Dreamline Technologies Interview Questions and Answers

Q1. Asked about the details of my projects
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Q2. Digital question related to flip flop and mux.
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Q3. Assertion, constraint questions
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Q4. Asked about different ways of saving power
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1hr interview, asked checker code, checked protocol knowledge mentioned in Resume, asked assertion.

Q1. Draw Digital circuit question based on the waveform
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Q2. Asked about code coverage in details
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Q3. 1 technical puzzle, to print infinite series of a given pattern
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Q4. 1 logical puzzle, 50ball in box of 1 colour and 50ball of 2nd colour in another box, calculate highest probability to choose 1 colour ball.
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Q1. What is polymorphism
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Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Find missing number from nth number array.
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Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
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Q3. Explain inheritance and it types
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Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
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Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
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There were two rounds of interviews, which included a case study. It felt more like a discussion than a formal interview. Although I was not selected, the overall experience throughout the process was positive. The HR team was very supportive; in fact, they notified me about my non-selection, which is uncommon in the industry.

Q1. Related to my profile
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Q1. Spark code optimization
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Q2. Data formats in big Data, why each format.
Ans. 
Different data formats in big data are used for various purposes like storage efficiency, data processing speed, and compatibility with different systems.
• JSON: Lightweight, human-readable, and widely supported for web applications.

• Parquet: Columnar storage format for efficient querying and processing of large datasets.

• Avro: Schema-based serialization format with support for complex data types.

• ORC: Optimized Row Columna...read more
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Q3. Leet code - Most freq elem in a list
Ans. 
Find the most frequent element in a list of strings.
• Iterate through the list and count the frequency of each element using a dictionary.

• Track the element with the highest frequency as you iterate.

• Return the element with the highest frequency.
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Q1. Na not applicable
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Q2. Na not applicable right now
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Q1. Check if the linked list is palindrome or not
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To check if a linked list is a palindrome, compare the first half of the list with the reversed second half.
• Traverse the linked list to find the middle node

• Reverse the second half of the linked list

• Compare the first half with the reversed second half to check for palindrome
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Q2. C string questions
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Q1. Operating systems questions
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Q2. Linked list and system design question
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Q1. All networking and testing technique
Ans. 
Networking and testing techniques are essential for ensuring the functionality and performance of software applications.
• Understanding of networking protocols such as TCP/IP, HTTP, and DNS is crucial for testing network-based applications.

• Knowledge of testing techniques like black box testing, white box testing, and regression testing is important for ensuring comprehensive test coverage.

• Experience with tools like Wires...read more
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Q1. Scenario based questions
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Q1. What are the HR function?
Ans. 
HR functions include recruitment, training, performance management, employee relations, and compliance.
• Recruitment - Attracting, selecting, and hiring employees.

• Training - Providing employees with necessary skills and knowledge.

• Performance Management - Evaluating and improving employee performance.

• Employee Relations - Handling conflicts and promoting a positive work environment.

• Compliance - Ensuring adherence to labor
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Q2. What are the principle of HR?
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The principles of HR involve treating employees fairly, promoting diversity and inclusion, ensuring compliance with laws and regulations, and fostering a positive work culture.
• Fair treatment of employees is essential in HR practices.

• Promoting diversity and inclusion leads to a more innovative and productive workforce.

• Compliance with laws and regulations ensures a safe and legal work environment.

• Fostering a positive wor
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