COINQUEST: A Techno-Feud' 23.5

Who is the father of personal computer?

• Edward Robert

• Charles Babbage

• Allen turing

• Robert cailliau

Find the missing line in the code:

• a = a - b;

  b = a + b;

  a = a – b;

• a = a + b;

  b = a - b;

  a = a + b;

• a = a + b;

  b = a - b;

  a = a - b;

• b = a - b;

  b = a + b;

  a = a - b;

1. Output of following C Program?

• ERROR

• 0

• 1

• 5

Answer explanation

The crux of the question lies in the statement x = y==z. The operator == is executed before = because precedence of comparison operators (<=, >= and ==) is higher than assignment operator =. 
The result of a comparison operator is either 0 or 1 based on the comparison result. Since y is equal to z, value of the expression y == z becomes 1 and the value is assigned to x via the assignment operator.

3. Output of following Java Program?

• Derived::show() called

• Base::show() called

Answer explanation

In the above program, b is a reference of Base type and refers to an abject of Derived class. In Java, functions are virtual by default. So the run time polymorphism happens and derived fun() is called.

Output of following PYTHON Program?

• 8

• 16

• INDENTATION ERROR

• RUNTIME ERROR

Answer explanation

Python creates blocks of code based on the indentation of the code. Thus, new indent defines a new scope.

Find the cities name with the condition and temperature from table 'whether' where condition = sunny or cloudy but temperature >= 60.

• SELECT city, temperature, condition FROM weather WHERE condition = 'cloudy' AND condition = 'sunny' OR temperature >= 60

• SELECT city, temperature, condition FROM weather WHERE condition = 'cloudy' OR condition = 'sunny' OR temperature >= 60

• SELECT city, temperature, condition FROM weather WHERE condition = 'sunny' OR condition = 'cloudy' AND temperature >= 60

• SELECT city, temperature, condition FROM weather WHERE condition = 'sunny' AND condition = 'cloudy' AND temperature >= 60

Answer explanation

We know that the AND operator gives the output only when both the first conditions are true. In contrast, the OR operator gives the output when either the first condition OR the second condition is true. Hence the option C is the correct choice.

Suppose the numbers 7, 5, 1, 8, 3, 6, 0, 9, 4, 2 are inserted in that order into an initially empty binary search tree. The binary search tree uses the usual ordering on natural numbers. What is the in-order traversal sequence of the resultant tree?a.7 5 1 0 3 2 4 6 8 9

• 7 5 1 0 3 2 4 6 8 9

• 0 2 4 3 1 6 5 9 8 7

• 0 1 2 3 4 5 6 7 8 9

• 9 8 6 4 2 3 0 1 5 7

Which of the following sorting algorithms has the worst time complexity?

• Quick Sort

• Merge Sort

• Bubble Sort

• Insertion Sort

Point out the error in the program

• Error: suspicious char to in conversion in scanf()

• Error: we may not get input for second scanf() statement

• No error

• None of above

Answer explanation

We should be knowing that char datatype can contain alphabet, "NUMBER", empty space etc. Thus in the first scanf, character specifier is used to get a "NUMBER" of integer datatype 'i'. And in the second scanf, integer specifier is used to get a character of char datatype 'ch' which is not possible and showing compilation error.

Who is known as the Human Computer of India?"

• APJ Abdul Kalam

• Shakunthala Devi

• Shiva Ayyadurai

• Sundar Pichai