the beginning ======= and >>>>>>>:

=======

Adios Amigos

>>>>>>> 99976da35a22db46586:file.txt

This is what was introduced by the other (pulled) commit, in this case 99976da35a22



51. Command to delete the file from your working directory and stages the deletion?


Ans: Click Here For Answer



REVISON:




32. How to rename a branch in GIT while working on it?


We can use the below command for renaming of the branch:

git branch -m <new name>


Click Here :   DevOps Related Posts



33. If we want to rename the branch from outside the branch then how we can do it?


git branch -m <old name> <new name>



39. How to track the remote branches in GIT?


Assuming there is a remote repository that you cloned your local repository from and also assuming that there is a branch named 'remote_branch' on that remote repository, here is how to track it locally:


# list remote branches

git branch -r


# start tracking one remote branch

git branch --track remote_branch origin/remote_branch


40.How to create repository in bitbucket  and push code for automation project?


       Ans: Click Here For The Steps


*******************************************************************

For any doubts or career guidance, arrange a 1:1 call with me 


https://topmate.io/sidharth_shukla


********************************************************************


Learn (API-Microservice)Testing+(CoreJava+UI)-SDET 

with Self Paced Videos and one LIVE Doubt Session

TRANING VIDEOS AVAILABLE with Live Doubt Session @4500/-(course-1 below,

API TRaining Videos With ClassNotes and Coding Set) and 6500/- (API+UI, both course-1 & 2 below) 

Check Training Page for Course Content or reach out @whatsapp +91-9619094122




Entire course content can be found below:  COURSE CONTENT


 Check GIT commands for Interview preparation SET-1:

GIT Interview Question 1 to 11

Check GIT commands for Interview preparation SET-2:

GIT Interview Question 12 to 21

Check GIT commands for Interview preparation SET-3:

GIT Interview Question 21 to 30

*************************************************

SeleniumWebdriver Automation Testing Interview Questions:

https://automationreinvented.blogspot.com/search/label/SeleniumWebdriver

API Testing Interview Question Set:
https://automationreinvented.blogspot.com/search/label/Rest-API

 
Kubernetes Interview Question Set
https://automationreinvented.blogspot.com/search/label/Kubernetes

 
Docker Interview Question Set
https://automationreinvented.blogspot.com/2020/02/top-18-docker-commands-for-aytomation.html

 
Linux Interview question Set
https://automationreinvented.blogspot.com/search/label/Linux

 
Automation Testing/SDET Framework Design
https://automationreinvented.blogspot.com/search/label/FrameworkDesign


Java Related Interview Question Set
https://automationreinvented.blogspot.com/search/label/Java


GIT Interview Question Set:
https://automationreinvented.blogspot.com/search/label/GIT


Coding Interview Question Set:
https://automationreinvented.blogspot.com/search/label/Coding%20Questions










Wednesday, 11 May 2022

Top 50 Java interview questions and answers for SDET - QAE - SDE on OOPS Concepts?

 


Java INterview Question SET-01

Java INterview Question Set-02 ARRAY

Java INterview Questiona Set-03 MAP

Java INterview Question Set-04

Java is a very important topic for both developers and testers. It's very difficult to remember all the Java basics, so it's always wise to do a revision before the day of the interview. 

Check out the Top 50 most asked core java interview questions and answers.

Top 50 Java Interview Questions and Answers:

SDET Interview Questions and Answers.  

Jenkins Interview Questions and Answers.


If you are new to Java and your setup is not yet completed, then refer to the link on How to setup JDK on Windows/Linux/MacOS?


1) What is static blocks in Java ?

Static blocks  are used to initialize static fields in java. 

We declare static blocks when we want to initialize static fields in our class. 

Static blocks get executed exactly once the class is loaded. 

Static blocks are executed even before the constructors are executed. 

Syntax:

static {
   // Logic here or Java code.
 }

static block executed before the main method, to check try the code below in your IDE:

public class Test { 
 static { 
   System.out.println("Static block");
 }
public static void main(String [] args){
     System.out.println("Main method running");
 }
}

2. What is super keyword in java ?

Variables and methods of super class can be overridden in subclass .
. Super is used to access superclass variables, methods, and constructors.

Super can be used in two forms :

  1. 1)   to call a super class constructor.

  2. 2)  to call super class variables and methods.

Super if presented it must be the first statement.

It is used to: 

  1. To call methods of the superclass that are overridden in the subclass.
  2. To access attributes of the superclass if both superclass and subclass have attributes with the same name.
  3. To explicitly address superclass non-arg or parameterized constructor from the subclass constructor.

Explain Compilation and Execution in Java with examples?



3. Why is Java platform independent?

The most unique feature of java is that it's platform independent. In any programming language, source code is compiled into executable code. This cannot be run across all platforms. When javac compiles a java program it generates an executable file called .class file.


The class file contains byte codes. Byte codes are interpreted only by JVM’s . Since these JVM’s are made available across all platforms by Sun Microsystems, we can execute this byte code on any platform. Byte code generated in windows environment can also be executed in linux environment. This makes java platform independent.

4.Difference between this() and super() in java ?

this() is used to access one constructor from another with in the same class while super() is used to access superclass constructor. Either this() or super() exists it must be the first statement in the constructor.

5. How to Add/Join/Combine two lists?

Ans:  Click Here For Answers 

6. Explain about main() method in java ?

Main() method is the starting point of execution for all java applications.

public static void main(String[] args) {}
String args[] are array of string objects we need to pass from command line arguments. Every Java application must have at least one main method. 

public : “public” is an access specifier which can be used outside the class. When main method is declared public it means it can be used outside class.
static : To call a method we require an object. Sometimes it may be required to call a method without the help of an object. Then we declare that method as static. JVM calls the main() method without creating object by declaring keyword static.

void : void return type is used when a method does’nt return any value . main() method does’nt return any value, so the main() is declared as void.


"String Question and Answers<== Click


7. What is method overloading in java ?

A class having two or more methods with same name but with different arguments then we say that those methods are overloaded. Static polymorphism is achieved in java using method overloading.
Compiler decides which method to call at compile time. Using overloading static polymorphism or static binding can be achieved in java.

Note: Return type is not part of the method signature. we may have methods with different return types, but the return type alone is not sufficient to call a method in java. 

For a real-time example with code on method overloading please refer the link HERE

8. Difference between Hashmap and Hashtable?

Ans: Click Here For Answer

9. What is the use of constructor in Java?

Ans: A constructor is a special method used to initialize objects in java.

we use constructors to initialize all variables in the class when an object is created. As and when an object is created it is initialized automatically with the help of constructor in java.


10. Explain Java Coding Standards for variables?

Variable names should start with small letters.

Variable names should be nouns

Short, meaningful names are recommended.

If there are multiple words, every inner word should start with uppercase characters.


11.  Difference between ArrayList and HashMap in Java?

Ans: Click Here For Answer 

12. 
What is the difference between processes and threads ?

A process is an execution of a program, while a Thread is a single execution sequence within a process. 

A process can contain multiple threads. A Thread is sometimes called a lightweight process. 

13. Explain what the available thread states at a high-level?

During its execution, a thread can reside in one of the following states:

Runnable: A thread becomes ready to run, but does not necessarily start running immediately. • Running: The processor is actively executing the thread code.

Waiting: A thread is in a blocked state waiting for some external processing to finish.

Sleeping: The thread is forced to sleep.

Blocked on I/O: Waiting for an I/O operation to be completed. • Blocked on Synchronization: Waiting to acquire a lock.

Dead: The thread has finished its execution. 

14. How does Hashmap work internally?

Ans: Click Here For Answers with Explanation


Array Question and Answers } <--Click

Java INterview Question SET-01

Java INterview Question Set-02 ARRAY

Java INterview Questiona Set-03 MAP

Java INterview Question Set-04


Revision:

How do you iterate through a hashmap?


Ans: using entryset:
for
 (Map.Entry<String, Integer> e : map.entrySet())

            System.out.println("Key: " + e.getKey()

                               " Value: " + e.getValue());

    }



Does the hashmap allow duplicate keys and values?


Ans:

Hashmap doesnt allow duplicate keys, but allows duplicate values


How to call a method in Java with and without an object?
 
Ans: Click the link for answers

 How to replace values in a hashmap?


with replace():Replaces the entry for the specified key only if it is currently mapped to some value


HashMap<String, Integer> map = new HashMap<>();

map.put("james", 10);

map.replace("james", 50);


What is a Hashmap? 


- Part of Collection Framework

- Implement Map interface

- There are 4 main fields which are Hash, Key, Value, Node


 How to find duplicate elements using Hashmap ?


Ans: Click here for Answer With Code



*************************************************

FACTS about FINAL is Java: 

- final class: the class cannot be extended

- final method: the method cannot be overridden

- final field: the field is a constant

- final variable: the value of the variable cannot be changed once assigned

*********************************************

*******************************************************************
For any doubts or career guidance, arrange a 1:1 call with me 


********************************************************************


Learn (API-Microservice)Testing+(CoreJava+UI)-SDET

with Self Paced Videos and one LIVE Doubt Session

TRANING VIDEOS AVAILABLE with Live Doubt Session @4500/-(course-1 below,
API TRaining Videos With ClassNotes and Coding Set) and 6500/- (API+UI, both course-1 & 2 below)
Check Training Page for Course Content or reach out @whatsapp +91-9619094122

Entire course content can be found below:  COURSE CONTENT



SeleniumWebdriver Automation Testing Interview Questions:

API Testing Interview Question Set:
https://automationreinvented.blogspot.com/search/label/Rest-API

 
Kubernetes Interview Question Set
https://automationreinvented.blogspot.com/search/label/Kubernetes

 
Docker Interview Question Set
https://automationreinvented.blogspot.com/2020/02/top-18-docker-commands-for-aytomation.html

 
Linux Interview question Set
https://automationreinvented.blogspot.com/search/label/Linux

 
Automation Testing/SDET Framework Design
https://automationreinvented.blogspot.com/search/label/FrameworkDesign


Java Related Interview Question Set

https://automationreinvented.blogspot.com/search/label/Java


GIT Interview Question Set:
https://automationreinvented.blogspot.com/search/label/GIT


Coding Interview Question Set:
https://automationreinvented.blogspot.com/search/label/Coding%20Questions
Mobile Testing Interview Question Set:
https://automationreinvented.blogspot.com/search/label/Mobile%20Testing



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