Why do we have main() function?

Why do we have main() function?
by

1 Answer

Answer :

A: The execution of the program begins from the main() method.
by

Related questions

Which is the main function of transport layer? A) Node to node delivery B) End to end delivery C) Synchronization d) Updating and maintaining routing tables

Description : Which is the main function of transport layer? A) Node to node delivery B) End to end delivery C) Synchronization d) Updating and maintaining routing tables

Last Answer : B) End to end delivery

What is the most appropriate function of Memory Management Unit (MMU) ? (A) It is an associative memory to store TLB (B) It is a technique of supporting multiprogramming by creating dynamic partitions (C) It is a chip to map virtual address to physical address (D) It is an algorithm to allocate and deallocate main memory to a process

Description : What is the most appropriate function of Memory Management Unit (MMU) ? (A) It is an associative memory to store TLB (B) It is a technique of supporting multiprogramming by creating dynamic partitions ... to physical address (D) It is an algorithm to allocate and deallocate main memory to a process 

Last Answer : (C) It is a chip to map virtual address to physical address

State true of false. i) We cannot make the function inline by defining a function outside the class. ii) A member function can be called by using its name inside another member function of the same class, this is known as nesting of member function. A) True, True B) True, False C) False, True D) False, False

Description : State true of false. i) We cannot make the function inline by defining a function outside the class. ii) A member function can be called by using its name inside another member function of the same class, this ... of member function. A) True, True B) True, False C) False, True D) False, False

Last Answer : C) False, True

To accept 100 different values into the array we require A) Loop B) If condition C) Function D) Structure

Description : To accept 100 different values into the array we require A) Loop B) If condition C) Function D) Structure

Last Answer : A) Loop

To shuffle the list(say list1) what function do we use ? a) list1.shuffle () b) shuffle(list1) c) random.shuffle(list1) d) random.shuffleList(list1)

Description : To shuffle the list(say list1) what function do we use ? a) list1.shuffle () b) shuffle(list1) c) random.shuffle(list1) d) random.shuffleList(list1)

Last Answer : c) random.shuffle(list1)

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)

Which of the following is incorrect in C++ ? (A) When we write overloaded function we must code the function for each usage. (B) When we write function template we code the function only once. (C) It is difficult to debug macros (D) Templates are more efficient than macros

Description : Which of the following is incorrect in C++ ? (A) When we write overloaded function we must code the function for each usage. (B) When we write function template we code the function only once. (C) It is difficult to debug macros (D) Templates are more efficient than macros

Last Answer : (D) Templates are more efficient than macros 

Why is the main method static?

Description : Why is the main method static?

Last Answer : A: So that it be available for execution without the need of any object.

Why is the main method public?

Description : Why is the main method public?

Last Answer : A: So that it be accessible to the JVM which begins to execute the program from outside of the class.

Which method will a web browser call on a new applet? A) main method B) destroy method C) execute method D) init method

Description : Which method will a web browser call on a new applet? A) main method B) destroy method C) execute method D) init method

Last Answer : D) init method

What would happen if "String[]args" is not included as argument in the main method. A) No error B) Compilation error C) Program won't run D) Program exit

Description : What would happen if "String[]args" is not included as argument in the main method. A) No error B) Compilation error C) Program won't run D) Program exit

Last Answer : C) Program won't run

main() { Int a=3, b=2, c*d*e; d=&a; e=&b; c=*d+*e; } Which one of the given answers is correct? A) a=4, c-6 B) a=3, c=5 C) a=3, c=6 D) a=3, c=8

Description : main() { Int a=3, b=2, c*d*e; d=&a; e=&b; c=*d+*e; } Which one of the given answers is correct? A) a=4, c-6 B) a=3, c=5 C) a=3, c=6 D) a=3, c=8

Last Answer : B) a=3, c=5

The ……………. Determines when a page should be brought into main memory. A) Fetch policy B) Placement policy C) Replacement policy D) Resident set management

Description : The ……………. Determines when a page should be brought into main memory. A) Fetch policy B) Placement policy C) Replacement policy D) Resident set management

Last Answer : A) Fetch policy

A process that execute only in main memory is referred to as ……………… and that allocated in disk is referred to a ……………. A) virtual memory, true memory B) virtual memory, real memory C) real memory, virtual memory D) imaginary memory, real memory

Description : A process that execute only in main memory is referred to as ……………… and that allocated in disk is referred to a ……………. A) virtual memory, true memory B) virtual memory, real memory C) real memory, virtual memory D) imaginary memory, real memory

Last Answer : C) real memory, virtual memory

………. Involves treating main memory as a resource to be allocated to and shared among a number of active processes. A) Partition management B) Memory management C) Disk management D) All of the above

Description : ………. Involves treating main memory as a resource to be allocated to and shared among a number of active processes. A) Partition management B) Memory management C) Disk management D) All of the above

Last Answer : B) Memory management

Which of the following information not included in memory table? A) The allocation of main memory to process. B) The allocation of secondary memory to process C) Any information needed to manage virtual memory D) Any information about the existence of file

Description : Which of the following information not included in memory table? A) The allocation of main memory to process. B) The allocation of secondary memory to process C) Any information needed to manage virtual memory D) Any information about the existence of file

Last Answer : D) Any information about the existence of file

.................. is a facility that allows programmers to address memory from a logical point of view, without regard to the main memory, physically available. A) Visual memory B) Real memory C) Virtual memory D) Secondary memory

Description : .................. is a facility that allows programmers to address memory from a logical point of view, without regard to the main memory, physically available. A) Visual memory B) Real memory C) Virtual memory D) Secondary memory

Last Answer : C) Virtual memory

With ................ a page is brought into main memory only when the reference is made to a location on that page. A) demand paging B) main paging C) prepaging D) postpaging

Description : With ................ a page is brought into main memory only when the reference is made to a location on that page. A) demand paging B) main paging C) prepaging D) postpaging

Last Answer : A) demand paging

In ............. generation of operating system, operating system designers develop the concept of multiprogramming in which several jobs are in main memory at once. A) First B) Second C) Third D) Fourth

Description : In ............. generation of operating system, operating system designers develop the concept of multiprogramming in which several jobs are in main memory at once. A) First B) Second C) Third D) Fourth

Last Answer : C) Third

The main ingredient of the report documenting the ……………… is the cost benefit analysis. A) System Analysis B) Feasibility Study C) System Analyst D) System Design

Description : The main ingredient of the report documenting the ……………… is the cost benefit analysis. A) System Analysis B) Feasibility Study C) System Analyst D) System Design

Last Answer : B) Feasibility Study

The main task carried out in the …………… is to remove repeating attributes to separate tables. A) First Normal Form B) Second Normal Form C) Third Normal Form D) Fourth Normal Form

Description : The main task carried out in the …………… is to remove repeating attributes to separate tables. A) First Normal Form B) Second Normal Form C) Third Normal Form D) Fourth Normal Form

Last Answer : D) Fourth Normal Form

A job has four pages A, B, C, D and the main memory has two page frames only. The job needs to process its pages in following order: ABACABDBACD Assuming that a page interrupt occurs when a new page is brought in the main memory, irrespective of whether the page is swapped out or not. The number of page interrupts in FIFO and LRU page replacement algorithms are (A) 9 and 7 (B) 7 and 6 (C) 9 and 8 (D) 8 and 6

Description : A job has four pages A, B, C, D and the main memory has two page frames only. The job needs to process its pages in following order: ABACABDBACD Assuming that a page interrupt occurs when a new page is brought in the main ... replacement algorithms are (A) 9 and 7 (B) 7 and 6 (C) 9 and 8 (D) 8 and 6

Last Answer : (C) 9 and 8

Trace the error: void main( ) { int *b, &a; *b = 20 printf(“%d, %d”, a, *b) }

Description : Trace the error: void main( ) { int *b, &a; *b = 20 printf(“%d, %d”, a, *b) } (A) No error (B) Logical error (C) Syntax error (D) Semantic error

Last Answer : (C) Syntax error

What will be the output of the following segment of the program? main( ) { char *s = “hello world”; int i = 7; printf(“%, *s”, i, s); } (A) Syntax error (B) hello w (C) hello (D) o world

Description : What will be the output of the following segment of the program? main( ) { char *s = “hello world”; int i = 7; printf(“%, *s”, i, s); } (A) Syntax error (B) hello w (C) hello (D) o world

Last Answer : Answer: Marks given to all

All the classes necessary for windows programming are available in the module : (A) win.txt (B) win.main (C) win.std (D) MFC

Description : All the classes necessary for windows programming are available in the module : (A) win.txt (B) win.main (C) win.std (D) MFC

Last Answer : (A) win.txt

One of the main features that distinguish microprocessor from microcomputers is (A) words are usually larger in microprocessors. (B) words are shorter in microprocessors. (C) microprocessor does not contain I/O devices. (D) None of the above.

Description : One of the main features that distinguish microprocessor from microcomputers is (A) words are usually larger in microprocessors. (B) words are shorter in microprocessors. (C) microprocessor does not contain I/O devices. (D) None of the above.

Last Answer : (C) microprocessor does not contain I/O devices.

Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk service are not influenced by file allocation method. (C) Caching the directories and index blocks in main memory can also help in reducing disk arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

Description : Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk ... arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

Last Answer : (B) The number of requests for disk service are not influenced by file allocation method.

What will be the output of the following ‘C’ code ? main ( ) { int x = 128; printf (“\n%d”, 1 + x++); } (A) 128 (B) 129 (C) 130 (D) 131

Description : What will be the output of the following ‘C’ code ? main ( ) { int x = 128; printf (“\n%d”, 1 + x++); } (A) 128 (B) 129 (C) 130 (D) 131

Last Answer :  (B) 129

What is the output of the following program ? (Assume that the appropriate pre-processor directives are included and there is no syntax error) main() { char S[ ] = "ABCDEFGH"; printf ("%C",* (& S[3])); printf ("%s", S+4); printf ("%u", S); /* Base address of S is 1000 */ } (A) ABCDEFGH1000 (B) CDEFGH1000 (C) DDEFGHH1000 (D) DEFGH1000

Description : What is the output of the following program ? (Assume that the appropriate pre-processor directives are included and there is no syntax error) main() { char S[ ] = "ABCDEFGH"; printf ("%C",* (& ... Base address of S is 1000 */ } (A) ABCDEFGH1000 (B) CDEFGH1000 (C) DDEFGHH1000 (D) DEFGH1000

Last Answer : (D) DEFGH1000

The ............... transfers the executable image of a C++ program from hard disk to main memory. (A) Compiler (B) Linker (C) Debugger (D) Loader

Description : The ............... transfers the executable image of a C++ program from hard disk to main memory. (A) Compiler (B) Linker (C) Debugger (D) Loader

Last Answer : (D) Loader

In ............. method, the word is written to the block in both the cache and main memory, in parallel. (A) Write through (B) Write back (C) Write protected (D) Direct mapping

Description : In ............. method, the word is written to the block in both the cache and main memory, in parallel. (A) Write through (B) Write back (C) Write protected (D) Direct mapping

Last Answer : (A) Write through 

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 

In a paging system, it takes 30 ns to search translation Look-aside Buffer (TLB) and 90 ns to access the main memory. If the TLB hit ratio is 70%, the effective memory access time is: (1) 48 ns (2) 147 ns (3) 120 ns (4) 84 ns

Description : In a paging system, it takes 30 ns to search translation Look-aside Buffer (TLB) and 90 ns to access the main memory. If the TLB hit ratio is 70%, the effective memory access time is: (1) 48 ns (2) 147 ns (3) 120 ns (4) 84 ns

Last Answer : Answer: 2

What is the use of charAt() function?

Description : What is the use of charAt() function?

Last Answer : A: This function is used to extract characters at any given index from a String.

What is split() function?

Description : What is split() function?

Last Answer : A: split() function is a function of the String class and it breaks up any String into tokens and outputs the result in the form of an array.

Name some function of Scanner class.

Description : Name some function of Scanner class.

Last Answer : A: next(), nextInt(), hasNextInt() etc.

Name some function of StringTokenizer class.

Description : Name some function of StringTokenizer class.

Last Answer : A: nextToken(), countToken(), hasMoreTokens() etc.

What is the difference between function overloading and function overriding?

Description : What is the difference between function overloading and function overriding?

Last Answer : A: In function overloading only the function name is same but function signature (list of parameters) is different, whereas, in function overriding both the function name as well as function ... is an example of static polymorphism, whereas, function overriding is an example of dynamic polymorphism.

Can there be multiple return statements in a function?

Description : Can there be multiple return statements in a function?

Last Answer : A: Yes, but only one of them is executed.

Why is the ‘S’ of System.out.println() function capital?

Description : Why is the ‘S’ of System.out.println() function capital?

Last Answer : A: System is the name of a class present in java,lang package and hence it begins with a capital letter as is the convention for class names.

What is the function of readLine() method?

Description : What is the function of readLine() method?

Last Answer : A: readLine() method reads a line of text (which you input) and returns the result in the form of a String.

Which of the following is true about Java. A) Java does not support overloading. B) Java has replaced the destructor function of C++ C) There are no header files in Java. D) All of the above.

Description : Which of the following is true about Java. A) Java does not support overloading. B) Java has replaced the destructor function of C++ C) There are no header files in Java. D) All of the above.

Last Answer : D) All of the above

. ………….. function sets the fill pattern and color. A) floodfill () B) setcolor() C) setfillstyle() D) fillstyle ()

Description : . ………….. function sets the fill pattern and color. A) floodfill () B) setcolor() C) setfillstyle() D) fillstyle ()

Last Answer : C) setfillstyle()

………… function writes a string of text to a window. A) cputs () B) put () C) gets () D) tputs ()

Description : ………… function writes a string of text to a window. A) cputs () B) put () C) gets () D) tputs ()

Last Answer : A) cputs ()

Automatic initialization of object is carried out using a special member function called ………… A) Friend B) Casting C) Reference Parameter D) Constructor

Description : Automatic initialization of object is carried out using a special member function called ………… A) Friend B) Casting C) Reference Parameter D) Constructor

Last Answer : D) Constructor

Which of the following is/ are the characteristics of friend function. A) It is not in the scope of the class to which it has been declared as friend. B) It can invoke like a normal function without the help of any object. C) Usually, it has the objects as arguments. D) All of the above.

Description : Which of the following is/ are the characteristics of friend function. A) It is not in the scope of the class to which it has been declared as friend. B) It can invoke like a normal function without the help of any object. C) Usually, it has the objects as arguments. D) All of the above.

Last Answer : D) All of the above.

Which of the following condition is true for an object used as a function argument. i) A copy of the entire objects is passed to the function. ii) Only the address of the object is transferred to the function. A) Only i B) Only ii C) Both i and ii D) None of them

Description : Which of the following condition is true for an object used as a function argument. i) A copy of the entire objects is passed to the function. ii) Only the address of the object is transferred to the function. A) Only i B) Only ii C) Both i and ii D) None of them

Last Answer : C) Both i and ii

State True or False. i) A satic function can have access to only other static members (functions or variables) declared in the same class. ii) A static member function can be called using the class name (instead of its objects) A) True, True B) True, False C) False, True D) False, False

Description : State True or False. i) A satic function can have access to only other static members (functions or variables) declared in the same class. ii) A static member function can be called using the class name (instead of its objects) A) True, True B) True, False C) False, True D) False, False

Last Answer : B) True, False

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.

Which of the following cannot be passed to a function? A) Reference variable B) Arrays C) Class objects D) Header files

Description : Which of the following cannot be passed to a function? A) Reference variable B) Arrays C) Class objects D) Header files

Last Answer : D) Header files