When a program class implements an interface, it must provide behavior for A) two methods defined in that interface B) any methods in a class C) only certain methods in that interface D) all methods defined in that interface

When a program class implements an interface, it must provide behavior for A) two methods defined in that interface
B) any methods in a class
C) only certain methods in that interface
D) all methods defined in that interface
by

1 Answer

Answer :

D) all methods defined in that interface
by

Related questions

An _____ is a contract between a class and the outside world. When a class implements an interface, it promises to provide the behavior published by that ______: a) Object b) Interface c) Package d) None of These

Description : An _____ is a contract between a class and the outside world. When a class implements an interface, it promises to provide the behavior published by that ______: a) Object b) Interface c) Package d) None of These

Last Answer : b) Interface

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

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

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.

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.

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.

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.

Which of the following is/are correct with reference to Abstract class and interface ? (a) A class can inherit only one Abstract class but may inherit several interfaces. (b) An Abstract class can provide complete and default code but an interface has no code. Codes : (A) (a) is true (B) (b) is true (C) Both (a) and (b) are true (D) Neither (a) nor (b) is true

Description : Which of the following is/are correct with reference to Abstract class and interface ? (a) A class can inherit only one Abstract class but may inherit several interfaces. (b) An Abstract class can provide complete and default ... true (C) Both (a) and (b) are true (D) Neither (a) nor (b) is true

Last Answer : Answer: C

State true or false for Java Program. i) All class variables are instance variables ii) All protected methods are friendly methods A) i-false, ii-false B) i-false, ii-true

Description : State true or false for Java Program. i) All class variables are instance variables ii) All protected methods are friendly methods A) i-false, ii-false B) i-false, ii-true

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

...................... of a remotely accessible object must implement ................ A) all methods, RemoteException B) class, RemoteException C) class, RemoteInterface D) all methods, RemoteInterface

Description : ...................... of a remotely accessible object must implement ................ A) all methods, RemoteException B) class, RemoteException C) class, RemoteInterface D) all methods, RemoteInterface

Last Answer : C) class, RemoteInterface

Verification: (A) refers to the set of activities that ensure that software correctly implements a specific function. (B) gives answer to the question - Are we building the product right ? (C) requires execution of software (D) both (A) and (B)

Description : Verification: (A) refers to the set of activities that ensure that software correctly implements a specific function. (B) gives answer to the question - Are we building the product right ? (C) requires execution of software (D) both (A) and (B)

Last Answer : (D) both (A) and (B)

A scheduling Algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (lowest priority). The scheduler re-evaluates the process priority for every 'T' time units and decides next process to be scheduled. If the process have no I/O operations and all arrive at time zero, then the scheduler implements .............. criteria. (A) Priority scheduling (B) Round Robin Scheduling (C) Shortest Job First (D) FCFS

Description : A scheduling Algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (lowest priority). The scheduler re-evaluates the process priority for every 'T' time ... (A) Priority scheduling (B) Round Robin Scheduling (C) Shortest Job First (D) FCFS

Last Answer : (B) Round Robin Scheduling

In Java, when we implement an interface method, it must be declared as: (A) Private (B) Protected (C) Public (D) Friend

Description : In Java, when we implement an interface method, it must be declared as: (A) Private (B) Protected (C) Public (D) Friend

Last Answer : (C) Public

Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or all hosts. ii) The class A network 128.0.0.0 is defined as the loopback network. A) i only B) ii only C) Both A and B D) None of the above

Description : Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or all hosts. ii) The class A network 128.0.0.0 is defined as the loopback network. A) i only B) ii only C) Both A and B D) None of the above

Last Answer : A) i only

A variable is defined within a block in a body of a function. Which of the following are true? A) It is visible throughout the function. B) It is visible from the point of definition to the end of the program. C) It is visible from the point of definition to the end of the block. D) It is visible throughout the block.

Description : A variable is defined within a block in a body of a function. Which of the following are true? A) It is visible throughout the function. B) It is visible from the point of definition to the end ... visible from the point of definition to the end of the block. D) It is visible throughout the block.

Last Answer : D) It is visible throughout the block.

If S1 is total number of modules defined in the program architecture, S3 is the number of modules whose correct function depends on prior processing then the number of modules not dependent on prior processing is: (A) 1 + S3/S1 (B) 1 - S3/S1 (C) 1 + S1/S3 (D) 1 - S1/S3

Description : If S1 is total number of modules defined in the program architecture, S3 is the number of modules whose correct function depends on prior processing then the number of modules not dependent on prior processing is: (A) 1 + S3/S1 (B) 1 - S3/S1 (C) 1 + S1/S3 (D) 1 - S1/S3

Last Answer : (B) 1 - S3/S1

When a function is defined inside a class, this function is called …………. A) Inside function B) Class function C) Inline function D) Interior function

Description : When a function is defined inside a class, this function is called …………. A) Inside function B) Class function C) Inline function D) Interior function

Last Answer : C) Inline function

Differential lock offers advantage of A. Better drawbar pull when drive wheel are under different conditions B. Easier to plant in straight rows C. Reduces stearing effort and side draft when operating with certain implements D. All of the above

Description : Differential lock offers advantage of A. Better drawbar pull when drive wheel are under different conditions B. Easier to plant in straight rows C. Reduces stearing effort and side draft when operating with certain implements D. All of the above

Last Answer : D. All of the above

Which of the following are the functions of operating system? i) recovering from errors ii) facilitating input/output iii) facilitating parallel operation iv) sharing hardware among users v) implementing user interface A) i, ii, ii, and v only B) i, ii, iii, and iv only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Description : Which of the following are the functions of operating system? i) recovering from errors ii) facilitating input/output iii) facilitating parallel operation iv) sharing hardware among users v) implementing user interface A) i, ii, ... only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Last Answer : D) All i, ii, iii, iv and v

Which of the following methods belong to the string class? A) length( ) B) compare To ( ) C) equals ( ) D) All of them

Description : Which of the following methods belong to the string class? A) length( ) B) compare To ( ) C) equals ( ) D) All of them

Last Answer : D) All of them

Which of the following methods belong to the string class? A) length( ) B) compare To ( ) C) equals ( ) D) All of them

Description : Which of the following methods belong to the string class? A) length( ) B) compare To ( ) C) equals ( ) D) All of them

Last Answer : D) All of them

When the inheritance is private, the private methods in base class are.................. in the derived class (in C++). (A) inaccessible (B) accessible (C) protected (D) public

Description : When the inheritance is private, the private methods in base class are.................. in the derived class (in C++). (A) inaccessible (B) accessible (C) protected (D) public

Last Answer : (A) inaccessible

Which of the following, in C++, is inherited in a derived class from base class ? (A) constructor (B) destructor (C) data members (D) virtual methods

Description : Which of the following, in C++, is inherited in a derived class from base class ? (A) constructor (B) destructor (C) data members (D) virtual methods

Last Answer : (C) data members

In Unix operating system, special files are used to : (A) buffer data received in its input from where a process reads (B) provide a mechanism to map physical device to file names (C) store list of file names plus pointers associated with i-nodes (D) store information entered by a user application program or utility program

Description : In Unix operating system, special files are used to : (A) buffer data received in its input from where a process reads (B) provide a mechanism to map physical device to file names (C ... pointers associated with i-nodes (D) store information entered by a user application program or utility program

Last Answer : (B) provide a mechanism to map physical device to file names 

Which of the following is true about the static member variable in C++. i) It is initialized to zero when the first object of its class is created. Other initialization is also permitted. ii) It is visible only within the class, but its lifetime is the entire program. A) i-True, ii-True B) ii-False, ii-True C) i-True, ii-False D) i-False, iii-False

Description : Which of the following is true about the static member variable in C++. i) It is initialized to zero when the first object of its class is created. Other initialization is also permitted. ii) It is visible only within ... , ii-True B) ii-False, ii-True C) i-True, ii-False D) i-False, iii-False

Last Answer : B) ii-False, ii-True

The …………….. is code embedded in some legitimate program that is set to “explode” when certain conditions are met. A) Trap doors B) Trojan horse C) Logic Bomb

Description : The …………….. is code embedded in some legitimate program that is set to “explode” when certain conditions are met. A) Trap doors B) Trojan horse C) Logic Bomb

Last Answer : C) Logic Bomb

What's a cool name for a computer program that simulates a toy train that implements a computer?

Description : What's a cool name for a computer program that simulates a toy train that implements a computer?

Last Answer : What about BitTrain? No, too dorky.

What DoD instruction implements the DoD CUI program?

Description : What DoD instruction implements the DoD CUI program?

Last Answer : DoDI 5200.48, Controlled Unclassified Information

Indus Valley Civilisation There was a sharp class division at Harappa and Mohenjo-Daro. This is clear from the _____. A. Indus seals excavated B. Religious beliefs of the Harappans C. Tools and implements used by the Harappans D. Different types of dwellings excavated

Description : Indus Valley Civilisation There was a sharp class division at Harappa and Mohenjo-Daro. This is clear from the _____. A. Indus seals excavated B. Religious beliefs of the Harappans C. Tools and implements used by the Harappans D. Different types of dwellings excavated

Last Answer : ANSWER: D

What is an interface? How is it useful?

Description : What is an interface? How is it useful?

Last Answer : A: Interface is like a class that contains declaration of methods and variables without the function definition. It helps in implementing multiple inheritance.

……………. Allows definitions and query language statements to be entered; query results are formatted and displayed. A) Schema Processor B) Query Processor C) Terminal Interface D) None of the above

Description : ……………. Allows definitions and query language statements to be entered; query results are formatted and displayed. A) Schema Processor B) Query Processor C) Terminal Interface D) None of the above

Last Answer : C) Terminal Interface

Which layers of the OSI determines the interface often system with the user? A) Network B) Application C) Data link D) Session

Description : Which layers of the OSI determines the interface often system with the user? A) Network B) Application C) Data link D) Session

Last Answer : B) Application

FDDI stands for A) Fiber Distributed Data Interface B) Fiber Data Distributed Interface C) Fiber Dual Distributed Interface D) Fiber Distributed Data Interface

Description : FDDI stands for A) Fiber Distributed Data Interface B) Fiber Data Distributed Interface C) Fiber Dual Distributed Interface D) Fiber Distributed Data Interface

Last Answer : A) Fiber Distributed Data Interface

The following three golden rules: (i) Place the user in control (ii) Reduce the user’s memory load (iii) Make the interface consistent are for (A) User satisfaction (B) Good interface design (C) Saving system’s resources (D) None of these

Description : The following three golden rules: (i) Place the user in control (ii) Reduce the user’s memory load (iii) Make the interface consistent are for (A) User satisfaction (B) Good interface design (C) Saving system’s resources (D) None of these

Last Answer : (B) Good interface design 

A part of Windows 2000 operating system that is not portable is (A) Device Management (B) Virtual Memory Management (C) Processor Management (D) User Interface

Description : A part of Windows 2000 operating system that is not portable is (A) Device Management (B) Virtual Memory Management (C) Processor Management (D) User Interface

Last Answer : (B) Virtual Memory Management

The Servlet Response interface enables a servlet to formulate a response for a client using the method ............... (A) void log(Exception e, String s) (B) void destroy() (C) int getServerPort() (D) void setContextType(String Type)

Description : The Servlet Response interface enables a servlet to formulate a response for a client using the method ............... (A) void log(Exception e, String s) (B) void destroy() (C) int getServerPort() (D) void setContextType(String Type)

Last Answer : (D) void setContextType(String Type)

Which of the following is not valid with reference to Message Passing Interface (MPI)? (A) MPI can run on any hardware platform (B) The programming model is a distributed memory model. (C) All parallelism is implicit. (D) MPI - Comm - Size returns the total number of MPI processes in specified communication.

Description : Which of the following is not valid with reference to Message Passing Interface (MPI)? (A) MPI can run on any hardware platform (B) The programming model is a distributed memory model. (C) All ... implicit. (D) MPI - Comm - Size returns the total number of MPI processes in specified communication.

Last Answer : (C) All parallelism is implicit.

System.in.read() is being used, the program must specify the .................. clause. A) throws.java.out.IOException B) throws.java.in.IOException C) throws.java.io.IOException D) throws.java.io.InException

Description : System.in.read() is being used, the program must specify the .................. clause. A) throws.java.out.IOException B) throws.java.in.IOException C) throws.java.io.IOException D) throws.java.io.InException

Last Answer : C) throws.java.io.IOException

Which one of the following describes the syntax of prolog program ? I. Rules and facts are terminated by full stop (.) II. Rules and facts are terminated by semicolon (;) III. Variables names must start with upper case alphabets. IV. Variables names must start with lower case alphabets. Codes : (A) I, II (B) III, IV (C) I, III (D) II, IV

Description : Which one of the following describes the syntax of prolog program ? I. Rules and facts are terminated by full stop (.) II. Rules and facts are terminated by semicolon (;) III. Variables names must start with upper case alphabets. ... alphabets. Codes : (A) I, II (B) III, IV (C) I, III (D) II, IV

Last Answer : (C) I, III

Consider the following JAVA program: public class First { public static int CBSE (int x) { if (x < 100) x = CBSE (x +10); return (x - 1); } public static void main (String[] args){ System.out.print(First.CBSE(60)); } } What does this program print? (1) 59 (2) 95 (3) 69 (4) 99

Description : Consider the following JAVA program: public class First { public static int CBSE (int x) { if (x < 100) x = CBSE (x +10); return (x - 1); } public static void main (String[] args){ System.out.print(First.CBSE(60)); } } What does this program print? (1) 59 (2) 95 (3) 69 (4) 99

Last Answer : (2) 95 

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

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

State true or false. i) Jpanel is a class included in awt package. ii) Anonymous classes are mostly used for event handling. iii) Names of anonymous classes must be unique iv) JOptionPane is an inner class A) i-false, ii-false, iii-true, iv-true B) i-true, ii-false, iii-true, iv-false C) i-false, ii-true, iii-false, iv-false D) i-true, ii-false, iii-false, iv-true

Description : State true or false. i) Jpanel is a class included in awt package. ii) Anonymous classes are mostly used for event handling. iii) Names of anonymous classes must be unique iv) JOptionPane is an inner class A) i-false ... ) i-false, ii-true, iii-false, iv-false D) i-true, ii-false, iii-false, iv-true

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

Which of the following statements is correct? (A) Every class containing abstract method must not be declared abstract. (B) Abstract class cannot be directly initiated with ‘new’ operator. (C) Abstract class cannot be initiated. (D) Abstract class contains definition of implementation.

Description : Which of the following statements is correct? (A) Every class containing abstract method must not be declared abstract. (B) Abstract class cannot be directly initiated with ‘new’ operator. (C) Abstract class cannot be initiated. (D) Abstract class contains definition of implementation.

Last Answer : Answer: B,C

A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following statement is correct? (A) OS maintains only scheduling and accounting information for each thread. (B) OS maintains only CPU registers for each thread. (C) OS does not maintain a separate stack for each thread. (D) OS does not maintain virtual memory state for each thread.

Description : A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following ... separate stack for each thread. (D) OS does not maintain virtual memory state for each thread.

Last Answer : (B) OS maintains only CPU registers for each thread.

By an external entity we mean a A) Unit outside the system being designed which can be controlled by an analyst. B) Unit outside the system whose behavior is independent of the system being designed C) A unit external to the system being designed D) A unit which is not part of a DFD

Description : By an external entity we mean a A) Unit outside the system being designed which can be controlled by an analyst. B) Unit outside the system whose behavior is independent of the system being designed C) A unit external to the system being designed D) A unit which is not part of a DFD

Last Answer : C) A unit external to the system being designed

Methods can be overloaded with a difference only in the type of the return value .. A) Not supported B) False C) True D) None of the above

Description : Methods can be overloaded with a difference only in the type of the return value .. A) Not supported B) False C) True D) None of the above

Last Answer : B) False

Which of the following statements concerning Object-Oriented databases is FALSE? (A) Objects in an object-oriented database contain not only data but also methods for processing the data. (B) Object-oriented databases store computational instructions in the same place as the data. (C) Object-oriented databases are more adapt at handling structures (analytical) data than relational databases. (D) Object-oriented databases store more types of data than relational databases and access that data faster.

Description : Which of the following statements concerning Object-Oriented databases is FALSE? (A) Objects in an object-oriented database contain not only data but also methods for processing the data. (B ... Object-oriented databases store more types of data than relational databases and access that data faster.

Last Answer : (C) Object-oriented databases are more adapt at handling structures (analytical) data than relational databases.

Linux question on screen layout and behavior - how flexible is Ubuntu's standard interface?

Description : Linux question on screen layout and behavior - how flexible is Ubuntu's standard interface?

Last Answer : answer:I know you can do 2] because I've done it so long ago now that I can't remember how, but I would have googled something like linux move taskbar to bottom - and I recall that it was ... the layout more familiar, so there are a lot of forum posts along those lines. Not so sure about 1].

What si the difference between interface and abstractclass Select Answer:  1. interface contain only methods  2. we can't declare a variable for interface  3. interface contain only events  4. None  5. All

Description : What si the difference between interface and abstractclass Select Answer:  1. interface contain only methods  2. we can't declare a variable for interface  3. interface contain only events  4. None  5. All

Last Answer : Ans : 2 The only Difference between Interface and Abstract class is we can declare a variable in abstract class but we can't declare in variable interface

The following protocols and system are commonly used to provide various degrees of security services in computer network. i) IP filtering ii) Reverse Address Translation iii) IP security Architecture (IPsec) iv) Firewalls v) Socks A) i, ii, iii and iv only B) i, iii, iv and v only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Description : The following protocols and system are commonly used to provide various degrees of security services in computer network. i) IP filtering ii) Reverse Address Translation iii) IP security Architecture (IPsec) iv) Firewalls v) Socks ... only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Last Answer : B) i, iii, iv and v only

Names of some of the Operating Systems are given below: (a) MS-DOS (b) XENIX (c) OS/2 In the above list, following operating systems didn’t provide multiuser facility. (1) (a) only (2) (a) and (b) only (3) (b) and (C) only (4) (a), (b) and (c)

Description : Names of some of the Operating Systems are given below: (a) MS-DOS (b) XENIX (c) OS/2 In the above list, following operating systems didn’t provide multiuser facility. (1) (a) only (2) (a) and (b) only (3) (b) and (C) only (4) (a), (b) and (c) 

Last Answer : Answer: Marks to all

Which of the following operation is used if we are interested in only certain columns of a table? (A) PROJECTION (B) SELECTION (C) UNION (D) JOIN

Description : Which of the following operation is used if we are interested in only certain columns of a table? (A) PROJECTION (B) SELECTION (C) UNION (D) JOIN

Last Answer : (A) PROJECTION