Explore topic-wise MCQs in General Awareness.

This section includes 1698 Mcqs, each offering curated multiple-choice questions to sharpen your General Awareness knowledge and support exam preparation. Choose a topic below to get started.

701.

Which is valid in a class that extends class A? class A { protected int method1(int a, int b) { return 0; } }

A. Public int method1(int a, int b) {return 0; }
B. Private int method1(int a, int b) { return 0; }
C. Public short method1(int a, int b) { return 0; }
D. Static protected int method1(int a, int b) { return 0; }
Answer» B. Private int method1(int a, int b) { return 0; }
Discussion
702.

What is the output of this program? Note: Host URL is written in html and simple text. import java.net.*; class networking { public static void main(String[] args) throws Exception { URL obj = new URL("https://www.mcqsmentor.com/"); URLConnection obj1 = obj.openConnection(); System.out.print(obj1.getContentType()); } }

A. Html
B. Text
C. Html/text
D. Text/html
Answer» E.
Discussion
703.

What is the output of this program? Note: Host URL is having length of content 127. import java.net.*; class networking { public static void main(String[] args) throws Exception { URL obj = new URL("https://www.mcqsmentor.com/"); URLConnection obj1 = obj.openConnection(); int len = obj1.getContentLength(); System.out.print(len); } }

A. 126
B. 127
C. Compilation Error
D. Runtime Error
Answer» C. Compilation Error
Discussion
704.

What is the output of this program? Note: Host URL was last modified on july 18 tuesday 2013 . import java.net.*; class networking { public static void main(String[] args) throws Exception { URL obj = new URL("https://www.mcqsmentor.com/"); URLConnection obj1 = obj.openConnection(); System.out.print(obj1.getLastModified); } }

A. July
B. 18-6-2013
C. Tue 18 Jun 2013
D. Tue Jun 18 2013
Answer» E.
Discussion
705.

What is the output of this program? import java.io.*; class Chararrayinput { public static void main(String[] args) { String obj = "abcdefgh"; int length = obj.length(); char c[] = new char[length]; obj.getChars(0, length, c, 0); CharArrayReader input1 = new CharArrayReader(c); CharArrayReader input2 = new CharArrayReader(c, 1, 4); int i; int j; try { while ((i = input1.read()) == (j = input2.read())) { System.out.print((char)i); } } catch (IOException e) { e.printStackTrace(); } } }

A. Abc
B. Abcd
C. Abcde
D. None of the mentioned
Answer» E.
Discussion
706.

Which two of the following are legal declarations for nonnested classes and interfaces? 1. final abstract class Test {} 2. public static interface Test {} 3. final public class Test {} 4. protected abstract class Test {} 5. protected interface Test {} 6. abstract public class Test {}

A. 1 and 4
B. 2 and 5
C. 3 and 6
D. 4 and 6
Answer» D. 4 and 6
Discussion
707.

What is the output of this program? Note: Execution command line: $ java exception_handling one two class exception_handling { public static void main(String args[]) { try { int a = args.length; int b = 10 / a; System.out.print(a); try { if (a == 1) a = a / a - a; if (a == 2) { int c = {1}; c[8] = 9; } } catch (ArrayIndexOutOfBoundException e) { System.out.println("TypeA"); } catch (ArithmeticException e) { System.out.println("TypeB"); } } }

A. TypeA
B. TypeB
C. 0TypeA
D. 0TypeB
Answer» E.
Discussion
708.

What is the output of this program? class Output { public static void main(String args[]) { double x = 3.14; int y = (int) Math.ceil(x); System.out.print(y); } }

A. 0
B. 3
C. 3.0
D. 4
Answer» E.
Discussion
709.

What is the output of this program?

A. Runtime Error
Answer» B.
Discussion
710.

What will be the output of the program? Note: The command line invocation is > java X a b public class X { public static void main(String [] args) { String names [] = new String[5]; for (int x=0; x < args.length; x++) names[x] = args[x]; System.out.println(names[2]); } }

A. Names
B. Null
C. Compilation fails
D. An exception is thrown at runtime
Answer» C. Compilation fails
Discussion
711.

The HTML element is a A. Inline element B. Outline element C. Block level element D. None Answer: C . Block level element 0Shares0 0

A. Inline element
B. Outline element
C. Block level element
D. None
Answer» D. None
Discussion
712.

Which class uses hierarchical inheritance in following code? class A { int a; }; class B:class A { int b; }; class C:class A,class B { int c; }; class D:class A { int d; };

A. Class A,B,C
B. Class B,C,D
C. Class A,C,D
D. Class D,A,B
Answer» E.
Discussion
713.

Which among the following is correct for following code ? abstract class A { public Int a; public void disp(); }; class B:public A { public: void dis() { court<<a; } }; class C:private A { public void incr() { a++; } } void main() { B b.disp(); }

A. Compile time error
B. Runtime error
C. Program runs and o/p is 0
D. Program runs and o/p is garbage value
Answer» B. Runtime error
Discussion
714.

Which method in the code below is single level inherited? class A { protected int a, b; public: void show() { cout<<a<<b; } }; class B: public A { public: void disp() { cout<<a++<<b++; } }; class C: private A, public B { void avg() { cout<<(a+b)/2; } };

A. Class A
B. Class B
C. Class C
D. None
Answer» C. Class C
Discussion
715.

Output of following program? class A { protected: int a,b; public: void disp() { cout<<a<<b; } }; class B:public A { int x,y; };

A. Garbage value
B. Compile time error
C. Runtime error
D. Runs but gives random values as output
Answer» C. Runtime error
Discussion
716.

Which type of inheritance is illustrated by the following code? class student{ public: int marks; }; class topper: public student { public: char grade; }; class average{ public: int makrs_needed; }; class section: public average{ public: char name[10]; }; class overall: public average{ public: int students; };

A. Single level
B. Multilevel and single level
C. Hierarchical
D. Hierarchical and single level
Answer» D. Hierarchical and single level
Discussion
717.

Which among the following is correct for the following code? class A { public : class B { public : B(int i): data(i) { } int data; } }; class C: public A { class D:public A::B{ }; };

A. Multi-level inheritance is used, with nested classes
B. Multiple inheritance is used, with nested classes
C. Single level inheritance is used, with enclosing classes
D. Single level inheritance is used, with both enclosing and nested classes
Answer» E.
Discussion
718.

Which members can t be accessed in derived class in multiple inheritance ?

A. Private members of base
B. Public members of base
C. Protected members of base
D. All the members of base
Answer» B. Public members of base
Discussion
719.

Does following code show multiple inheritance? class A { int a; }; class B { int b; }; class C:public A, public B { int c; }; class D:public C { int d; };

A. Yes, class C and class D
B. Yes, All together it s multilevel
C. No, 4 classes are used
D. No, multiple inheritance is used with class A, B and C
Answer» E.
Discussion
720.

What will be the output of the following code? import java.awt.Point; class Testing { public static void main(String[] args) { Point t1,t2,t3; t1=new Point(100,100); t2=t1; t3=t1; t1.x=200; t1.y=200; t2.x=300; t3.y=500; System.out.println( Point 1: + p1.x + , + p1.y); } }

A. Point 1: 200, 200
B. Point 1: 100,100
C. Point 1: 300, 300
D. Point 1: 300, 500
Answer» E.
Discussion
721.

What will be the output of the following code? Class A { int i; public : A(int n) { i=n; cout<< inside constructor ; } ~A() { cout<< destroying <<i; } void seti(int n) { i=n; } int geti() { return I; } }; void t(A ob) { cout<< something ; } int main() { A a(1); t(a); cout<< this is i in main ; cout<<a.geti(); }

A. Inside constructor something destroying 2this is i in main destroying 1
B. Inside constructor something this is i in main destroying 1
C. Inside constructor something destroying 2this is i in main
D. Something destroying 2this is i in main destroying 1
Answer» B. Inside constructor something this is i in main destroying 1
Discussion
722.

The object can t be:

A. Passed by reference
B. Passed by value
C. Passed by copy
D. Passed as function
Answer» E.
Discussion
723.

What is size of the object of following class (64 bit system)?class student { int rollno; char name[20]; static int studentno; };

A. 20
B. 22
C. 24
D. 28
Answer» D. 28
Discussion
724.

Which feature of OOP is indicated by the following code? class student{ int marks; }; class topper:public student{ int age; topper(int age){ this.age=age; } };

A. Inheritance
B. Polymorphism
C. Inheritance and polymorphism
D. Encapsulation and Inheritance
Answer» E.
Discussion
725.

Which class/set of classes can illustrate polymorphism in the following code: abstract class student { public : int marks; calc_grade(); } class topper:public student { public : calc_grade() { return 10; } }; class average:public student { public : calc_grade() { return 20; } }; class failed{ int marks; };

A. Only class student can show polymorphism
B. Only class student and topper together can show polymorphism
C. All class student, topper and average together can show polymorphism
D. Class failed should also inherit class student for this code to work for polymorphism
Answer» D. Class failed should also inherit class student for this code to work for polymorphism
Discussion
726.

Which among following is correct for initializing the class below? class student{ int marks; int cgpa; public: student(int i, int j){ marks=I; cgpa=j } };

A. Student s[3]={ s(394, 9); s(394, 9); s(394,9), };
B. Student s[2]={ s(394,9); s(222,5) };
C. Student s[2]={ s1(392,9); s2(222,5) };
D. Student s[2]={ s[392,9]; s2[222,5] };
Answer» C. Student s[2]={ s1(392,9); s2(222,5) };
Discussion
727.

What is default access specifier for data members or member functions declared within a class without any specifier, in C++ ? class Student { int a; public : float a; };

A. Private
B. Protected
C. Public
D. Depends on compiler
Answer» B. Protected
Discussion
728.

What is output of the following program? class student { public : int marks; void disp() { cout<

A. Its base classIts derived class
B. Its base class Its derived class
C. Its derived classIts base class
D. Its derived class Its base class
Answer» B. Its base class Its derived class
Discussion
729.

Find the output of the program: class education { char name[10]; public : disp() { cout<

A. Its school education system
B. Its education system
C. Its school education systemIts education system
D. Its education systemIts school education system
Answer» B. Its education system
Discussion
730.

Consider the following code and select the correct option: class student { int marks; public : int* fun() { return &marks; } }; main() { student s; int *ptr=c.fun(); return 0; }

A. This code is good to go
B. This code may result in undesirable conditions
C. This code will generate error
D. This code violates encapsulation
Answer» E.
Discussion
731.

Consider the following code snippet: var f = new java.io.File( /tmp/test ); var out = new java.io.FileWriter(f); out instanceof java.io.Reader What will be the output for the above code snippet?

A. Error
B. True
C. Exception
D. False
Answer» E.
Discussion
732.

Consider the following code snippet: const pi=3.14; var pi=4; console.log(pi); What will be the output for the above code snippet?

A. This will flash an error
B. Prints 4
C. Prints 3.14
D. Ambiguity
Answer» B. Prints 4
Discussion
733.

Consider the following code snippet. What would be the output if oddsums(5); is executed afted the below code snippet ? namespace McqsMentorConsoleApplication function oddsums(n) { let total = 0, result=[]; for(let x = 1; x <= n; x++) { let odd = 2*x-1; total += odd; result.push(total); } return result; }

A. Returns [1,4,9,16,25]
B. Returns [1,2,3,4,5]
C. Returns [3,6,9,12,15]
D. Returns [1,3,5,7,9]
Answer» B. Returns [1,2,3,4,5]
Discussion
734.

Consider the following code snippet: console.log(p) If p is not defined, what would be the result or type of error?

A. Zero
B. Null
C. ReferenceError
D. ValueNotFoundError
Answer» D. ValueNotFoundError
Discussion
735.

Consider the following code snippet: let x=x+1; console.log(x); What will be the result for the above code snippet?

A. 0
B. Null
C. ReferenceError
D. NaN
Answer» E.
Discussion
736.

Consider the following code snippet: [x,y]=[y,x]; What is the result of the above code snippet?

A. Throws exception
B. Swap the value of the two variables
C. Flashes an error
D. Creates a new reference object
Answer» D. Creates a new reference object
Discussion
737.

Consider the following code snippet: let succ = function(x) x+1, yes = function() true, no = function() false; What convenience does the above code snippet provide?

A. Functional behaviour
B. Modular behaviour
C. No convenience
D. Shorthand expression
Answer» B. Modular behaviour
Discussion
738.

Consider the following code snippet: data.sort(function(a,b),b-a); What does the above code do?

A. Sort in the alphabetical order
B. Sort in the chronological order
C. Sort in reverse alphabetical order
D. Sort in reverse numerical order
Answer» E.
Discussion
739.

The $ present in the RegExp object is called a

A. Character
B. Matcher
C. Metacharacter
D. Metadata
Answer» D. Metadata
Discussion
740.

Consider the following statement containing regular expressions var text = testing: 1, 2, 3 ; var pattern = /d+/g; In order to check if the pattern matches, the statement is

A. Text==pattern
B. Text.equals(pattern)
C. Text.test(pattern)
D. Pattern.test(text)
Answer» E.
Discussion
741.

Consider the following statement var Set = sets.Set; var s = new Set(1,2,3); What could be the efficiency quotient of the above two statements ?

A. The programmer imports at once the frequently used values into the global namespace
B. There is no efficiency quotient, the programmer tries to make it inefficient
C. The programmer needs to import the Sets everytime he wants to use it
D. All of the mentioned
Answer» B. There is no efficiency quotient, the programmer tries to make it inefficient
Discussion
742.

Consider the following code snippet var sets = com.davidflanagan.collections.sets; What is the programmer trying to do in the above code snippet?

A. Importing a single module
B. Importing a module partially
C. Importing a namespace
D. Importing the entire module
Answer» E.
Discussion
743.

Consider the code snippet given below: var count = [1,,3]; What is the observation made?

A. The omitted value takes "undefined"
B. This results in an error
C. This results in an exception
D. None of the mentioned
Answer» B. This results in an error
Discussion
744.

Consider the following code snippet. The result would be namespace McqsMentorConsoleApplication var a1 = [,,,]; var a2 = new Array(3); 0 in a1 0 in a2

A. True false
B. False true
C. True true
D. False true
Answer» B. False true
Discussion
745.

Consider the following code snippet : if (!a[i]) continue ; What is the observation made ?

A. Skips the undefined elements
B. Skips the non existent elements
C. Skips the null elements
D. All of the mentioned
Answer» E.
Discussion
746.

Consider the following code snippet : var a = [1,2,3,4,5]; a.slice(0,3); What is the possible output for the above code snippet ?

A. Returns [1,2,3]
B. Returns [4,5]
C. Returns [1,2,3,4]
D. Returns [1,2,3,4,5]
Answer» B. Returns [4,5]
Discussion
747.

Consider the following code snippet. The final output for the shift() is namespace McqsMentorConsoleApplication var a = []; a.unshift(1); a.unshift(22); a.shift(); a.unshift(3,[4,5]); a.shift(); a.shift(); a.shift();

A. 1
B. [4,5]
C. [3,4,5]
D. Exception is thrown
Answer» B. [4,5]
Discussion
748.

Consider the following code snippet. What will the code snippet result ? namespace McqsMentorConsoleApplication function printprops(o) { for(var p in o) console.log(p + ": " + o[p] + "n"); }

A. Prints the contents of each property of o
B. Returns undefined
C. All of the mentioned
D. None of the mentioned
Answer» C. All of the mentioned
Discussion
749.

Consider the following code snippet. What is the function of the code snippet? namespace McqsMentorConsoleApplication var scope = "global scope"; function checkscope() { var scope = "local scope"; function f() { return scope; } return f;

A. Returns value null
B. Returns exception
C. Returns the value in scope
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
750.

Consider the following code snippet. What does the below code result? namespace McqsMentorConsoleApplication function hypotenuse(a, b) { function square(x) { return x*x; } return Math.sqrt(square(a) + square(b)); }

A. Sum of square of a and b
B. Square of sum of a and b
C. Sum of a and b square
D. None of the mentioned
Answer» B. Square of sum of a and b
Discussion