Ultimate Quiz On Java Skills! Trivia

2.

The package __________ is automatically imported in every java program.

Explanation
In every Java program, the package "java.lang" is automatically imported. This package contains fundamental classes and interfaces that are essential for any Java program to run. The wildcard character "*" indicates that all classes and interfaces within the "java.lang" package are imported. Therefore, the correct answer is "java.lang, java.lang.*, java.lang.*".

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8

3.

How will you describe Java?

Programming Language
Platform
Both Programming Language and Platform
Abstract Machine

Correct Answer

A. Both Programming Language and Platform

Explanation

Java acts both as a programming language as well as a platform for several applications.

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4.

Java Is Structured Programming Language.

True
False

Correct Answer

A. False

Explanation

Java is Object Oriented Programming Language.

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0

5.

What will be the output of the following code segment?String one="one";String two="two";String One=new String(one);String Two=two;if(one==One)System.out.println("Java is fun!");if(one.equals(One)==true)System.out.println("Programming needs practice.");if(one==Two)System.out.println("OOP is the way!");if(two.equals(Two)==true)System.out.println("Explore the world of Java.");

Java is fun! Programming needs practice.
Java is fun! Programming needs practice. Explore the world of Java.
Programming needs practice Explore the world of Java.
Programming needs practice. OOP is the way! Explore the world of Java.
Java is fun! Programming needs practice. OOP is the way! Explore the world of Java.

Correct Answer

A. Programming needs practice Explore the world of Java.

Explanation

== operator compares the memory locations, which is never same for two different objects whereas equals() compares the contents.

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5

6.

What will be the output of the following code segment?int a = 4, b = 8, c = -5; System.out.println(a/b+"\n"+(++cb--)+" "+a--b/c--);

0 -32 -7
0.5 32 6
0 40 -7
0.5 -32 -7
0 -32 -7

Correct Answer

A. 0 -32 -7

Explanation

The code segment first performs the division operation a/b, which results in 0. Then, it concatenates the result with the value of (++c*b--) and (a--*b/c--).

The expression (++c*b--) increments the value of c by 1 and multiplies it by b, which is 8. The post-decrement operator (b--) is then applied, reducing the value of b by 1. The result of this expression is -32.

The expression (a--*b/c--) multiplies the value of a (4) by b (7) and divides it by c (-6). The post-decrement operator (a--) is then applied, reducing the value of a by 1. The result of this expression is -7.

Therefore, the output of the code segment is 0 -32 -7.

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3

7.

What will be the output of the following code segment?class Number{int a;public static void main(String ar[]){ a=10;int b=20;a=a+b;b=a-b;a=a-b;System.out.println("a = "+a);System.out.println("b = "+b);}}

A = 20 b = 10
A = 10 b = 20
A = 30 b = 10
A = 10 b = 30
Compile-time error

Correct Answer

A. Compile-time error

Explanation

Non-static variable cannot be referenced from a static context. a is a non-static variable, it cannot be referenced from within main() which is static.

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8.

What will the function Math.ceil(-99.9) return?

-99
99.0
100.0
-99.0
-100.0

Correct Answer

A. -99.0

Explanation

ceil() returns the smallest whole number less than or equal to the given argument. It returns a double type value.

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5

9.

What will the following code segment print?int i; for(i=1;i<=4;i=i+3); System.out.println(i);

1 4
14
4
7
Nothing. It will give compile-time error.

Correct Answer

A. 7

Explanation

The value will be printed only when the loop is terminated. Since it's a one-line loop so it won't repeat the printing statement. Loop terminated when i becomes 7. So 7 will be printed.

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14

10.

Which of the following are legal identifiers in Java?

1abc
Abc_1
OneAbc
Final
$while

Correct Answer(s)

A. Abc_1
A. OneAbc
A. $while

Explanation

A is wrong as it starts with a digit. D is wrong as it is a keyword. Identifiers in Java must start with a letter, Dollar sign($) or an Underscore(_) and must not be a keyword.

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6

Ultimate Quiz On Java Skills! Trivia

Which of the following group consists of only Object-Oriented languages?

Quiz Preview

The package __________ is automatically imported in every java program.

How will you describe Java?

Java Is Structured Programming Language.

What will be the output of the following code segment?int a = 4, b = 8, c = -5; System.out.println(a/b+"\n"+(++cb--)+" "+a--b/c--);

What will be the output of the following code segment?class Number{int a;public static void main(String ar[]){ a=10;int b=20;a=a+b;b=a-b;a=a-b;System.out.println("a = "+a);System.out.println("b = "+b);}}

What will the function Math.ceil(-99.9) return?

What will the following code segment print?int i; for(i=1;i<=4;i=i+3); System.out.println(i);

Which of the following are legal identifiers in Java?

Ultimate Quiz On Java Skills! Trivia

Which of the following group consists of only Object-Oriented languages?

Quiz Preview

The package __________ is automatically imported in every java program.

How will you describe Java?

Java Is Structured Programming Language.

What will be the output of the following code segment?int a = 4, b = 8, c = -5; System.out.println(a/b+"\n"+(++c*b--)+" "+a--*b/c--);

What will be the output of the following code segment?class Number{int a;public static void main(String ar[]){ a=10;int b=20;a=a+b;b=a-b;a=a-b;System.out.println("a = "+a);System.out.println("b = "+b);}}

What will the function Math.ceil(-99.9) return?

What will the following code segment print?int i; for(i=1;i<=4;i=i+3); System.out.println(i);

Which of the following are legal identifiers in Java?

What will be the output of the following code segment?int a = 4, b = 8, c = -5; System.out.println(a/b+"\n"+(++cb--)+" "+a--b/c--);