Zensoft Technologies Software QA Engineer Interview Questions and Answers

Q1. What is the difference between an abstract class and an interface in object-oriented programming?
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have method implementations, while interface cannot.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Interfaces are used to define contracts for classes to implement, while abstract classes are used to provide a common base for subclasses.

• Example: Abstr...read more
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Q2. Abstract classes can have implemented methods; interfaces can only have declarations (before JAVA 8).
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Q1. What is the implementation of Merge Sort in Java?
Ans. 
Merge Sort is a divide and conquer algorithm that divides the input array into two halves, recursively sorts them, and then merges the sorted halves.
• Divide the input array into two halves

• Recursively sort the two halves

• Merge the sorted halves back together
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Q2. What is the implementation of the Quick Sort algorithm in Java?
Ans. 
Quick Sort is a popular sorting algorithm that uses a divide-and-conquer approach to sort elements in an array.
• Choose a pivot element from the array.

• Partition the array into two sub-arrays: elements less than the pivot and elements greater than the pivot.

• Recursively apply the same process to the sub-arrays.

• Combine the sorted sub-arrays to get the final sorted array.
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Q1. Design tinyurl system design
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Q1. They asked Java coding question
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First round is apti when in placement

Too hard all are dsa questions

Q1. Details of what we did on college , project and few programs .
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1.30
Basic profit/loss,percentages questions

Q1. 1 hr Asked about closures, hoisting, map, hash
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Q2. Closures and scopes
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Q3. Dsa 2 sum problem
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Q4. Projects and basicjs
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Q1. Basic related to location, timings
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Q1. What is STLC? What is defect life cycle?
Ans. 
STLC stands for Software Testing Life Cycle. Defect life cycle is the process of identifying, reporting, and resolving defects in software.
• STLC is a series of activities performed during the testing process.

• It includes test planning, test design, test execution, and test closure.

• Defect life cycle consists of various stages like identification, logging, triaging, fixing, retesting, and closure.

• Defects are reported, trac...read more
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Q2. What are assess modifiers in java?
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Access modifiers in Java control the visibility and accessibility of classes, methods, and variables.
• There are four access modifiers in Java: public, private, protected, and default.

• Public access modifier allows unrestricted access from any class.

• Private access modifier restricts access to only within the same class.

• Protected access modifier allows access within the same package or subclasses.

• Default access modifier (n...read more
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Q3. What is garbage value?
Ans. 
Garbage value is an unpredictable or random value that is stored in a variable when it is not assigned a specific value.
• Garbage values occur when a variable is declared but not initialized.

• They can be caused by uninitialized variables, memory leaks, or accessing uninitialized memory.

• Garbage values can lead to unexpected behavior and bugs in software.

• Example: int x; // x may contain a garbage value until assigned a spec
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