MCQ, Questions & Answers For Preparation (Updated 2021) – Recruitment, Syllabus, Result, Admit Card

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For pre-employment screening stage, Java online test is the most essential test. Java Online Test evaluates the knowledge of candidates in java programming language. For best preparation of aspirants, we have updated here Java practice Test Questions and Answers in MCQ format updated as per 2021.

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Java Online Test

Java Online Test MCQ Updated 2021:

Q 1: Which statement is true regarding an object?

1. An object is what classes instantiated are from
2. An object is an instance of a class
3. An object is a variable
4. An object is a reference to an attribute
5. An object is not an instance of a class.

Ans: 2

Q 2: Which of the following does not belong: If a class inherits from some other class, it should

1. Make use of the parent class’s capabilities
2. Over-ride or add the minimum to accomplish the derived class’ purpose
3. Over-ride all the methods of its parent class
4. Make sure the result “IS-A-KIND-OF” its base class
5. Make sure the result “contains” its base class.

Ans: 3

Q 3: Object-oriented inheritance models the

1. “is a kind of” relationship
2. “has a” relationship
3. “want to be” relationship
4. inheritance does not describe any kind of relationship between classes
5. “contains” of relationship.

Ans: 1

Q 4: In Java, declaring a class abstract is useful

1. To prevent developers from further extending the class
2. When it doesn’t make sense to have objects of that class
3. When default implementations of some methods are not desirable
4. To force developers to extend the class not to use its capabilities
5. When it makes sense to have objects of that class.

Ans: 2

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Q 5: Which of the following is a member of the java.lang package?

1. List
2. Queue
3. Math
4. Stack
5. Process

Ans: 2

Q 6: Which data type value is returned by all transcendental math functions?

1. int
2. float
3. double
4. long

Ans: 3

Q 7: What is the range of data type short in Java?

1. -128 to 127
2. -32768 to 32767
3. -2147483648 to 2147483647
4. None of the mentioned

Ans: 2

 Q 8: What is the range of data type byte in Java?

1. -128 to 127
2. -32768 to 32767
3. -2147483648 to 2147483647
4. None of the mentioned

Ans: 1

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Q 9: An expression involving byte, int, and literal numbers is promoted to which of these?

1. Int
2. long
3. byte
4. float

Ans: 1

Q 10: Which of these literals can be contained in a data type float variable?

1. 7e-308
2. 4e-038
3. 7e+308
4. 4e-050

Ans: 2

Q 11: Which data type value is returned by all transcendental math functions?

1. int
2. float
3. double
4. long

Ans: 3

Q 12: What is the numerical range of a char in Java?

1. -128 to 127
2. 0 to 256
3. 0 to 32767
4. 0 to 65535

Ans: 4

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Q 13: Which of these coding types is used for data type characters in Java?

1. ASCII
2. ISO-LATIN-1
3. UNICODE
4. None of the mentioned

Ans 3

Q 14: Which of these values can a boolean variable contain?

1. True & False
2. 0 & 1
3. Any integer value.
4. Both a & b

Ans: 1

Q 15: Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?

1. ASCII
2. ISO-LATIN-1
3. None of the mentioned
4. Both a & b

Ans: 4

Q 16: Which one is a valid declaration of a boolean?

1. boolean b1 = 1;
2. boolean b2 = ‘false’;
3. boolean b3 = false;
4. boolean b4 = ‘true’

Ans: 3

Q 17: Which of these class is superclass of String and StringBuffer class?

1. util
2. lang
3. Array List
4. None of the mentioned

Ans: 2

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Q 18: Which of these operators can be used to concatenate two or more String objects?

1. +
2. +=
3. &
4. ||

Q 19: Which of these methods of class String is used to obtain length of String object?

1. get()
2. Sizeof()
3. lengthof()
4. length()

Ans: 4

Q 20: Which of these methods of class String is used to extract a single character from a String object?

1. CHARAT()
2. charat()
3. charAt()
4. ChatAt()

Ans: 3

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Online java coding test has designed for especially for both the contenders these are fresher’s as well as for experienced. Java is a simplified object-oriented programming language which is used for designed programs. Aspirants seeking jobs related to java and those applicants want promotion in the field of java must go through java MCQ online test.

There are so many sites which are serving by providing java online test practice questions. Some, we have given in underneath of this page. Students should scroll down this page for getting complete info.

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Java Online Mock Test 2021:

Java Online Test Series will develop programming skills and enhance speed of solving online core java test questions. Java online test or Java Mock Test plays an important role for all those students who are preparing for appearing in any competition exam. Java Quiz Questions providing on this page focused on every topic of Java language.

Students should take Java Online Quiz for their systematic preparation. Those contenders who have desire to sharpen their skills in java language must take core java test online. Through advanced java Online Quiz, aspirants will get ready for Java Interviews, online test for java, examinations and certifications.

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