Ultimate Quiz On Java Skills! Trivia
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Questions and Answers
- 1.
How will you describe Java?
- A.
Programming Language
- B.
Platform
- C.
Both Programming Language and Platform
- D.
Abstract Machine
Correct Answer
C. Both Programming Language and PlatformExplanation
Java acts both as a programming language as well as a platform for several applications.Rate this question:
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- 2.
Java Is Structured Programming Language.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Java is Object Oriented Programming Language.Rate this question:
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- 3.
Which of the following are legal identifiers in Java?
- A.
1abc
- B.
Abc_1
- C.
OneAbc
- D.
Final
- E.
$while
Correct Answer(s)
B. Abc_1
C. OneAbc
E. $whileExplanation
A is wrong as it starts with a digit. D is wrong as it is a keyword. Identifiers in Java must start with a letter, Dollar sign($) or an Underscore(_) and must not be a keyword.Rate this question:
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- 4.
The package __________ is automatically imported in every java program.
Correct Answer(s)
java.lang, java.lang.*, java.lang.*;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.*".Rate this question:
- 5.
What will the function Math.ceil(-99.9) return?
- A.
-99
- B.
99.0
- C.
100.0
- D.
-99.0
- E.
-100.0
Correct Answer
D. -99.0Explanation
ceil() returns the smallest whole number less than or equal to the given argument. It returns a double type value.Rate this question:
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- 6.
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.");
- A.
Java is fun! Programming needs practice.
- B.
Java is fun! Programming needs practice. Explore the world of Java.
- C.
Programming needs practice Explore the world of Java.
- D.
Programming needs practice. OOP is the way! Explore the world of Java.
- E.
Java is fun! Programming needs practice. OOP is the way! Explore the world of Java.
Correct Answer
C. 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.Rate this question:
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- 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.
A = 20 b = 10
- B.
A = 10 b = 20
- C.
A = 30 b = 10
- D.
A = 10 b = 30
- E.
Compile-time error
Correct Answer
E. Compile-time errorExplanation
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.Rate this question:
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- 8.
What will the following code segment print?int i; for(i=1;i<=4;i=i+3); System.out.println(i);
- A.
1 4
- B.
14
- C.
4
- D.
7
- E.
Nothing. It will give compile-time error.
Correct Answer
D. 7Explanation
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.Rate this question:
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- 9.
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--);
- A.
0 -32 -7
- B.
0.5 32 6
- C.
0 40 -7
- D.
0.5 -32 -7
- E.
0 -32 -7
Correct Answer
A. 0 -32 -7Explanation
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.Rate this question:
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- 10.
Which of the following group consists of only Object-Oriented languages?
- A.
C,C++,JAVA
- B.
C,JAVA,RUBY
- C.
C++,JAVA,BASIC
- D.
BASIC,FORTRAN,JAVA
- E.
C++,JAVA,C#
Correct Answer
E. C++,JAVA,C#Explanation
The group consisting of C++, JAVA, and C# consists of only Object-Oriented languages. C++ is a general-purpose programming language that supports both procedural and object-oriented programming paradigms. JAVA is a widely used object-oriented programming language known for its platform independence. C# is a modern, general-purpose, object-oriented programming language developed by Microsoft. All three languages have features and syntax that support object-oriented programming concepts such as encapsulation, inheritance, and polymorphism.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Sep 03, 2010Quiz Created by
Maverick_virgo
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