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GK One-Line Question & Answer

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Computer Fundamentals → Introduction to Computer 40

Which image format supports transparency?
PNG
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ZIP file format is used for?
File archiving and compression
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Which Linux command displays current directory?
pwd
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Which Linux command changes directory?
cd
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Which Linux command creates a directory?
mkdir
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Which Linux command deletes a file?
rm
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Which Linux command copies a file?
cp
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Which Linux command moves or renames a file?
mv
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chmod in Linux is used to?
Change file permissions
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Which Linux command displays running processes?
ps
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grep command in Linux is used to?
Search text patterns in files
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| (pipe) in Linux connects?
Commands — output of one as input of next
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Which Linux command shows disk usage?
df
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sudo in Linux means?
Super user do
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cron in Linux is used for?
Scheduling recurring tasks
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Which Windows command shows all running processes?
tasklist
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ping command tests?
Network connectivity and latency
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tracert (Windows) / traceroute (Linux) shows?
Path packets take to destination
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nslookup is used for?
DNS lookup queries
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netstat shows?
Active network connections and ports
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Which programming language is primarily used for iOS app development?
Swift
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Android apps are primarily developed in?
Java and Kotlin
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Which company developed Kotlin language?
JetBrains
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C# is primarily used with which framework?
.NET (Microsoft)
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PHP is primarily used for?
Server-side web development
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React.js is a?
Database ORM
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Node.js enables?
JavaScript on server-side
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Django is a framework for?
Python
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Spring is a framework for?
Java
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Which version control system is distributed?
Git
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A constructor in OOP?
Initializes objects when created
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Destructor in OOP?
Releases resources when object is destroyed
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Abstract class in OOP?
Cannot be instantiated directly
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Interface in OOP defines?
Only method signatures (contract)
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Which design pattern creates only one instance of a class?
Singleton
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MVC stands for in software design?
Model-View-Controller
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REST vs SOAP: REST is?
Lightweight and uses multiple formats
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Microservices architecture?
Application as collection of small independent services
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CI/CD stands for?
Continuous Integration/Continuous Deployment
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Which format is used for configuration files in DevOps?
YAML and JSON
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