Sony India Software Center Java Developer Interview Questions and Answers

Q1. Linux vs Windows
Ans. 
Linux is preferred for server-side development due to its stability and security, while Windows is more commonly used for desktop applications.
• Linux is open-source and free, making it cost-effective for development.

• Windows has a larger user base and more compatibility with software and hardware.

• Linux is known for its stability and security, making it a popular choice for server-side development.

• Windows is more commonly...read more
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Q2. Singleton Class
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Q3. Fail Fast vs Fail Safe
Ans. 
Fail Fast focuses on detecting errors as soon as possible, while Fail Safe aims to continue operation despite errors.
• Fail Fast: Emphasizes immediate error detection to prevent further issues.

• Fail Safe: Prioritizes continued operation even in the presence of errors.

• Example: Fail Fast is commonly used in software development to catch bugs early in the development process.

• Example: Fail Safe is often seen in systems where ...read more
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Q4. HashMap and ConcurrentHashMap
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Q5. Immutable class
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C programming
Cpp programs
Embedded c
Aptitude

Q1. Difference between macro and functions
Ans. 
Macros are preprocessor directives that are replaced before compilation, while functions are blocks of code that are executed at runtime.
• Macros are defined using #define directive, while functions are defined using function keyword.

• Macros are expanded by the preprocessor before compilation, while functions are executed at runtime.

• Macros can be used for simple text replacement, while functions can perform complex operat...read more
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Q2. Difference between exec and fork
Ans. 
exec replaces the current process with a new one, while fork creates a new process.
• exec replaces the current process with a new one, while fork creates a new process

• exec system call loads a new program into the current process's memory space and starts its execution

• fork system call creates a new process by duplicating the existing process
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Q1. About yourself in 200 words
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Q2. Tell about our company
Ans. 
Your company is a leading software development firm specializing in creating innovative solutions for various industries.
• Specializes in creating innovative software solutions

• Works with clients from various industries

• Known for high-quality and reliable products

• Has a strong team of experienced developers

• Provides excellent customer support
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Q1. What is your weakness
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Q2. What is pn junction diode
Ans. 
A pn junction diode is a semiconductor device that allows current to flow in one direction only.
• Consists of p-type and n-type semiconductor materials

• When forward biased, allows current to flow easily

• When reverse biased, blocks current flow
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DSA Based - Graph, Trees

Q1. Trie Implementation
Ans. 
Trie is a tree data structure used for efficient retrieval of key-value pairs.
• Trie is also known as prefix tree.

• Each node in a trie represents a single character of a key.

• Trie is commonly used in autocomplete and spell checking algorithms.

• Example: Inserting 'apple' and 'app' into a trie would result in a structure where 'app' is a prefix of 'apple'.
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Q2. LRU Implementation
Ans. 
LRU (Least Recently Used) is a cache eviction policy that removes the least recently used items first.
• LRU cache stores key-value pairs with a maximum capacity.

• When the cache is full, the least recently used item is removed to make space for new items.

• Each time a key is accessed, it is moved to the front of the cache to indicate it was recently used.
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Aptitude duration One hours
Level moderate

Coding Test Duration 3 hours
Level moderate to hard