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Quiz based on Digital Principles and Computer Organization

1) Base of hexadecimal number system? Answer : 16 2) Universal gate in digital logic? Answer : NAND 3) Memory type that is non-volatile? Answer : ROM 4) Basic building block of digital circuits? Answer : Gate 5) Device used for data storage in sequential circuits? Answer : Flip-flop 6) Architecture with shared memory for instructions and data? Answer : von Neumann 7) The smallest unit of data in computing? Answer : Bit 8) Unit that performs arithmetic operations in a CPU? Answer : ALU 9) Memory faster than main memory but smaller in size? Answer : Cache 10) System cycle that includes fetch, decode, and execute? Answer : Instruction 11) Type of circuit where output depends on present input only? Answer : Combinational 12) The binary equivalent of decimal 10? Answer : 1010 13) Memory used for high-speed temporary storage in a CPU? Answer : Register 14) Method of representing negative numbers in binary? Answer : Two's complement 15) Gate that inverts its input signal? Answer : NOT 16)...

Java Important questions - 3

1) Name the methods of Object class?
clone() - This method helps to create and return a copy of the object.
equals() - This method helps to compare.
finalize () - called by the garbage collector on an object.
getclass() - It helps to return the runtime class of an object.
hashcode() - Helps to return a hash code value for the object
toString() - helps to return a string representation of the object.
notify(), notifyAll() and wait() - It helps to synchronize the activities of independently running threads in a program.

2) What are constructors in java? What are the types of constructors?
          In java, the constructor is a block of code used to initialize an object. The constructor is a method which has the same name as class name. There are two types of constructors:
1. Default constructor :
          A constructor that has no parameters is known as default constructor. If we don't define a constructor in a class, the compiler creates a default constructor for the class. 
2. Parameterized constructor :
          A constructor that has known parameter is a parameterized constructor. If we want to initialize field of the class with your own values,then use a parameterized constructor.

3) What is meant by local variable and Instance variable?
          Local variables are defined in the method and scope of the variables that have existed inside the method itself.
          An Instance variable is defined inside the class and outside the method and scope of the variables exist throughout the class.

4) What is the difference between static and dynamic loading ?
          Static loading : Classes are loaded statically with operator 'new'.
          Dynamic loading : It is the technique for programmatically invoking the functions of a class loader at runtime. The syntax is Class.forName(Test className);

5) What is an Anonymous class?
          The class defined without a name is known as an anonymous class.
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