IEEE Tech Event Contest
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A class cannot be declared ......
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Public
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Private
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Default
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The 'IEEE Tech Event Contest' quiz tests knowledge on Java programming, focusing on data types, visibility modifiers, and common compile-time and runtime errors. It's designed to enhance understanding of Java's fundamental concepts and error management.
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- 2.
Following code will result in: class A { public static void main(String [] args) { B b = new A(); } } class B extends A {}
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Compile Error
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Runtime Error
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No Error
Correct Answer
A. Compile ErrorExplanation
The given code will result in a compile error. This is because the line "B b = new A();" is trying to create an object of class A and assign it to a variable of class B. Since class B is a subclass of class A, this is not allowed in Java. The object being created must be of the same type as the variable it is being assigned to, or a subclass of that type. Therefore, the code will not compile.Rate this question:
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- 3.
Following code will result in: int a = 3.5;
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Compilation error
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Runtime error
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A will equal 3.5
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A will equal 3
Correct Answer
A. Compilation errorExplanation
The given code will result in a compilation error because the variable "a" is declared as an integer, but it is being assigned a floating-point value (3.5). In Java, you cannot directly assign a floating-point value to an integer variable without explicit casting. Therefore, the code will not compile.Rate this question:
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- 4.
What is the size of a Char in Java?
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1 bit
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4 bit
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8 bit
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16 bit
Correct Answer
A. 16 bitExplanation
In Java, the size of a Char is 16 bits. This means that a Char data type can store Unicode characters ranging from U+0000 to U+FFFF. Unicode characters are represented using the UTF-16 encoding, which requires 16 bits of storage for each character. Therefore, the correct answer is 16 bit.Rate this question:
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- 5.
A class can be transient
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True
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False
Correct Answer
A. FalseExplanation
A class cannot be transient. The transient keyword in programming is used to indicate that a variable should not be serialized, meaning it will not be saved and restored when the object is persisted or transferred. However, the transient keyword cannot be applied to a class itself. It can only be used to mark individual variables within a class as transient. Therefore, the statement "A class can be transient" is false.Rate this question:
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- 6.
Following code will result in: int a = 9/0;
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Compilation error: Divisions must be in a try block.
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Compilation error: DivideByZeroException
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Runtime Exception
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No Error: a is Null
Correct Answer
A. Runtime ExceptionExplanation
The code will result in a runtime exception because it is trying to divide 9 by 0, which is not allowed in mathematics. This will throw a runtime exception called "ArithmeticException" or "DivideByZeroException" in most programming languages.Rate this question:
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Quiz Review Timeline (Updated): Mar 20, 2023 +
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Current Version
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Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Mar 26, 2012Quiz Created by
Ahmdrmdn
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