Which of the following is not the java primitive type
A) Byte  
B) Float  
C) Character
D) Long double

1 Answer

Answer :

D) Long double

Related questions

Description : In java, string is a ............. A) primitive data type B) abstract data type C) combination of boolean D) None of the above

Last Answer : B) abstract data type

Description : Name the primitive data-types in java.

Last Answer : A: byte, short, int, long, float, double, char and boolean

Description : Data input is A) an abstract class defined in java.io B) a class we can use to read primitive data types C) an interface that defines methods to open files. D) an interface that defines methods to read primitive data types.

Last Answer : D) an interface that defines methods to read primitive data types.

Description : Data input is A) an abstract class defined in java.io B) a class we can use to read primitive data types C) an interface that defines methods to open files. D) an interface that defines methods to read primitive data types.

Last Answer : D) an interface that defines methods to read primitive data types.

Description : Arrange the following primitive data types in an ascending order of their size: (i) char (ii) byte (iii) double (iv) int

Last Answer : Ans. The sizes of the given data types are as follows char = 2 bytes byte = 1 byte double = 8 bytes int = 4 bytes Arranging them in ascending order gives byte < char < int < double

Description : Which of the following is a valid SQL type? (A) CHARACTER (B) NUMERIC (C) FLOAT (D) All of the above

Last Answer : (D) All of the above

Description : If an integer occupies 4 bytes and a character occupies 1 byte of memory, each element of the following structure would occupy how many bytes ? struct name { int age; char name[30]; }; A) 30 B) 32 C) 34 D) 36

Last Answer : C) 34

Description : A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB

Last Answer : (C) 16 GB

Description : A unix file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contain 10 direct entries and one single, double and triple indirect entry each? (A) 32 GB (B) 64 GB (C) 16 GB (D) 1 GB

Last Answer : (C) 16 GB

Description : What are the default values of the primitive datatypes int and float?

Last Answer : Ans. The default value of int is 0 and the default value of float is 0.0f.

Description : Dining Philosopher's problem is a: (A) Producer-Consumer problem (B) Classical IPC problem (C) Starvation problem (D) Synchronization primitive

Last Answer : (B) Classical IPC problem

Description : Which of the following is not a basic primitive of the Graphics Kernel System(GKS) ? (A) POLYLINE (B) POLYDRAW (C) FILL AREA (D) POLYMARKER

Last Answer : (B) POLYDRAW

Description : The .................. and .................... classes are abstract classes that support reading and writing of byte streams. A) reader, writer B) inputstream, outputstream C) objectinputstream, objectoutputstream D) none

Last Answer : B) inputstream, outputstream

Description : The .................. and .................... classes are abstract classes that support reading and writing of byte streams. A) reader, writer B) inputstream, outputstream C) objectinputstream, objectoutputstream D) none

Last Answer : B) inputstream, outputstream

Description : A byte addressable computer has a memory capacity of 2 m Kbytes and can perform 2 n operations. An instruction involving 3 operands and one operator needs a maximum of (A) 3m bits (B) m + n bits (C) 3m + n bits (D) 3m + n + 30 bits

Last Answer : (D) 3m + n + 30 bits

Description : Four channels are multiplexed using TDM. If each channel sends 100 bytes/second and we multiplex 1 byte per channel, then the bit rate for the link is ............... (A) 400 bps (B) 800 bps (C) 1600 bps (D) 3200 bps

Last Answer : (D) 3200 bps Answer: D Explanation: The multiplexer is shown in the Figure. Each frame carries 1 byte from each channel; the size of each frame, therefore, is 4 bytes, or 32 bits. Because each ... channel, the frame rate must be 100 frames per second. The bit rate is 100 32 = 3200 bps. 

Description : In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is ................ (1) 2 bytes (2) 1 byte (3) 4 bytes (4) 5 bytes

Last Answer : (4) 5 bytes 

Description : Station A uses 32 byte packets to transmit messages to station B using sliding window protocol. The round trip delay between A and B is 40 milli seconds and the bottleneck bandwidth on the path between A and B is 64 kbps. The optimal window size of A is (1) 20 (2) 10 (3) 30 (4) 40

Last Answer : (2) 10

Description : ……………. are not machine instructions and therefore, Java interpreter generates machine code that can be directly executed by the machine that is running the Java program. A) Compiled Instructions B) Compiled code C) byte code D) Java mid code

Last Answer : C) byte code

Description : A software company needs to develop a project that is estimated as 1000 function points and is planning to use JAVA as the programming language whose approximate lines of code per function point is accepted as 50. Considering a=1. ... ? (1) 11.2 months (2) 12.2 months (3) 13.2 months (4) 10.2 months

Last Answer : Generally, any projects are measured in weeks. However, the complex project might take more time depending on the level of object re-use available.

Description : If a variable is declared final, it must include ...................... value. A) integer B) no C) initial D) float

Last Answer : C) initial

Description : Float a[15], what is the size of array? A) 17 B) 14 C) 15 D) 16

Last Answer : 16

Description : Which of the following has compilation error in C ? (A) int n = 32; (B) char ch = 65; (C) float f= (float) 3.2; (D) none of the above

Last Answer : D

Description : In the second type the information written in java after // is ignored by the ....................... A) Interpreter B) Compiler C) Programmer D) All of the above

Last Answer : B) Compiler

Description : The third type of comment is used by a tool called .................. for automatic generation of documentation. A) Java commenting B) Java generator C) Java doc D) Java loc

Last Answer : C) Java doc

Description : In java, ............. can only test for equality, where as ............ can evaluate any type of the Boolean expression. A) switch, if B) if, switch C) if, break D) continue, if

Last Answer : A) switch, if

Description : Which of the following is not a primitive data type: a) String b) Double c) Boolean d) None of The Above

Last Answer : a) String

Description : Double is a ______ data type. (1) primitive (2) user defined (3) system defined (4) local

Last Answer : primitive

Description : What is the default java package?

Last Answer : A: java.lang

Description : Mention other ways in which java handles exceptions.

Last Answer : A: Java can handle exception using the try-catch block, throws keyword and throw keyword.

Description : Why did you write java.util package? (only if you use classes like Scanner or StringTokenizer)

Last Answer : A: To include the functions of the Scanner or StringTokenizer class from the java.util package.

Description : What is significance of import java.io.* in your program?

Last Answer : A: The line imports all the classes of the java.io package into the current program.

Description : What is Inheritance? How is it implemented in Java?

Last Answer : A: The ability of a class to adopt/share the properties (data and functions) completely or partially from another class is called Inheritance. In Java, it is implemented by the use of the keyword, extends.

Description : What is Polymorphism? How is it implemented in Java?

Last Answer : A: It literally means the ability to take ‘more than one forms’. The ability of a method to behave in more than one form is called polymorphism. In Java, it is implemented by method (function) overloading (compile time polymorphism) and method overriding (runtime polymorphism).

Description : What is Data Abstraction? How is it implemented in Java?

Last Answer : A: Act of representing only essential features without including its background details is called Abstraction. Data Abstraction can also be defined as the process of hiding the implementation details and showing ... Java, it is implemented by the use of interfaces or by making the class abstract.

Description : What is Encapsulation? How is it implemented in Java?

Last Answer : A: Binding up of data and associated functions together into a single unit called (class) is called Encapsulation. In Java, it is implemented by the use of a class.

Description : Is Java an Object Oriented language?

Last Answer : A: Yes.

Description : State true or false. i) comparisons precede logical operations in java ii) assignment operations succeed increment operations iii) arithmetic operations succeed comparisons iv) x precede + A) i-true, ii-true, iii-false, ... false, ii-true, iii-false, iv-false D) i-true, ii-false, iii-false, iv-true

Last Answer : A) i-true, ii-true, iii-false, iv-true

Description : Each method in a java class must have a unique name . A) Not necessary B) True C) False D) None of the above

Last Answer : A) Not necessary

Description : The concept of multiple inheritance is implemented in Java by A) extending two or more classes B) extending one class and implementing one or more interfaces C) implementing two or more interfaces D) both B and C

Last Answer : D) both B and C

Description : The concept of multiple inheritance is implemented in Java by A) extending two or more classes B) extending one class and implementing one or more interfaces C) implementing two or more interfaces D) both B and C

Last Answer : D) both B and C

Description : State true or false. i) init() is called after start() in applet ii) applets are used for networking iii) inheritance is a part of Java Foundation Classes iv) final does not prevent inheritance A) i-true, ii- ... C) i-true, ii-true, iii-true, iv-true D) i-true, ii-false, iii-false, iv-false

Last Answer : B) i-false, ii-false, iii-false, iv-false

Description : Match the following. a) Java 1) is a tool for debugging java program b) Javah 2) is a tool for creating C-like header files c) Javap 3) runs java bytecode d) jdb 4) prints java code representation A) a-3, b-2,c-1 B) a-3, b-1, c-4, d-2 C) a-1, b-2, c-3, d-4 D) a-2, b-1, c-3, d-4

Last Answer : B) a-3, b-1, c-4, d-2

Description : State true or false for the following statements in Java. i) Java beans slow down software development process. ii) Java Servlets do not have built in multithreading feature. A) i-false, ii-false B) i-false, ii-true C) i-true, ii-false D) i-true, ii-true

Last Answer : A) i-false, ii-false

Description : ............... package is used by compiler itself. So it does not need to be imported for use. A) java.math B) java.awt C) java.applet D) java.lang

Last Answer : D) java.lang

Description : The class string belongs to ................... package. A) java.awt B) java.lang C) java.applet D) java.string

Last Answer : B) java.lang

Description : JSP embeds in ................ in ...................... A) Servlet, HTML B) HTML, Java C) HTML, Servlet D) Java, HTML

Last Answer : D) Java, HTML

Description : State true or false for Java Program. i) Data members of an interface are by default final ii) An abstract class has implementations of all methods defined inside it. A) i-false, ii-false B) i-false, ii-true C) i-true, ii-false D) i-true, ii-true

Last Answer : C) i-true, ii-false