Java Knowledge Challenge

Froggy Jumps

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About this activity

Test your Java knowledge.

Created by

Prerana Sherla

India

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Froggy Jumps Java Knowledge ChallengeOnline version Test your Java knowledge. by Prerana Sherla 1 What does JVM stand for? a Java Vendor Machine b Java Virtual Machine c Java Visible Module 2 Which method signature is the entry point of a Java program? a public void start(String[] args) b public static void main(String[] args) c void main() 3 Which keyword is used to create a subclass? a inherits b extends c implements 4 Which collection guarantees insertion order? a HashSet b ArrayList c TreeSet 5 What is garbage collection in Java? a Automatic memory management by the JVM b Manual memory management c Compile-time optimization 6 Which keyword marks a class that cannot be instantiated directly? a abstract b static c final 7 Which letter is commonly used as a generic type parameter in examples? a Z b X c T 8 Which exception is a checked exception in Java? a RuntimeException b IOException c NullPointerException 9 Which keyword begins an exception-handling block? a try b throw c catch 10 Which construct ensures only one thread accesses a block at a time? a synchronized b threadpool c volatile

Froggy Jumps

Java Knowledge ChallengeOnline version

Test your Java knowledge.

by Prerana Sherla

What does JVM stand for?

Java Vendor Machine

Java Virtual Machine

Java Visible Module

Which method signature is the entry point of a Java program?

public void start(String[] args)

public static void main(String[] args)

void main()

Which keyword is used to create a subclass?

inherits

extends

implements

Which collection guarantees insertion order?

HashSet

ArrayList

TreeSet

What is garbage collection in Java?

Automatic memory management by the JVM

Manual memory management

Compile-time optimization

Which keyword marks a class that cannot be instantiated directly?

abstract

static

final

Which letter is commonly used as a generic type parameter in examples?

Which exception is a checked exception in Java?

RuntimeException

IOException

NullPointerException

Which keyword begins an exception-handling block?

try

throw

catch

Which construct ensures only one thread accesses a block at a time?

synchronized

threadpool

volatile

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Java Knowledge Challenge

Froggy Jumps

About this activity

Created by

Download the paper version to play

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Froggy Jumps

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Froggy Jumps

Java Knowledge ChallengeOnline version

by Prerana Sherla

What does JVM stand for?

Which method signature is the entry point of a Java program?

Which keyword is used to create a subclass?

Which collection guarantees insertion order?

What is garbage collection in Java?

Which keyword marks a class that cannot be instantiated directly?

Which letter is commonly used as a generic type parameter in examples?

Which exception is a checked exception in Java?

Which keyword begins an exception-handling block?

Which construct ensures only one thread accesses a block at a time?

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