71. Interfaces helps in which type of inheritance ?
A. Multiple inheritance
B. Multilevel inheritance
C. Hierarchical inheritance
D. None of above
✅ The correct answer is option A.
Java concepts and its programming MCQs
72. Object which can store group of other objects is called___________________?
A. Package
B. Wrapper
C. Java object
D. Collection object
✅ The correct answer is option D.
73. Smallest individual unit in java program is known as____________________?
A. token
B. string
C. literal
D. operator
✅ The correct answer is option A.
74. In Java, the word true is ___________________?
A. A Boolean literal
B. A Java keyword
C. Same as value 0
D. Same as value 1
✅ The correct answer is option A.
75. Process of creating exact copy of the existing object is called_______________?
A. overloading
B. overriding
C. cloning
D. coping
✅ The correct answer is option C.
76. Which of the following below are valid isolation levels in J2EE ?
A. TRANSACTION_READ_UNCOMMITTED
B. TRANSACTION_SERIALIZABLE
C. Only A
D. Both A and B
✅ The correct answer is option D.
77. Which method can’t be overidden ?
A. println
B. final
C. super
D. static
✅ The correct answer is option B.
78. Program which executes applet is known as________________?
A. JVM
B. virtual machine
C. applet engine
D. None of above
✅ The correct answer is option C.
79. Hot java is_______________?
A. Web browser
B. Java environment
C. System software
D. IDE
✅ The correct answer is option A.
80. x=x+1 is equivalent to _________________?
A. x++
B. ++x
C. x=x-1
D. None of these
✅ The correct answer is option A.