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17/06/2024

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25/05/2024

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Answer: 0

📌 a.getFoo() returns 0 which is assigned in the bar, which is further incremented by 1.

📌 a.printFoo() simply prints the value of foo (which is 1)

📌 Hence we get the output as 0

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23/05/2024

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Answer: cbBC

📌 NOTE: Destructor calls in reverse order

📌 So the constructor of class C will be called first then class B will be called, after that first destructor of class B will be called then class C will be called.

📌 Hence we get "cbBC" as the output.

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23/05/2024

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Answer: 51

📌 printf("%d", ::var)
Here '::' means we are talking about variable which is out of scope(global variable)
So this statement will print var(global) and returns the number of characters it prints on console(which is 1)
There 5 is printed on the screen by this time. and the value 1 is returned by the printf statement and assigned in the 'var'(local)

📌 printf("%d", var++);
This statment will gonna print 1, since there is a post increment.

📌 int var = printf("%d", ::var);
printf("%d", var++);

int var = 1; // 5 is printed
printf("%d", var++);

int var = 1; // 5 is printed
print 1

📌 Hence we get 51 as the output.

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22/05/2024

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Answer: 0

📌 Arrays.copyOf() copies the specified array and padded it with new length

📌 Since the brr[3] element is not assigned to any value, so its by default value is 0

📌 Hence we get 0 as the output

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22/05/2024

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ANSWER - just swipe

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21/05/2024

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Answer: A

📌 NOTE: the variable 'third' declare on line 6 is only accesible throught that block we cannot access it outside that block.

📌 That's why the first printf() is giving output 20 - 10 = 10
ans 2nd printf() is giving output 20 + 10 = 30

📌 Hence we get "10 30" as the output.

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21/05/2024

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Answer: Bye

📌 == operator checks if two variable refer to the same object.

📌 Here a and b refers to two different objects. ?: is another form of if else statement that could be read as, condition : if true then do this : else do this.

📌 Hence we get "Bye" as the output.

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20/05/2024

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20/05/2024

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19/05/2024

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Answer: 10 40

📌 ptr = &a; (pointer ptr starts to point 'a')
ptr = &b; (now pointer ptr starts to point 'b')

📌 *ptr = *ptr+*ptr;
This statement is equal to

b = 20 + 20 (since ptr points to b therefore *ptr = b)

📌 Hence we get "10 40" as the output.

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19/05/2024

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Answer: compilation error

📌 In Java if() block expects a boolean value and we are providing an integer value.

📌 Hence we get "Compilation error" as the output.

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