Blackrock interview experience Real time questions & tips from candidates to crack your interview
QA Engineer
Blackrock
4 rounds | 8 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 2 months
Topics: Core Java, Selenium, Jenkins, CI/CD, Testing concepts
Tip 1 : Practice as many as String Manipulation programs
Tip 2 : OOPS concepts and their practical usage
Tip 3 : Testing terminologies
Application process
Where: Linkedin
Eligibility: No criteria
Tip 1 : Try to build a single Page resume
Tip 2 : Include skills that are known to you
Interview rounds
01
Round
Easy
Telephonic
Duration30 Minutes
Interview date4 Feb 2019
Coding problem1
Introduction
Basic Testing questions and OOPS concepts
Selenium locators - xpath, css
Absolute, Relative Xpath
finding webelements in grid based tables
Selecting Dropdowns/Radio button
1. Technical Questions
1) What are 4 pillars of OOPS in Java
2) What is Absolute, Relative Xpath
3) Class, Object, Constructor definitions
4) How to find multiple Webelements from the table grid in Selenium
5) Methods to select Dropdown, Checkboxes
Problem approach
1) Abstraction, Polymorphism, Encapsulation, Inheritance and explain definitions.
2) Absolute - From the starting of the DOM /
Relative - Direct x path using element tags //
3) State definitions
4) using getWebElements() method
02
Round
Medium
Face to Face
Duration40 Minutes
Interview date12 Feb 2019
Coding problem3
Face To Face interview round with 2 interviewers
Timing : 11::00 AM
3-4 candidates around
Interviewers were professional
1. Star Pattern
Easy
10m average time
85% success
0/40
Asked in companies
Print the following pattern
Pattern for N = 4
The dots represent spaces.
Problem approach
Break the problem into two parts.
Print the incremental pattern using 2 for loops
Print the decremental pattern using 2 for loops
Combine the two patterns
2. Manipulate the String to remove the Junk character from String
Problem approach
Using String replace() method and using regular expression
3. Selenium snippet code to add different waits to the elements
Problem approach
Implicitly wait - driver.manage().timeouts().implicitlyWait(0, TimeUnit.SECONDS);
Explicitly Wait -
WebElement dynamicElement = (new WebDriverWait(driver, 15))
.until(ExpectedConditions.presenceOfElementLocated(By.id("dynamicElement")));
03
Round
Medium
Face to Face
Duration30 Minutes
Interview date14 Feb 2019
Coding problem3
Managerial round
Timing 12: 00 AM
Interview by Senior Manager
1. Puzzle
Torch and Bridge
There are 4 people (A, B, C, and D) who want to cross a bridge at night.
A takes 1 minute to cross the bridge.
B takes 2 minutes to cross the bridge.
C takes 5 minutes to cross the bridge.
D takes 8 minutes to cross the bridge.
There is only one torch with them and the bridge cannot be crossed without the torch. There cannot be more than two persons on the bridge at any time, and when two people cross the bridge together, they must move at the slower person’s pace.
Problem approach
Tip 1 : Think and take your time
Tip 2 : Use paper/pen to explain
2. System Design Question
How will you manage the Sanity & Regression suite in an effective manner?
Problem approach
Regression test selection
Regression test tracking mechanism
Monitoring changes
Periodic cleanup
Regular screening
Metrics analysis
3. System Design Question
Explain CI/CD infrastructure design used in your previous organization.
Problem approach
Tip 1 : Explain how to execute tests on VM.
Tip 2 : Explain Jenkins setup and link to the git repo.
04
Round
Easy
HR Round
Duration30 Minutes
Interview date26 Feb 2019
Coding problem1
HR round and offer collection
Timing : 10:00 AM
1. Basic HR question
How do you see yourself in 5 years
How will you display inclusivity among the team
Relocation details
Problem approach
Tip 1 : Be calm with a smiling face
Tip 2 : Answer the questions with positive attitude
Tip 3 : Clear any doubts in your mind related to package, holidays, benefits
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
How do you remove whitespace from the start of a string?
Choose another skill to practice
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