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MCQOPTIONS
This section includes 1331 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.
| 901. |
Pure virtual functions |
| A. | have to be redefined in the inherited class. |
| B. | cannot have public access specification. |
| C. | are mandatory for a virtual class. |
| D. | None of the above. |
| Answer» B. cannot have public access specification. | |
| 902. |
A struct is the same as a class except that |
| A. | there are no member functions. |
| B. | all members are public. |
| C. | cannot be used in inheritance hierarchy. |
| D. | it does have a this pointer. |
| Answer» D. it does have a this pointer. | |
| 903. |
The operator that cannot be overloaded is |
| A. | ++ |
| B. | :: |
| C. | () |
| D. | ~ |
| Answer» C. () | |
| 904. |
A friend function to a class, C cannot access |
| A. | private data members and member functions. |
| B. | public data members and member functions. |
| C. | protected data members and member functions. |
| D. | the data members of the derived class of C. |
| Answer» E. | |
| 905. |
A variable defined within a block is visible |
| A. | from the point of definition onward in the program. |
| B. | from the point of definition onward in the function. |
| C. | from the point of definition onward in the block. |
| D. | throughout the function. |
| Answer» D. throughout the function. | |
| 906. |
If we create a file by ‘ifstream’, then the default mode of the file is ............... |
| A. | ios :: out |
| B. | ios :: in |
| C. | ios :: app |
| D. | ios :: binary |
| Answer» C. ios :: app | |
| 907. |
The process of building new classes from existing one is called |
| A. | Structure. |
| B. | Inheritance. |
| C. | Polymorphism. |
| D. | Template. |
| Answer» C. Polymorphism. | |
| 908. |
The keyword friend does not appear in |
| A. | the class allowing access to another class. |
| B. | the class desiring access to another class. |
| C. | the private section of a class. |
| D. | the public section of a class. |
| Answer» D. the public section of a class. | |
| 909. |
You can read input that consists of multiple lines of text using |
| A. | the normal cout << combination. |
| B. | the cin.get( ) function with one argument. |
| C. | the cin.get( ) function with two arguments. |
| D. | the cin.get( ) function with three arguments. |
| Answer» D. the cin.get( ) function with three arguments. | |
| 910. |
A property which is not true for classes is that they |
| A. | are removed from memory when not in use. |
| B. | permit data to be hidden from other classes. |
| C. | bring together all aspects of an entity in one place. |
| D. | Can closely model objects in the real world. |
| Answer» D. Can closely model objects in the real world. | |
| 911. |
Which of the following cannot be legitimately passed to a function |
| A. | A constant. |
| B. | A variable. |
| C. | A structure. |
| D. | A header file. |
| Answer» E. | |
| 912. |
Overloading the function operator |
| A. | requires a class with an overloaded operator. |
| B. | requires a class with an overloaded [ ] operator. |
| C. | allows you to create objects that act syntactically like functions. |
| D. | usually make use of a constructor that takes arguments. |
| Answer» B. requires a class with an overloaded [ ] operator. | |
| 913. |
To perform stream I/O with disk files in C++, you should |
| A. | open and close files as in procedural languages. |
| B. | use classes derived from ios. |
| C. | use C language library functions to read and write data. |
| D. | include the IOSTREAM.H header file. |
| Answer» C. use C language library functions to read and write data. | |
| 914. |
In access control in a protected derivation, visibility modes will change as follows: |
| A. | private, public and protected become protected |
| B. | only public becomes protected. |
| C. | public and protected become protected. |
| D. | only private becomes protected. |
| Answer» D. only private becomes protected. | |
| 915. |
Maximum number of template arguments in a function template is |
| A. | one |
| B. | two |
| C. | three |
| D. | many |
| Answer» E. | |
| 916. |
If a base class destructor is not virtual, then |
| A. | It can not have a function body. |
| B. | It can not be called. |
| C. | It can not be called when accessed from pointer. |
| D. | Destructor in derived class can not be called when accessed through a pointer to the base class. |
| Answer» E. | |
| 917. |
Mechanism of deriving a class from another derived class is known as ............. |
| A. | Polymorphism |
| B. | Single Inheritance |
| C. | Multilevel Inheritance |
| D. | Message Passing |
| Answer» D. Message Passing | |
| 918. |
If an array is declared as int a[4] = {3, 0, 1, 2}, then values assigned to a[0] & a[4] will be .................. |
| A. | 3, 2 |
| B. | 0, 2 |
| C. | 3, 0 |
| D. | 0, 4 |
| Answer» D. 0, 4 | |
| 919. |
If x = 5, y = 2 then x ᴧ y equals ............... |
| A. | 00000111 |
| B. | 10000010 |
| C. | 10100000 |
| D. | 11001000 |
| Answer» B. 10000010 | |
| 920. |
The ................... statement causes immediate exit from the loop overriding the condition test |
| A. | Exit |
| B. | Break |
| C. | Goto |
| D. | None of the above |
| Answer» C. Goto | |
| 921. |
Usually a pure virtual function |
| A. | has complete function body. |
| B. | will never be called. |
| C. | will be called only to delete an object. |
| D. | is defined only in derived class. |
| Answer» E. | |
| 922. |
If the variable count exceeds 100, a single statement that prints “Too many” is |
| A. | if (count<100) cout << “Too many”; |
| B. | if (count>100) cout >> “Too many”; |
| C. | if (count>100) cout << “Too many”; |
| D. | None of these. |
| Answer» D. None of these. | |
| 923. |
If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access |
| A. | protected and public data only in C and B. |
| B. | protected and public data only in C. |
| C. | private data in A and B. |
| D. | protected data in A and B. |
| Answer» E. | |
| 924. |
The process of building new classes from existing one is called ............. |
| A. | Polymorphism |
| B. | Structure |
| C. | Inheritance |
| D. | Cascading |
| Answer» D. Cascading | |
| 925. |
What is the output of the following code char symbol[3]={‘a’,‘b’,‘c’}; for (int index=0; index |
| A. | a b c |
| B. | “abc” |
| C. | abc |
| D. | ‘abc’ |
| Answer» D. ‘abc’ | |
| 926. |
The address of a variable temp of type float is |
| A. | *temp |
| B. | &temp |
| C. | float& temp |
| D. | float temp& |
| Answer» C. float& temp | |
| 927. |
int **ptr; is |
| A. | Invalid declaration |
| B. | Pointer to pointer |
| C. | Pointer to integer |
| D. | none of the above |
| Answer» C. Pointer to integer | |
| 928. |
A possible output of the following program fragment is for (i=getchar();; i=get.char()) if (i==‘x’) break; else putchar(i); |
| A. | mi |
| B. | mix |
| C. | mixx |
| D. | none of the above |
| Answer» E. | |
| 929. |
Given a class named Book, which of the following is not a valid constructor? |
| A. | Book ( ) { } |
| B. | Book ( Book b) { } |
| C. | Book ( Book &b) { } |
| D. | Book (char* author, char* title) { } |
| Answer» C. Book ( Book &b) { } | |
| 930. |
The members of a class, by default, are |
| A. | public |
| B. | protected |
| C. | private |
| D. | mandatory to specify |
| Answer» D. mandatory to specify | |
| 931. |
In which case is it mandatory to provide a destructor in a class? |
| A. | Almost in every class |
| B. | Class for which two or more than two objects will be created |
| C. | Class for which copy constructor is defined |
| D. | Class whose objects will be created dynamically |
| Answer» E. | |
| 932. |
What is the output of the following code int n = 0, m=1; do { printf(“%d”, m); m++; } while(m |
| A. | 0 |
| B. | 2 |
| C. | 1 |
| D. | 4 |
| Answer» D. 4 | |
| 933. |
A C program contains the following declaration int i=8, j=5 what would be the value of following expression ? abs(i-2*j) |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» B. 4 | |
| 934. |
Which of the following numerical value is invalid constant |
| A. | .75 |
| B. | 9.3e2 |
| C. | 27,512 |
| D. | 123456 |
| Answer» D. 123456 | |
| 935. |
The operators > are |
| A. | assignment operator |
| B. | relational operator |
| C. | logical operator |
| D. | bitwise shift operator |
| Answer» E. | |
| 936. |
Unsigned integer occupies .................. |
| A. | Two bytes |
| B. | Four bytes |
| C. | One byte |
| D. | Eight bytes |
| Answer» C. One byte | |
| 937. |
Which of the following is true for the statement: NurseryLand.Nursery.Students = 10; |
| A. | The structure Students is nested within the structure Nursery. |
| B. | The structure NurseryLand is nested within the structure Nursery. |
| C. | The structure Nursery is nested within the structure NurseryLand. |
| D. | The structure Nursery is nested within the structure Students. |
| Answer» D. The structure Nursery is nested within the structure Students. | |
| 938. |
Which of the following statements are true in c++? |
| A. | Classes can not have data as public members. |
| B. | Structures can not have functions as members. |
| C. | Class members are public by default. |
| D. | None of these. |
| Answer» C. Class members are public by default. | |
| 939. |
Which of the following is the odd one out? |
| A. | j = j + 1; |
| B. | j =+ 1; |
| C. | j++; |
| D. | j += 1; |
| Answer» C. j++; | |
| 940. |
‘C’ is often called a |
| A. | Object oriented language |
| B. | High level language |
| C. | Assembly language |
| D. | Machine level language |
| Answer» C. Assembly language | |
| 941. |
The .............. operator is a technique to forcefully convert one data type to the others |
| A. | Cast |
| B. | Conversion |
| C. | Type |
| D. | Uniary |
| Answer» B. Conversion | |
| 942. |
The following code displays main( ) { int *p; p = (int*) malloc(sizeof(int)); *p = 10; printf(“p = %d\n”, *p); } |
| A. | 10 |
| B. | 1542 (address of p) |
| C. | 20 |
| D. | None of the above |
| Answer» B. 1542 (address of p) | |
| 943. |
The expression P >> 6 shifts all bits of P six places to right. What is the value of P >> 6 if P = 0×6db7 ? |
| A. | 0×1234 |
| B. | 0×0001 |
| C. | 0×0000 |
| D. | 0×1B6 |
| Answer» E. | |
| 944. |
If a = 5 and b = 7 then the statement p = (a > b) : a ? b |
| A. | assigns a value 5 to p |
| B. | assigns a value 7 to p |
| C. | assigns a value 8 to p |
| D. | gives an error message |
| Answer» E. | |
| 945. |
Which amongst the following is not a keyword ? |
| A. | external |
| B. | Int |
| C. | float |
| D. | double |
| Answer» B. Int | |
| 946. |
Given the statement, maruti.engine.bolts=25; which of the following is true ? |
| A. | Structure bolts is nested within structure engine |
| B. | Structure engine is nested within structure maruti |
| C. | Structure maruti is nested within structure engine |
| D. | Structure maruti nested within structure bolts |
| Answer» C. Structure maruti is nested within structure engine | |
| 947. |
What would be output of the following program, if the array begins at 65486 ? main() { int arr[ ] = {12, 14, 15, 23, 45}; printf(“%u%u”, arr+1, &arr+1); } |
| A. | 65486, 65486 |
| B. | 65488, 65488 |
| C. | 65488, 65496 |
| D. | None of the above |
| Answer» D. None of the above | |
| 948. |
What would be output of the following program ? #include "stdio.h" main() { printf(“%d%d”, size of (NULL!), size of (“ “)); } |
| A. | 2 1 |
| B. | 1 2 |
| C. | 2 2 |
| D. | 1 1 |
| Answer» D. 1 1 | |
| 949. |
What would be output of the following program ? # define SQR(X) (X*X) main() { int a, b=3; a = SQR(b+2); printf(“\n%d”, a); } |
| A. | 25 |
| B. | 11 |
| C. | Error |
| D. | Garbage value |
| Answer» C. Error | |
| 950. |
How many times the following program would print (“abc”) ? main() { printf(“\nabc”); main(); } |
| A. | Infinite number of times |
| B. | 32767 times |
| C. | 65535 times |
| D. | Till the stack does not overflow |
| Answer» B. 32767 times | |